38 results on '"forestry biomass"'
Search Results
2. Utilising Torrefaction to Determine the Fuel Characteristics of Forestry and Agricultural Biomass for Solid Biofuel
- Author
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Park, Sunyong, Kim, Seok Jun, Oh, Kwang Cheol, Kim, Seon Yeop, Kim, Ha Eun, and Kim, Dae Hyun
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- 2024
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3. Impact of human activities on forest resources and wildlife population
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Rachana Pathak, Vinay Verma, and Manju Agarwal
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forestry biomass ,depletion ,human population ,human activities ,stability ,persistence ,Technology (General) ,T1-995 ,Science - Abstract
Nowadays, management and regulation of natural resources like agriculture, fisheries, forestry and wildlife is one of the popular topics in research. The evolution of humankind is largely dependent on the quality of the environment and the resources it provides; but numerous human-induced factors, and climate change may drastically change the conditions of human sustainability. A wide range of human activities on forestland contribute to climatic change, prominent among these are, deforestation, desertification, industrialization, urbanization and other socio-economic activities. In this paper, attempts have been made to trace the causes and consequences of these human activities on the depletion of forestry resources. A nonlinear mathematical model is proposed and analyzed. In modeling process, we assume that the growth rate of wildlife population wholly depend on forestry biomass. It is depleted by human activities. Local and global stability analysis of the mathematical model along with the persistence of the system is checked using theory of nonlinear ordinary differential equations. Analytical results obtained are justified numerically through numerical simulation. Important parameters are investigated and variation of variables with change in these parameters is determined.
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- 2021
4. Impacts of lockdown on the dynamics of forestry biomass, wildlife species and control of atmospheric pollution
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Devi, Sapna, Fatma, Reda, and Verma, Vinay
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- 2023
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5. Waste as Resource
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Dornack, Christina, Zentner, Axel, Zehm, Antje, Kaltschmitt, Martin, editor, and Neuling, Ulf, editor
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- 2018
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6. Mass transfer during forest biomass particles drying in a fluidised bed.
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Moreno, Rogelio M., Antolín, Gregorio, and Reyes, Alejandro E.
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MASS transfer coefficients , *MASS transfer , *FOREST biomass , *REYNOLDS number , *PARTICLES , *MANUFACTURING processes - Abstract
The drying of biomass particles is an important industrial process where heat and mass transfer simultaneously occur. Following on from our previous work on convective heat transfer, here we report experimental results obtained by analysing the mass transfer between the gas and the surface of the wood particles, during drying in a mechanically stirred fluidised bed. It is assumed that, during the constant drying rate period, the moisture concentration of the gas on the surface of the particle is constant. The results have allowed us to obtain a correlation between the Sherwood number and the Reynolds number in the range of Re p between 102 and 257; the proposed correlation Sh gp = Sh gp (Re p) predicts the surface mass transfer coefficient with an average deviation of 30% in relation to experimental data. • Experimental results on mass transfer between the gas and wood particles. • Convective mass transfer coefficient for the drying of forest biomass particles. • The experiences were carried out in a in a mechanically stirred fluidised bed dryer. • Mass transfer coefficient varied between 6 × 10−3 and 20 × 10−3 m s−1. • A correlation between the Sherwood number and the Reynolds number is proposed. [ABSTRACT FROM AUTHOR]
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- 2020
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7. Forestry biomass and its role in controlling bronchitis in urban areas: a nonlinear modelling study
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Tandon, Abhinav, Banerjee, Sankha, and Jyotsna, Kumari
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- 2022
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8. 林业生物质基果蔬涂膜保鲜剂的研究进展.
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许嘉琍, 张海波, 姚姝凤, 高宏, and 商士斌
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Copyright of Chemistry & Industry of Forest Products is the property of Chemistry & Industry of Forest Products Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2019
9. Torrefaction of Agriculture and Forestry Biomass Using TGA-FTIR-MS
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Harun, Noorfidza Yub, Afzal, Muhammad T., Dincer, Ibrahim, editor, Midilli, Adnan, editor, and Kucuk, Haydar, editor
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- 2014
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10. CAPTURA DE CARBONO EN BIOMASA EN PLANTACIONES FORESTALES Y SISTEMAS AGROFORESTALES EN ARMERO-GUAYABAL, TOLIMA, COLOMBIA.
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Patiño, Stefanny, Suárez, Lanni N., Andrade, Hernán J., and Segura, Milena A.
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CLIMATE change mitigation , *CARBON fixation , *CARBON cycle , *BIOMASS estimation , *AGROFORESTRY , *TREE farms , *PLANT biomass - Abstract
Climate change has altered the areas for forestry plantations (FP) and agroforestry systems (AFS), which provide goods and ecosystem services, such as mitigation of climate change at capturing carbon in biomass. The objective of this study was the estimation of total biomass and carbon storage and fixation in FP and AFS. This research was carried out in the Centro Universitario Regional del Norte (CURDN) of the Universidad del Tolima, located in Armero-Guayabal, Tolima. It was estimated the carbon storage and fixation in aboveground (AB) and bellowground biomass (BB) in seven FP and AFS. It was measured the total height and diameter at breast height (dbh) of trees with dbh>10 cm and diameter at 30 cm height (D30) in cacao plants in temporal sampling plots with different size. AB was estimated using allometric models or alternatively with biomass factor expansion. BB was estimated with a general model recommended by IP CC. FP between 5 and 25 years stored between 18.6 and 64.4 Mg C ha-1; whereas the AFS captured 85.0 Mg C ha-1 (10-15 years). The mean carbon fixation rate was 1.4 and 4.9 Mg C ha-1 year-1 for FP and AFS, respectively. The results showed the importance of these systems as mitigators of climate change and emphazises the advantages of involving AFS as carbon sinks allowing also the agricultural production. [ABSTRACT FROM AUTHOR]
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- 2018
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11. Impacts of inclusion of time delay in efforts on the dynamics of forestry biomass, concentration of greenhouse gases and elevated temperature.
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Devi, Sapna, Fatma, Reda, and Gupta, Nivedita
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GREENHOUSE gases , *HIGH temperatures , *HOPF bifurcations , *ATMOSPHERIC temperature , *BIOMASS , *MATHEMATICAL models - Abstract
To understand the impacts of efforts applied to increase the density of forestry biomass on the dynamics of forestry biomass, concentration of greenhouse gases and elevated temperature a nonlinear mathematical model is proposed and analysed. The mathematical model involves four dynamical variables namely: the density of forestry biomass, efforts applied to increase the density of forestry biomass, concentration of greenhouse gases and elevated environmental temperature. Since, there is always a time lag between implementation of efforts and its outcome, therefore we extend our model by introducing time delay in efforts. It is found that as delay in efforts crosses a critical value, the delay model loses its stability and undergoes Hopf bifurcation. The stability and direction of Hopf bifurcation are analysed using normal form method and central manifold theory. Numerical simulations are performed to verify and validate our analytical results. It is observed that if efforts are implemented for appropriate time, the density of forestry biomass can be conserved but implementation of efforts with longer time delay has destabilizing effect on the system. Increasing rate of atmospheric temperature due to greenhouse gases, decreases the density of forestry biomass but this decrease can also be maintained by implementation of efforts. Therefore, implementation of efforts for sufficient period of time, plays a very vital role in increasing the density of forestry biomass and decreasing the concentration of greenhouse gases and elevated temperature. • A mathematical model is proposed and analysed to understand the impacts of efforts. • The model involves: forestry biomass, efforts, greenhouse gases and temperature. • Positivity, boundedness and local stability of the system is discussed. • The stability and direction of Hopf bifurcation are studied for delay model. • The analytical results are validated with the help of numerical simulations. [ABSTRACT FROM AUTHOR]
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- 2023
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12. Biomass quality control in power plants: Technical and economical implications.
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Hernández, Juan J., Lapuerta, Magín, Monedero, Esperanza, and Pazo, Amparo
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BIOMASS & the environment , *FOSSIL fuels & the environment , *MOISTURE content of plants , *FOSSIL fuels , *LIGNOCELLULOSE , *PRICES - Abstract
The consumption of forestry biomass for energy uses is a promising alternative to fossil fuels since it provides different environmental, economic and social benefits to the countryside. A cost-effective methodology is presented in order to establish the biomass price, consistently with its quality. The methodology commonly used in power plants is based exclusively on its estimated heating value, calculated from reference data and measured moisture content. This work analyses the economic benefits of using more accurate heating values determined from other biomass properties, thus requiring additional analyses. Results show that the biomass ash content is the most significant parameter affecting the heating value (a decrease of 760 kJ/kg has been obtained for an ash content increase of 3.7% with respect to reference fuel). The rest of parameters studied (harvesting season and biomass origin) lead to differences below 575 kJ/kg. Considering the increase in the fuel cost from additional analysis, the methodology based on measuring the higher heating value and the moisture content is the most appropriate technique to optimize the cost-benefit ratio of the plant. This technique is even more cost-effective when the frequency of analysis is reduced and the laboratory is shared with other plants from the same company. [ABSTRACT FROM AUTHOR]
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- 2018
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13. Avaliação do potencial fertilizante de dois resíduos da indústria florestal Assessement of two residues from forestry industry as fertilizers
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Carmo Horta, Samuel Lupi, Ofélia Anjos, and José Almeida
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Biomassa florestal ,cinza ,fertilização ,resíduo da causticação da pasta de papel ,resíduos ,Ashes ,causticizing lime mud ,fertilization ,forestry biomass ,residues ,Agriculture - Abstract
A indústria florestal produz resíduos com características e potenciais de utilização muito distintos. Por um lado, a queima de biomassa florestal para obtenção de energia conduz à produção de grandes quantidades de cinzas como produto final e, por outro lado, durante o processo de produção da pasta de papel e na sequência do tratamento por causticação é também produzido um resíduo em quantidades significativas. O objectivo deste trabalho foi avaliar o potencial fertilizante destes dois resíduos, ou seja, das cinzas provenientes da incineração de biomassa florestal e das cinzas provenientes da causticação da pasta de papel, resíduos provenientes da indústria florestal. Num ensaio em vasos estudou-se a resposta do azevém à aplicação de doses crescentes destes resíduos que corresponderiam à aplicação ao solo de 0, 0,5, 1, 3 e 5 toneladas por ha. Verificou-se que a cinza de biomassa florestal pode ser aplicada ao solo, não se observando efeitos negativos na produção ou propriedades do solo. Esta aplicação conduzirá ao fornecimento de alguns nutrientes, nomeadamente K e Ca. Em solos com relação Ca/Mg elevada aconselha-se a aplicação simultânea de Mg. O resíduo proveniente da causticação da pasta de papel, deve ser incorporado no solo com antecedência relativamente à sementeira devido à sua causticidade. Nas culturas plurianuais não deverá ser utilizado. Apresentou valor como correctivo alcalinizante, possuindo elevado teor em Na que conduziu a um aumento significativo da condutividade eléctrica e do Na de troca, não se aconselhando uma aplicação em quantidades superiores a 1 t/ha.Forestry industry originates residues with distinct properties which can have also differences in its management reutilization. This study aimed at evaluating the fertilizer potential of forestry biomass burning ashes and causticizing lime mud from pulp and paper industry process, which are both residues from forestry industries. In a pot trial we evaluated the effect on ryegrass biomass production and on soil properties due to soil application of increasing amounts of the two forestry industry residues. These amounts corresponds to soil incorporation of 0, 0.5, 1, 3 and 5 t per ha of the residues. It was observed that ashes from biomass burning can be applied to soil without any negative effects, neither on productivity, nor on soil proprieties. This residue might supply some nutrients as K and Ca. In the case of soils with a high Ca to Mg ratio the simultaneous supply of ashes and Mg might be necessary. The other residue (causticizing lime mud) should be incorporated into soil long before seeding, due to its caustic effect. It should not be applied on perennial crops. As a fertilizer it might be used for alkali effect. As it has high Na content it induced a significant increase in electrical conductivity and exchangeable Na. Therefore, its application to soil should not be higher than 1 t per ha.
- Published
- 2010
14. Heat transfer during forest biomass particles drying in an agitated fluidised bed.
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Moreno, Rogelio M., Antolín, Gregorio, and Reyes, Alejandro E.
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FOREST biomass , *HEAT convection , *FLUIDIZED bed reactors , *TEMPERATURE effect , *REYNOLDS number , *NUSSELT number - Abstract
The phenomenon of convective heat transfer between gas and biomass particles during the drying process of fluidised bed material was analysed in order to obtain the heat transfer coefficients between the gas and the particle surface. In order to promote high homogeneity of the particles suspension, the bed was mechanically stirred, to obtain a uniform temperature inside the bed. The results showed a correlation between, the Nusselt and Reynolds numbers, which predicts the surface heat transfer coefficient with a deviation of ±15%, in relation to the experimental data. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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15. Reserva de carbono en biomasa forestal y suelos minerales en el Parque Nacional Malinche (México).
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Valdez Pérez, María Eugenia, González Guerrero, Gandhi, Morales Ibarra, Rafael, and Bolaños Suárez, Rut Yadira
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The protected natural areas represent one of the strategies for the mitigation of climate change. The aim of this research consists of estimating the carbon content in forestry biomass found in mineral soils and calculating the carbon losses due to changes in soil use in the Park (PNM). The surface area of the Park (PNM) is 17.496,34 ha and houses 1.544,377,66 mg in Wood and 4.148,958,97 mg in soil. To estimate the content of forestry biomass allometric equations were applied and work was done with the cartography of the INEGI (National Institute of Statistics and Geography) in the spacetemporal analysis of the changes in soil use. For soil carbon the values of IPCC (Intergovernmental Panel of Climate Change) were applied. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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16. Caracterização energética de pellets in natura e torrificados produzidos com madeira residual de Pinus.
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de Paula Protásio, Thiago, Trugilho, Paulo Fernando, Fauller de Siqueira, Humberto, Alves de Melo, Isabel Cristina Nogueira, Rogério Andrade, Carlos, and Guimarães Junior, José Benedito
- Abstract
The objective of this research was to evaluate torrified and fresh pellets produced from Pinus waste wood, used for direct generation of thermal energy. The compaction of Pinus sp. waste wood from lumbermill was performed in a pelletizer with a planar array of 8 mm. Roastings were performed in an electric furnace, type muffle, stabilized at final temperatures of 220 °C and 250 °C for 30 min. The following pellets properties were determined: apparent and unit energy density, bulk density, energy bulk density, immediate chemical composition (volatile materials, ash and fixed carbon), high heating value and moisture. It was observed an increase in high heating value and reduction of moisture content of torrified pellets. However, the gain in calorific value was less than the mass loss of the pellets after roasting, reducing the energy densities of the pellets. The pellets raw have marketing potential in European countries such as Germany, Austria and Sweden. The methodology used for roasting is not suitable for pellets heat treatment. However, further research on pellet roasting in a wider temperature and residence time range is recommended, in order to define parameters that optimize their energetic properties. [ABSTRACT FROM AUTHOR]
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- 2015
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17. Comparative study on pyrolysis and gasification within CO2 atmosphere of typical forestry biomass in Northeast Asia: Thermal behavior and kinetic analysis.
- Author
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Wang, Bo, Xu, Fanfan, Wang, Xin, Li, Jun, Song, Yongyi, Qiao, Yingyun, and Tian, Yuanyu
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CHAR , *ATMOSPHERIC carbon dioxide , *BEHAVIORAL assessment , *FOREST biomass , *FORESTS & forestry , *PYROLYSIS , *ACTIVATION energy - Abstract
• The pyrolysis behavior of typical forestry biomass in Northeast Asia is close. • The char gasification reactivity of Salicaceae is better than that of Pinaceae. • The gasification activation energy for samples is between 154.18 and 187.66 kJ/mol. The present study provides a comprehensive comparative investigation on feedstock pyrolysis and char gasification performance of typical forestry biomass obtained from Northeast Asia. Firstly, the physicochemical properties were tested and compared in detail. Then, the pyrolysis experiments were carried out on a thermogravimetric analyzer (TGA), which indicated that different forestry biomass has close thermal decomposition characteristics. The initial thermal degradation temperature of different forest biomass varied in 246.18–316.34 °C, and the temperature of maximum reaction rate was between 366.14 °C and 386.70 °C. The slight discrepancy stemmed from the difference in the ash composition and chemical composition. Next, the isothermal char gasification experiment in the CO 2 atmosphere was also conducted at TGA, which can be found that all char were completely gasified within 25 min when the temperature exceeded 950 °C. The gasification results showed that the reactivity of Salicaceae char is better than that of Pinaceae char because of high AAEMs content and alkali index. After that, the reaction apparent activation energy (E a) was calculated by the isoconversional method, the average E a value for different forestry biomass was between 154.18 and 187.66 kJ/mol. In addition, the E a at different conversion rates and the average value of Salicaceae char is lower than that of Pinaceae char. Through comparison, it is found that the pyrolysis and char gasification performance of Salicaceae is better than that of Pinaceae since its relatively high AAEMs content and different chemical composition. [ABSTRACT FROM AUTHOR]
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- 2022
- Full Text
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18. Depletion and Conservation of Forestry Resources: A Mathematical Model.
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Misra, A. and Lata, Kusum
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A mathematical model to study the depletion and conservation of forestry biomass in presence of industrialization is proposed and analyzed. In the modeling process, it is assumed that due to forestry biomass industries migrate in the region under consideration and their growth increases due to the availability of forestry biomass. It is also assumed that both the intrinsic growth rate and carrying capacity of forestry biomass depend on industrialization and technological efforts. The model analysis shows that the increase in carrying capacity of forestry biomass due to technological efforts has destabilizing effect. It is found that, by taking growth rate coefficient of carrying capacity of forestry biomass due to technological efforts as a bifurcation parameter, periodic solutions may arise through Hopf-bifurcation. Further, using center manifold theory, the direction and stability of periodic solutions have also been discussed. Numerical simulation is performed to support analytic results. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
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19. Preservation of the Forestry Biomass and Control of Increasing Atmospheric CO2 using Concept of Reserved Forestry Biomass
- Author
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Devi, Sapna and Mishra, Rameshwar Prasad
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- 2020
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20. Exportação de carbono e nutrientes pela colheita de Acacia mearnsii De Wild aos quatro anos de idade na Depressão Central, RS.
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Caldeira, Marcos Vinicius Winckler, de Oliveira Godinho, Tiago, Fleig Saidelles, Fabio Luiz, Viera, Márcio, Schumacher, Mauro Valdir, and Castro, Kallil Chaves
- Subjects
- *
ACACIA mearnsii , *TRACE elements in plant nutrition , *EFFECT of carbon on plants , *PLANT nutrients , *NUTRIENT cycles - Abstract
The aim of this study was to estimate the content and export of carbon, macro and micronutrients in the different components (leaf, alive and dead branch, bark, wood and roots) of the Acacia mearnsii trees with 4 years old of age in Arroio dos Ratos-RS, in order to provide the forest management, based on the criterion of minimum export of nutrients. After determining the diameter distribution and its division into diameter classes (seven classes), three trees were selected in each classes. Using the 21 trees felled, the biomass of different components of trees was estimated. It was observed that wood, which represents about 64% of the biomass, contains 50% of accumulated Ca, 21% N, 27% P, 30% K, 37% Mg, 45% of S, 25% B, 37% Cu, 9% Fe, 26% Mg and 41% Zn. While the leaf, which represents 3% of total biomass, contains 20; 18; 12; 5; 10; 10; 17; 18; 5; 19 and 6% N, P, K, Ca, Mg, S, B, Cu, Fe, Mg and Zn, respectively. The export of nutrients from the crops of A. mearnsii can be minimized with retention of crop residues on the soil removal only of wood and bark. [ABSTRACT FROM AUTHOR]
- Published
- 2014
21. Extraction of antioxidants from forestry biomass: Kinetics and optimization of extraction conditions
- Author
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Piwowarska, Natalia and González-Alvarez, Julia
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ANTIOXIDANTS , *BIOMASS , *FORESTS & forestry , *MATHEMATICAL optimization , *GALICIANS (Spain) , *METHANOL , *PHENOLS - Abstract
Abstract: Forestry biomass, generated as result of forest operations and cleaning of the Galician (NW Spain) mountains, was studied as a potential source of natural antioxidants. The main goals of present work were to determine the optimal conditions for the extraction of antioxidant compounds from the forestry biomass using aqueous solutions of methanol and to investigate the antioxidant capacity of extracts obtained. At first, several preliminary extraction experiments were conducted to study the kinetics of extraction process under selected conditions (50% aqueous solution of methanol at 25, 50 or 75 °C). The experimental results were fitted to Peleg’s, Elovich’s and Page’s kinetic models. The Peleg’s model was proved to be the best to describe the kinetics of extraction process. In a second stage experiments were planned according to an incomplete 33 factorial experimental design to analyse the influence of operational conditions on total phenols content and FRAP (Ferric Reducing Antioxidant Power), ABTS (2,2′-azino-di(3-ethylbenzothiazoline-6-sulfonic acid)) and DPPH (2,2-diphenyl-1-picrylhydrazyl) antioxidant capacity of extracts. The examined conditions were as follows: temperature (25–50–75 °C), time (5–55–105 min) and methanol concentration (10–50–90%). The highest temperature assayed (75 °C), a moderate solvent concentration (50%) and an extraction time of 55 min were selected as the optimum extraction conditions using the response surface methodology. The following compounds were identified in the extract obtained under optimum conditions: monogalloyl glucose, digalloyl glucose, (−)-gallic acid, (−)-epicatechin, (+)-catechin, ellagic acid and quercetin 3-O-rhamnoside. [Copyright &y& Elsevier]
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- 2012
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22. Integrated Assessment of forest bioenergy systems in Mediterranean basin areas: The case of Catalonia and the use of participatory IA-focus groups
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Puy, Neus, Tàbara, David, Bartrolí Molins, Jordi, Bartrolí Almera, Jordi, and Rieradevall, Joan
- Subjects
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BIOMASS energy , *FOREST biomass - Abstract
Abstract: The present paper applies and adapts the methodology of integrated assessment focus groups (IA-FGs) in order to understand and analyse the enhancing factors, as well as the constraints which drive or limit the take-off and development of sustainable forest biomass energy systems in a selected large forested area of the Mediterranean basin. Our study provides both quantitative and qualitative data from Catalonia, Northeast Spain. We provide historical trends in forest expansion; an assessment of technological, socio-economic and ecological options of forest management; and plausible scenarios of its future evolution. Results show that while the opportunities and stakes are high, in Mediterranean countries, specific socio-ecologic factors need to be taken into account if forest biomass is to contribute decisively to securing renewable sources of energy in Europe, integrating landscape planning with resource policies or mitigating climate change. Among these key factors identified are property regimes, low productivity of Mediterranean forests and weak institutional capacity. Other elements such as logistics and supply difficulties and the lack of economic profitability of forest products constitute limitations identified in the implementation of bioenergy systems. Technological solutions alone, while important, are insufficient to ensure a prominent role of Southern Europe forest biomass management in the climate, landscape and sustainability energy policy challenge. [Copyright &y& Elsevier]
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- 2008
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23. Chemical elemental characteristics of biomass fuels in China
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Cuiping, Liao, Chuangzhi, Wu, Yanyongjie, and Haitao, Huang
- Subjects
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BIOMASS , *CROP residues , *ORYZA , *MALVACEAE - Abstract
This paper investigates the chemical elemental characteristics of 63 samples of biomass including agricultural biomass such as rice straw, wheat straw, corn straw, cotton straw and forestry biomass such as birch, spruce, willow, etc. in China. Twenty one different biomass groups are distinguished as reference fuels in China. The elemental characteristics of bituminous coal are also presented for comparison. [Copyright &y& Elsevier]
- Published
- 2004
- Full Text
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24. Data and non-linear models for the estimation of biomass growth and carbon fixation in managed forests
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Albers, Ariane, Collet, Pierre, Benoist, Anthony, and Hélias, Arnaud
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Carbon fixation ,Environmental Science ,Non-linear growth ,Biogenic carbon modelling ,lcsh:R858-859.7 ,Forestry biomass ,lcsh:Computer applications to medicine. Medical informatics ,lcsh:Science (General) ,lcsh:Q1-390 - Abstract
The data and analyses presented support the research article entitled “Coupling partial-equilibrium and dynamic biogenic carbon models to assess future transport scenarios in France” (Albers et al., 2019). Carbon sequestration and storage in forestry products (e.g. transport fuels) is sought as a climate change mitigation option. The data presented support and inform dynamic modelling approaches to predict biomass growth and carbon fixation dynamics, of a tree or forest stand, over specific rotation lengths. Data consists of species-specific yield tables, parameters for non-linear growth models and allometric equations. Non-linear growth models and allometric equations are listed and described. National statistics and surveys of the wood supply chain serve to identify main tree species, standing wood volumes and distributions within specific geographies; here corresponding to managed forests in France. All necessary data and methods for the computation of the annual fixation flows are presented. Keywords: Biogenic carbon modelling, Carbon fixation, Forestry biomass, Non-linear growth
- Published
- 2019
25. Data and non-linear models for the estimation of biomass growth and carbon fixation in managed forests
- Author
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Helias, Arnaud, Collet, Pierre, Benoist, Anthony, Elias, Arnaud, Albers, Ariane, Laboratoire de Biotechnologie de l'Environnement [Narbonne] (LBE), Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA), Pôle ELSA, Environmental Life Cycle and Sustainability Assessment (ELSA), Technische Universität Berlin (TUB), IFP Energies nouvelles (IFPEN), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Institut National de la Recherche Agronomique (INRA)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), and Technische Universität Berlin (TU)
- Subjects
[SDV.SA.SF]Life Sciences [q-bio]/Agricultural sciences/Silviculture, forestry ,Carbon fixation ,Non-linear growth ,Biogenic carbon modelling ,Forestry biomass ,[SDE.ES]Environmental Sciences/Environmental and Society - Abstract
International audience; The data and analyses presented support the research article entitled "Coupling partial-equilibrium and dynamic biogenic carbon models to assess future transport scenarios in France" (Albers et al., 2019). Carbon sequestration and storage in forestry products (e.g. transport fuels) is sought as a climate change mitigation option. The data presented support and inform dynamic modelling approaches to predict biomass growth and carbon fixation dynamics , of a tree or forest stand, over specific rotation lengths. Data consists of species-specific yield tables, parameters for non-linear growth models and allometric equations. Non-linear growth models and allometric equations are listed and described. National statistics and surveys of the wood supply chain serve to identify main tree species, standing wood volumes and distributions within specific geographies; here corresponding to managed forests in France. All necessary data and methods for the computation of the annual fixation flows are presented.
- Published
- 2019
- Full Text
- View/download PDF
26. Avaliação do potencial fertilizante de dois resíduos da indústria florestal
- Author
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Horta, Carmo, Lupi, Samuel, Ofélia Anjos, and Almeida, José
- Subjects
residues ,cinza ,fertilization ,resíduo da causticação da pasta de papel ,forestry biomass ,causticizing lime mud ,fertilização ,Ashes ,Biomassa florestal ,resíduos - Abstract
A indústria florestal produz resíduos com características e potenciais de utilização muito distintos. Por um lado, a queima de biomassa florestal para obtenção de energia conduz à produção de grandes quantidades de cinzas como produto final e, por outro lado, durante o processo de produção da pasta de papel e na sequência do tratamento por causticação é também produzido um resíduo em quantidades significativas. O objectivo deste trabalho foi avaliar o potencial fertilizante destes dois resíduos, ou seja, das cinzas provenientes da incineração de biomassa florestal e das cinzas provenientes da causticação da pasta de papel, resíduos provenientes da indústria florestal. Num ensaio em vasos estudou-se a resposta do azevém à aplicação de doses crescentes destes resíduos que corresponderiam à aplicação ao solo de 0, 0,5, 1, 3 e 5 toneladas por ha. Verificou-se que a cinza de biomassa florestal pode ser aplicada ao solo, não se observando efeitos negativos na produção ou propriedades do solo. Esta aplicação conduzirá ao fornecimento de alguns nutrientes, nomeadamente K e Ca. Em solos com relação Ca/Mg elevada aconselha-se a aplicação simultânea de Mg. O resíduo proveniente da causticação da pasta de papel, deve ser incorporado no solo com antecedência relativamente à sementeira devido à sua causticidade. Nas culturas plurianuais não deverá ser utilizado. Apresentou valor como correctivo alcalinizante, possuindo elevado teor em Na que conduziu a um aumento significativo da condutividade eléctrica e do Na de troca, não se aconselhando uma aplicação em quantidades superiores a 1 t/ha., Revista de Ciências Agrárias, vol. 33 n.º 2 (2010)
- Published
- 2018
27. Carbon reserve in forestry biomass and mineral soils in Parque Nacional Malinche (Mexico)
- Author
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Valdez Pérez, María Eugenia, González Guerrero, Gandhi, Morales Ibarra, Rafael, and Bolaños Suárez, Rut Yadira
- Subjects
biomasa forestal ,biomassa florestal ,Malinche ,solos minerais ,forestry biomass ,carbon ,natural area ,mineral soils ,suelos minerales ,área natural ,carbono - Abstract
Las áreas naturales protegidas representan una de las estrategias para la mitigación del cambio climático. El objetivo de esta investigación consistió en estimar el contenido de carbono en biomasa forestal en suelos minerales y calcular las pérdidas de carbono por cambios de uso del suelo en el Parque Nacional Malinche (PNM). La superficie de bosque del PNM es de 17.496,34 ha y almacena 1.544.377,66 mg en bosque y 4.148.985,97 mg en suelos. Para estimar el contenido de biomasa forestal se aplicaron ecuaciones alométricas y se trabajó con la cartografía del Instituto Nacional de Estadística y Geografía (INEGI) en el análisis espacio-temporal de los cambios de uso de suelo. Para el carbono en suelos se aplicaron los valores del Panel Intergubernamental de Cambio Climático (IPCC). As áreas naturais protegidas representam uma das estratégias para a mitigação da mudança climática. O objetivo desta pesquisa consistiu em estimar o conteúdo de carbono em biomassa florestal em solos minerais e calcular as perdas de carbono por mudanças de uso do solo no Parque Nacional Malinche (PNM). A superfície da floresta do PNM é de 17.496,34 ha e armazena 1.544.377,66 mg em floresta e 4.148.985,97 mg em solos. Para estimar o conteúdo de biomassa florestal, aplicaramse equações alométricas e trabalhou-se com a cartografia do Instituto Nacional de Estatística e Geografia (Inegi) na análise espaço-temporal das mudanças de uso do solo. Para o carbono em solos, aplicaram-se os valores do Painel Intergovernamental sobre Mudança do Clima (IPCC, por sua sigla em inglês). The protected natural areas represent one of the strategies for the mitigation of climate change. The aim of this research consists of estimating the carbon content in forestry biomass found in mineral soils and calculating the carbon losses due to changes in soil use in the Park (PNM). The surface area of the Park (PNM) is 17.496,34 ha and houses 1.544,377,66 mg in Wood and 4.148,958,97 mg in soil. To estimate the content of forestry biomass allometric equations were applied and work was done with the cartography of the INEGI (National Institute of Statistics and Geography) in the spacetemporal analysis of the changes in soil use. For soil carbon the values of IPCC (Intergovernmental Panel of Climate Change) were applied.
- Published
- 2016
28. Reserva de carbono en biomasa forestal y suelos minerales en el Parque Nacional Malinche (México)
- Author
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Rut Yadira Bolaños Suárez, Maria Eugenia Valdez Perez, Gandhi González Guerrero, and Rafael Morales Ibarra
- Subjects
0106 biological sciences ,Total organic carbon ,biomassa florestal ,biomasa forestal ,Malinche ,9 Geografía e Historia / History and geography ,forestry biomass ,carbon ,Geography, Planning and Development ,lcsh:G1-922 ,Forestry ,Natural area ,Environmental Science (miscellaneous) ,carbono ,010603 evolutionary biology ,01 natural sciences ,solos minerais ,Earth and Planetary Sciences (miscellaneous) ,Environmental science ,mineral soils ,área natural ,suelos minerales ,lcsh:Geography (General) ,010606 plant biology & botany - Abstract
Las áreas naturales protegidas representan una de las estrategias para la mitigación del cambio climático. El objetivo de esta investigación consistió en estimar el contenido de carbono en biomasa forestal en suelos minerales y calcular las pérdidas de carbono por cambios de uso del suelo en el Parque Nacional Malinche (PNM). La superficie de bosque del PNM es de 17.496,34 ha y almacena 1.544.377,66 mg en bosque y 4.148.985,97 mg en suelos. Para estimar el contenido de biomasa forestal se aplicaron ecuaciones alométricas y se trabajó con la cartografía del Instituto Nacional de Estadística y Geografía (INEGI) en el análisis espacio-temporal de los cambios de uso de suelo. Para el carbono en suelos se aplicaron los valores del Panel Intergubernamental de Cambio Climático (IPCC). The protected natural areas represent one of the strategies for the mitigation of climate change. The aim of this research consists of estimating the carbon content in forestry biomass found in mineral soils and calculating the carbon losses due to changes in soil use in the Park (PNM). The surface area of the Park (PNM) is 17.496,34 ha and houses 1.544,377,66 mg in Wood and 4.148,958,97 mg in soil. To estimate the content of forestry biomass allometric equations were applied and work was done with the cartography of the INEGI (National Institute of Statistics and Geography) in the space- temporal analysis of the changes in soil use. For soil carbon the values of IPCC (Intergovernmental Panel of Climate Change) were applied. As áreas naturais protegidas representam uma das estratégias para a mitigação da mudança climática. O objetivo desta pesquisa consistiu em estimar o conteúdo de carbono em biomassa florestal em solos minerais e calcular as perdas de carbono por mudanças de uso do solo no Parque Nacional Malinche (PNM). A superfície da floresta do PNM é de 17.496,34 ha e armazena 1.544.377,66 mg em floresta e 4.148.985,97 mg em solos. Para estimar o conteúdo de biomassa florestal, aplicaram- se equações alométricas e trabalhou-se com a cartografia do Instituto Nacional de Estatística e Geografia (Inegi) na análise espaço-temporal das mudanças de uso do solo. Para o carbono em solos, aplicaram-se os valores do Painel Intergovernamental sobre Mudança do Clima (IPCC, por sua sigla em inglês).
- Published
- 2016
29. Caracterização energética de pellets in natura e torrificados produzidos com madeira residual de Pinus
- Author
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Protásio, Thiago de Paula, Trugilho, Paulo Fernando, de Siqueira, Humberto Fauller, de Melo, Isabel Cristina Nogueira Alves, Andrade, Carlos Rogério, and Guimarães Junior, José Benedito
- Subjects
Energy ,Tratamento térmico ,Densification ,Densificação ,Forestry biomass ,Energia ,Heat treatment ,Biomassa florestal - Abstract
he objective of this research was to evaluate torrified and fresh pellets produced from Pinus waste wood, used for direct generation of thermal energy. The compaction of Pinus sp. waste wood from lumbermill was performed in a pelletizer with a planar array of 8 mm. Roastings were performed in an electric furnace, type muffle, stabilized at final temperatures of 220 °C and 250 °C for 30 min. The following pellets properties were determined: apparent and unit energy density, bulk density, energy bulk density, immediate chemical composition (volatile materials, ash and fixed carbon), high heating value and moisture. It was observed an increase in high heating value and reduction of moisture content of torrified pellets. However, the gain in calorific value was less than the mass loss of the pellets after roasting, reducing the energy densities of the pellets. The pellets raw have marketing potential in European countries such as Germany, Austria and Sweden. The methodology used for roasting is not suitable for pellets heat treatment. However, further research on pellet roasting in a wider temperature and residence time range is recommended, in order to define parameters that optimize their energetic properties. O objetivo deste estudo foi avaliar pellets torrificados e in natura,produzidos a partir da madeira residual de Pinus, destinados ao uso bioenergético. A compactação da madeira residual de Pinus sp. oriunda de serraria foi realizada em uma peletizadora com matriz plana de 8 mm. As torrefações foram realizadas em forno elétrico, tipo mufla, estabilizado em temperaturas finais de 220 °C e 250 °C por 30 min. Foram determinadas as seguintes propriedades nos pellets: densidades aparente e energética unitárias, densidades a granel e energética do granel, composição química imediata (materiais voláteis, cinzas e carbono fixo), poder calorífico superior e umidade. Observou-se aumento do poder calorífico superior e redução do teor de umidade nos pellets torrificados, contudo, o ganho em valor calórico foi inferior à perda de massa dos pellets após a torrefação, reduzindo assim a densidade energética dos pellets. Os pellets in natura apresentam potencial de comercialização em países europeus, como Alemanha, Áustria e Suécia. A metodologia utilizada para torrefação não é indicada para o tratamento térmico de pellets. Porém, recomendam-se novas pesquisas sobre torrefação de pellets em uma faixa mais ampla de temperatura e tempo de residência, visando determinar parâmetros que otimizem as propriedade energéticas.
- Published
- 2015
30. Проблемы заготовки древесной щепы
- Author
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Самылин, А. А., Самилін, О. О., Цивенкова, Н. М., Samylin, A., Tsyvenkova, N., Самылин, А. А., Самилін, О. О., Цивенкова, Н. М., Samylin, A., and Tsyvenkova, N.
- Abstract
У статті проведений короткий аналіз можливостей поліпшення організації лісозаготівельного виробництва з метою максимального використання лісових ресурсів та продуктів їх переробки, а також можливостей підвищення економічної ефективності лісозаготівельних робіт. Розглянуто технологію організації проміжних складів паливних цурок як методу зниження собівартості їх виробництва за рахунок ліквідації тривалих простоїв автоцурковозів. Описана технологія використання пересувних високопродуктивних вирубувальних машин і малих технологічних комплексів на їх базі для попередньої обробки цурок. Виділено основні напрями використання паливних цурок як у виробничих масштабах, так і для потреб дрібних фермерських господарств., The article gives a brief analysis of opportunities for improving the organization of timber production in order to maximize the use of forest resources and products, as well as opportunities to improve the economic efficiency of harvesting operations. The technology of the organization of intermediate storage of wood chips as a method of reducing the cost of production by eliminating extended downtimes chip trucks. The technology of using high-performance mobile chippers and small technological complexes on their basis for the pre-treatment of wood chips. The basic directions of use of wood chips as a fuel on an industrial scale, and for the needs of small farmers., В статье проведен краткий анализ возможностей улучшения организации лесозаготовительного производства с целью максимального использования лесных ресурсов и продуктов их переработки, а также возможностей повышения экономической эффективности лесозаготовительных работ. Рассмотрена технология организации промежуточных складов топливной щепы как метода снижения себестоимости ее производства за счет ликвидации длительных простоев автощеповозов. Описана технология использования передвижных высокопроизводительных рубильных машин и малых технологических комплексов на их базе для предварительной обработки щепы. Выделены основные направления использования топливной щепы как в производственных масштабах, так и для нужд мелких фермерских хозяйств.
- Published
- 2016
31. Проблемы заготовки древесной щепы для энергетических целей
- Author
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Цивенкова, Н. М., Самылин, А. А., Tsyvenkova, N., Samylin, A., Самилін, О. О., Цивенкова, Н. М., Самылин, А. А., Tsyvenkova, N., Samylin, A., and Самилін, О. О.
- Abstract
У статті проведений короткий аналіз можливостей поліпшення організації лісозаготівельного виробництва з метою максимального використання лісових ресурсів та продуктів їх переробки, а також можливостей підвищення економічної ефективності лісозаготівельних робіт. Розглянуто технологію організації проміжних складів паливних цурок як методу зниження собівартості їх виробництва за рахунок ліквідації тривалих простоїв автоцурковозів. Описана технологія використання пересувних високопродуктивних вирубувальних машин і малих технологічних комплексів на їх базі для попередньої обробки цурок. Виділено основні напрями використання паливних цурок як у виробничих масштабах, так і для потреб дрібних фермерських господарств., The article gives a brief analysis of opportunities for improving the organization of timber production in order to maximize the use of forest resources and products, as well as opportunities to improve the economic efficiency of harvesting operations. The technology of the organization of intermediate storage of wood chips as a method of reducing the cost of production by eliminating extended downtimes chip trucks. The technology of using high-performance mobile chippers and small technological complexes on their basis for the pre-treatment of wood chips. The basic directions of use of wood chips as a fuel on an industrial scale, and for the needs of small farmers., В статье проведен краткий анализ возможностей улучшения организации лесозаготовительного производства с целью максимального использования лесных ресурсов и продуктов их переработки, а также возможностей повышения экономической эффективности лесозаготовительных работ. Рассмотрена технология организации промежуточных складов топливной щепы как метода снижения себестоимости ее производства за счет ликвидации длительных простоев автощеповозов. Описана технология использования передвижных высокопроизводительных рубильных машин и малых технологических комплексов на их базе для предварительной обработки щепы. Выделены основные направления использования топливной щепы как в производственных масштабах, так и для нужд мелких фермерских хозяйств.
- Published
- 2016
32. Pour une renaissance planifiée et globale de l’écoumène agro-forestier régional québécois
- Author
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Gille Tremblay and Jean Désy
- Subjects
scénarios de valorisation ,Social Sciences and Humanities ,ways of wood processing ,écoumène forestier et agro-forestier ,Geography, Planning and Development ,Sciences Humaines et Sociales ,filière de transformation du bois ,Forestry biomass ,forestry and agro-forestry hinterland ,Biomasse forestière ,regional strategic planification ,development scenario ,planification stratégique régionale - Abstract
Devant les effets inévitables d'une exploitation minière et monovalente des forêts du Québec méridional, du moins jusqu'à récemment, il devient urgent d'explorer et de gérer plus humainement et plus naturellement l'écoumène forestier et agro-forestier entourant les régions ressources. C'est l'ambition de cet article de proposer une utilisation beaucoup plus judicieuse de la biomasse forestière par le vecteur privilégié de la planification stratégique régionale. D'abord approfondie dans sa dimension théorique, on tentera d'opérationnaliser cette planification dans un scénario alternatif pour l'horizon 2010, utilisant comme matière première la vingtaine de filières de transformation possibles de la biomasse forestière. On décomposera ce scénario jusqu'à la structure d'action prévue pour l'an 2010., Before the unvoidable effects of a monovalent and mining type of forest exploitation in Southern Québec, at least until recently, it becomes urgent to explore and manage more humanly and naturally the forestry and agro-forestry hinterland surrounding resources regions. This paper suggests a much more rational use of forestry biomass, by the privileged way of regional strategic planification. First explained in its theoretical dimension, this explanation is made operational by an alternative scenario for the year 2010, using some 20 ways of processing raw material of the forestry biomass. This scenario is then examined into its major components, up to the operational structure, forecast for this rime period.
- Published
- 2005
- Full Text
- View/download PDF
33. An Evaluation Of Land Use Control In Hokkaido, Japan
- Author
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Kayoko Yamamoto
- Subjects
Forestry Biomass ,Land Use Control ,Hokkaido ,Urbanization ,Geographic Information Systems (GIS) - Abstract
This study focuses on an evaluation of Hokkaido which is the northernmost and largest prefecture by surface area in Japan and particularly on two points: the rivalry between all kinds of land use such as urban land and agricultural and forestry land in various cities and their surrounding areas and the possibilities for forestry biomass in areas other than those mentioned above and grasps which areas require examination of the nature of land use control and guidance through conducting land use analysis at the district level using GIS (Geographic Information Systems). The results of analysis in this study demonstrated that it is essential to divide the whole of Hokkaido into two areas: those within delineated city planning areas and those outside of delineated city planning areas and to conduct an evaluation of each land use control. In delineated urban areas, particularly urban areas, it is essential to re-examine land use from the point of view of compact cities or smart cities along with conducting an evaluation of land use control that focuses on issues of rivalry between all kinds of land use such as urban land and agricultural and forestry land. In areas outside of delineated urban areas, it is desirable to aim to build a specific community recycling range based on forest biomass utilization by conducting an evaluation of land use control concerning the possibilities for forest biomass focusing particularly on forests within and outside of city planning areas., {"references":["Land Use Research Group Compilation (1999) Quick Guide to the\nNational Land Use Planning Act, Taisei Publishing, 134p.","Mizuguchi T.(1997) Land Use Plans and Town Planning - From\nControl and Guidance to Planning Discussions-, Gakugei Shuppansha,\n366p.","Satake G. (1976) Background to the Establishment of the National Land\nUse Planning Act and Future Operational Challenges: Focusing on Land\nUse Master Plans (National Land Use Planning Act), Architecture\nYearbook, 1976, pp.655-657.","Tsukaguchi T.(1989) Study on Change Mechanisms in Land Use\nSystems Involved in Urbanization and Natural Site Condition and Land\nUse Control, Journal of the Japanese Institute of Landscape\nArchitecture, Vol. 52, No.3, pp.166-182.","Nakamura R. and Yoshioka T. (2001) Similarities and Differences\nbetween Prefectural Area Divisions through Land Use Master Plans and\nIndividual Control Laws, Papers on City Planning, No.36, pp. 373-385.","Yamamoto K.(2003) Evaluation of Land Use Control for Land Use\nMaster Plans focusing on the Urbanization of Lake Biwa Basin Area,\nJournal of the Japanese Institute of Landscape Architecture, Vol.66,\nNo.5, pp. 883-888.","Yamamoto K. (2004) Evaluation of Land Use Control focusing on\nOverlap Status between City Planning Areas and Agricultural Promotion\nAreas in the Lake Biwa Basin Area - An Evaluation considering the\nAccessibility of Traffic Facilities-, Papers on Environmental\nInformation Science, No.18, pp.183-188.","Iwamoto Y., Matsukawa T. and Nakaide F.(2009) Study on the\nChallenges and the Nature of implementing Metropolitan Integrated\nLand Use Control -Through the Actual Development of Matsumoto\nUrban Area and the Initiatives of Each Municipality-, Papers on City\nPlanning, No.41, pp.595-600.","Yamamoto K.(2011) Evaluation of Land Use Control in Land Use\nMaster Plans focusing on Urban Area Distribution on the Main Island of\nOkinawa, Journal of the Japanese Institute of Landscape Architecture,\nVol.74, No.5, pp.657-662.\n[10] Yamamoto K.(2006) Land Use Analysis for Environmental\nConservation using GIS, Kokon Publishing, 162p.\n[11] Hokkaido (2010a) Hokkaido Urban Plan, 133p.\n[12] Hokkaido (2010b) 4th Hokkaido Land Use Master Plan, 20p."]}
- Published
- 2012
- Full Text
- View/download PDF
34. Assessment of Forest Aboveground Biomass Stocks and Dynamics with Inventory Data, Remotely Sensed Imagery and Geostatistics
- Author
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José Aranha, Domingos Lopes, and Helder Viana
- Subjects
Biomass (ecology) ,Forest inventory ,010504 meteorology & atmospheric sciences ,0211 other engineering and technologies ,Primary production ,Forestry ,02 engineering and technology ,Geostatistics ,Vegetation ,15. Life on land ,GIS ,01 natural sciences ,Remote Sensing ,Productivity (ecology) ,13. Climate action ,Ecosystem management ,Environmental science ,Ecosystem ,Forestry biomass ,021101 geological & geomatics engineering ,0105 earth and related environmental sciences - Abstract
Several issues, related with forest fires, forest disturbances (Garcia-Martin et al., 2008), forest productivity (Chirici et al., 2007; Palmer et al., 2009), forest changes over time (Hu & Wang, 2008), or the role of forests in the global carbon balance cycle (Hese et al., 2005) are, nowadays, the focus of numerous studies and investigations. All these subjects demand the knowledge about aboveground biomass (AGB) stocks and/or its dynamics. Besides the availability of biomass, the information about the growth of forests is of increasing importance. This variable, which is related with the total biomass growth in a specific ecosystem, is called Net Primary Production (NPP). Annual NPP represents the net amount of carbon captured by plants through photosynthesis each year (Melillo et al., 1993; Cao & Woodward, 1998). In practice, NPP can be defined and measured in terms of either biomass or CO2 exchange (Field et al., 1995). Waring et al. (1998) define NPP as the sum of live biomass periodic increment (ΔB) and dead biomass (losses, e.g. broken branches, fallen leaves) [NPP = ΔB + losses]. NPP is an important ecological variable due to its relevance for accurate ecosystem management and for monitoring the impact of human activity on ecosystems vegetation at a range of spatial scales: local, regional and global (Melillo et al., 1993). It is one of the most complete and complex variables, since it reflects the growth of the entire ecosystem thus avoiding the analysis of only part of its components. NPP provides a complete view of the ecosystem including information, not only from the arboreal stratum, but also from the shrubs and all the litter produced from each stratum. Thus, the significance of NPP not only reflects the complexity of its measurement or estimation, but also its integrative ecological perspective ecosystems. Mapping AGB stocks or NPP with the utmost accuracy and expedite methodologies is therefore a challenge. The need of continuous maps where the phenomenon under study can be individually analysed or used as auxiliary variable in a specific model requires that the spatial predictions are represented in the most accurate way. Over the years different spatial prediction methods have been explored in diverse data type (Isaaks & Srivastava, 1989; Goovaerts, 1997; Labrecque et al., 2006; Sales et al., 2007; Meng et al., 2009). Some approaches have a simple application methodology however others are sometimes complex in what concerns to their implementation, or the selection of the variables to be used.
- Published
- 2011
35. Exportação de carbono e nutrientes pela colheita de Acacia mearnsii De Wild aos quatro anos de idade na Depressão Central, RS
- Author
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Winckler Caldeira, Marcos Vinicius, Oliveira Godinho, Tiago de, Saidelles, Fabio Luiz Fleig, Viera, Márcio, Schumacher, Mauro Valdir, Chaves Castro, Kallil, Winckler Caldeira, Marcos Vinicius, Oliveira Godinho, Tiago de, Saidelles, Fabio Luiz Fleig, Viera, Márcio, Schumacher, Mauro Valdir, and Chaves Castro, Kallil
- Abstract
The aim of this study was to estimate the content and export of carbon, macro and micronutrients inthe different components (leaf, alive and dead branch, bark, wood and roots) of the Acacia mearnsiitrees with 4 years old of age in Arroio dos Ratos-RS, in order to provide the forest management,based on the criterion of minimum export of nutrients. After determining the diameter distributionand its division into diameter classes (seven classes), three trees were selected in each classes. Usingthe 21 trees felled, the biomass of different components of trees was estimated. It was observed thatwood, which represents about 64% of the biomass, contains 50% of accumulated Ca, 21% N, 27% P,30% K, 37% Mg, 45% of S, 25% B, 37% Cu, 9% Fe, 26% Mg and 41% Zn. While the leaf, which represents3% of total biomass, contains 20; 18; 12; 5; 10; 10; 17; 18; 5; 19 and 6% N, P, K, Ca, Mg, S, B, Cu, Fe,Mg and Zn, respectively. The export of nutrients from the crops of A. mearnsii can be minimized withretention of crop residues on the soil removal only of wood and bark., O objetivo do presente trabalho foi estimar o conteúdo e a exportação de carbono e nutrientesna folha, galho vivo e morto, casca, madeira e raiz de Acacia mearnsii com quatro anos deidade, em Arroio dos Ratos, RS, visando fornecer indicações de manejo da floresta, com base nocritério de exportação mínima de nutrientes. Após a determinação da distribuição diamétrica esua divisão em classes de diâmetro (sete classes), foram selecionadas três árvores de cada umadelas. Utilizando-se as 21 árvores abatidas, estimou-se a biomassa dos diferentes componentes dasárvores. Observou-se que a madeira, que representa cerca de 64% da biomassa arbórea, contém50% de Ca acumulado, 21% de N, 27% de P, 30% de K, 37% de Mg, 45% de S, 25% de B, 37% Cu, 9% deFe, 26% de Mg e 41% de Zn. Enquanto que as folhas, representando 3% da biomassa total, contêm20; 18; 12; 5; 10; 10; 17; 18; 5; 19 e 6% de N, P, K, Ca, Mg, S, B, Cu, Fe, Mg e Zn, respectivamente. Aexportação de nutrientes dos cultivos de A. mearnsii pode ser minimizada com a permanência dosresíduos de colheita sobre o solo, retirando apenas de madeira e casca.
- Published
- 2014
36. Проблемы заготовки древесной щепы
- Author
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Samylin, A. and Tsyvenkova, N.
- Subjects
forestry biomass ,wood chips ,superforwarder ,энергоресурсы ,древесная щепа ,біомаса лісова ,основне вирубування ,биомасса лесного происхождения ,суперфорвардер ,основная вырубка ,energy resourses ,енергоресурси ,main deforestation ,деревні цурки - Abstract
У статті проведений короткий аналіз можливостей поліпшення організації лісозаготівельного виробництва з метою максимального використання лісових ресурсів та продуктів їх переробки, а також можливостей підвищення економічної ефективності лісозаготівельних робіт. Розглянуто технологію організації проміжних складів паливних цурок як методу зниження собівартості їх виробництва за рахунок ліквідації тривалих простоїв автоцурковозів. Описана технологія використання пересувних високопродуктивних вирубувальних машин і малих технологічних комплексів на їх базі для попередньої обробки цурок. Виділено основні напрями використання паливних цурок як у виробничих масштабах, так і для потреб дрібних фермерських господарств., The article gives a brief analysis of opportunities for improving the organization of timber production in order to maximize the use of forest resources and products, as well as opportunities to improve the economic efficiency of harvesting operations. The technology of the organization of intermediate storage of wood chips as a method of reducing the cost of production by eliminating extended downtimes chip trucks. The technology of using high-performance mobile chippers and small technological complexes on their basis for the pre-treatment of wood chips. The basic directions of use of wood chips as a fuel on an industrial scale, and for the needs of small farmers., В статье проведен краткий анализ возможностей улучшения организации лесозаготовительного производства с целью максимального использования лесных ресурсов и продуктов их переработки, а также возможностей повышения экономической эффективности лесозаготовительных работ. Рассмотрена технология организации промежуточных складов топливной щепы как метода снижения себестоимости ее производства за счет ликвидации длительных простоев автощеповозов. Описана технология использования передвижных высокопроизводительных рубильных машин и малых технологических комплексов на их базе для предварительной обработки щепы. Выделены основные направления использования топливной щепы как в производственных масштабах, так и для нужд мелких фермерских хозяйств.
- Published
- 2006
37. Проблемы заготовки древесной щепы для энергетических целей
- Author
-
Tsyvenkova, N. and Samylin, A.
- Subjects
биомасса лесного происхождения ,основная вырубка ,forestry biomass ,wood chips ,energy resourses ,энергоресурсы ,енергоресурси ,main deforestation ,древесная щепа ,деревні цурки ,біомаса лісова ,основне вирубування - Abstract
У статті проведений короткий аналіз можливостей поліпшення організації лісозаготівельного виробництва з метою максимального використання лісових ресурсів та продуктів їх переробки, а також можливостей підвищення економічної ефективності лісозаготівельних робіт. Розглянуто технологію організації проміжних складів паливних цурок як методу зниження собівартості їх виробництва за рахунок ліквідації тривалих простоїв автоцурковозів. Описана технологія використання пересувних високопродуктивних вирубувальних машин і малих технологічних комплексів на їх базі для попередньої обробки цурок. Виділено основні напрями використання паливних цурок як у виробничих масштабах, так і для потреб дрібних фермерських господарств., The article gives a brief analysis of opportunities for improving the organization of timber production in order to maximize the use of forest resources and products, as well as opportunities to improve the economic efficiency of harvesting operations. The technology of the organization of intermediate storage of wood chips as a method of reducing the cost of production by eliminating extended downtimes chip trucks. The technology of using high-performance mobile chippers and small technological complexes on their basis for the pre-treatment of wood chips. The basic directions of use of wood chips as a fuel on an industrial scale, and for the needs of small farmers., В статье проведен краткий анализ возможностей улучшения организации лесозаготовительного производства с целью максимального использования лесных ресурсов и продуктов их переработки, а также возможностей повышения экономической эффективности лесозаготовительных работ. Рассмотрена технология организации промежуточных складов топливной щепы как метода снижения себестоимости ее производства за счет ликвидации длительных простоев автощеповозов. Описана технология использования передвижных высокопроизводительных рубильных машин и малых технологических комплексов на их базе для предварительной обработки щепы. Выделены основные направления использования топливной щепы как в производственных масштабах, так и для нужд мелких фермерских хозяйств.
- Published
- 2005
38. High resolution satellite imagery for forestry studies: the beechwood of the Pordenone Mountains (Italy)
- Author
-
MAURO, GIOVANNI, Mauro, G., and Mauro, Giovanni
- Subjects
NDVI ,Pordenone mountains ,Pordenone mountain ,Forestry biomass ,Quickbird ,Forestry bioma - Abstract
In this paper we used high resolution satellite imagery in order to study the Pordenone Mountain forests (Friuli Venezia Giulia - North-East of Italy). Our aim is to develop a method able to estimate wood biomass using a vegetation index (NDVI – Normalized Difference Vegetation Index). In order to do this we analysed a Quickbird satellite image, dated 24 June 2003, and we compared our results with biomass data in weight, cut from two small forest areas.
- Published
- 2004
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