43 results on '"RODRIGUES, Marcos Sales"'
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2. Calcium fertilization strategy to improve production and quality of ‘Tommy Atkins’ mango in semi-arid conditions
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Tenreiro, Igor Gomes Pouso, primary, de Castro Sá, Murilo Henrique, additional, de Souza, Isadora Mororó, additional, da Silva, Kátia Araújo, additional, Cavalcante, Ítalo Herbert Lucena, additional, de Freitas, Sérgio Tonetto, additional, Lima, Augusto Miguel Nascimento, additional, Rodrigues, Marcos Sales, additional, and dos Santos Melo de Sousa, Karla, additional
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- 2023
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3. Spatial analysis of soil salinity in a mango irrigated area in semi-arid climate region
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Rodrigues, Marcos Sales, Alves, David Castro, Cunha, Jailson Cavalcante, Lima, Augusto Miguel Nascimento, Cavalcante, Italo Herbert Lucena, da Silva, Katia Araujo, and de Melo Junior, Julio Cesar Ferreira
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- 2018
4. Fertilization strategies to reduce the formation of stenospermocarpic mango fruits in the semiarid region
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Cavalcante, Ítalo Herbert Lucena, Carvalho, Camila Israela Freire Silva, Lima, Augusto Miguel Nascimento, Silva, Roberto Lustosa, Silva, Kátia Araújo da, and Rodrigues, Marcos Sales
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Yield ,Mineral nutrition ,Nutrição mineral ,Mangifera indica L ,Physiological disorder ,Produtividade ,Desordem fisiológica - Abstract
The mango cultivation has shown considerable losses, due to the intense occurrence of physiological disorders in its fruits, and stenospermocarpy is the main disorder under tropical semiarid conditions. So, the experiment was carried out to evaluate the potential loss of yield of mango cv. Palmer by stenospermocarpy, its relation with the nutritional state of the plant and yield as a function of fertilization strategies. The study was conducted in two experimental areas in the Brazilian semiarid. There is evidence that the leaf contents of phosphorus (P), iron (Fe) and zinc (Zn) influenced the development of stenospermocarpy fruits, associated with high temperature and low relative humidity in the flowering period of the crop. The incidence of fruits affected by stenospermocarpy reaches 90%, with an estimated yield loss of 28.81 Mg ha-1 for the mango cv. Palmer. Resumo A cultura da manga tem apresentado perdas consideráveis, devido à intensa ocorrência de desordens fisiológicas em seus frutos, sendo a estenoespermocarpia a principal desordem nas condições do semiárido tropical. Assim, o experimento foi realizado para avaliar o potencial de perda de produtividade da manga cv. Palmer por estenoespermocarpia, sua relação com o estado nutricional da planta e sua produtividade em função das estratégias de fertilização. O estudo foi realizado em duas áreas experimentais no semiárido brasileiro. Há evidências de que os teores foliares de fósforo (P), ferro (Fe) e zinco (Zn) influenciaram o desenvolvimento comdos frutos estenoespermocárpicos, associados à alta temperatura e baixa umidade relativa, no período de floração da cultura. A incidência de frutos afetados pela estenoespermocarpia chegou a 90%, com perda de produtividade estimada de 28,81 Mg ha-1 para a manga cv. Palmer.
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- 2023
5. Fertigation with nitrogen and humic substances on soil chemical attributes cultivated with west Indian cherry
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Dias, Dayanne do Nascimento, Lima, Augusto Miguel N., Cunha, Jailson Cavalcante, Cavalcante, Ítalo Herbert Lucena, Soares , Emanuelle Mercês Barros, Silva, Kátia Araújo da, Rodrigues, Marcos Sales, and Silva, Talison Souza da
- Abstract
The use of humic substances (HS) in the soil can increase the efficiency of nitrogen fertilizers and contribute to the increment in soil organic matter and plant nutrient availability. Hence, this study aimed to evaluate, in two production cycles, the effect of applying HS and different nitrogen (N) doses on the chemical attributes and organic matter fractions of a soil cultivated with West Indian cherry in the Brazilian semiarid region. The experiment was set up in split plots, arranged in strips with four replicates. The absence or presence of HS using KS100 as the source was tested in the plots, and N fertilization (50; 75; 100; 125 and 150% of the recommended dose), using urea, was tested in the subplots. Soil pH, H+Al, Al3+, and Na+, K+, P, Ca2+, Mg2+, Fe2+, Mn2+ and Zn2+ contents were determined, and cation exchange capacity and bases saturation (V %) in the 0-0.2 and 0.2-0.4 m layers were calculated. Analyses of stocks of total organic carbon and carbon (C) of the humic acid, fulvic acid and humin fractions, and humic substances were performed. It was possible to observe that, in the second production cycle of West Indian cherry, the soils showed higher contents of nutrients available to plants. Increase in N availability did not enable a clear trend in the behavior of chemical attributes and organic C stocks in the soil. Under the studied conditions, KS100 application allowed a reduction in the C stocks of the HS of the soil.
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- 2023
6. CARACTERIZAÇÃO FÍSICO-QUÍMICA DOS PRINCIPAIS BLOCOS CERÂMICOS E AGREGADOS MIÚDOS COMERCIALIZADOS NA RIDE PETROLINA – JUAZEIRO
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Machado, Neiton Silva, primary, Souza, Patrícia de Araújo, additional, Souza, Clériton de, additional, Lima, Deisiele Diniz, additional, Silva, Kátia Araujo da, additional, Galhardo, Cristiane Xavier, additional, Rodrigues, Marcos Sales, additional, and Oliveira, Fábio Freire de, additional
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- 2023
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7. Vis-NIR-SWIR spectroscopy in mapping of soil physical-chemical attributes in areas cultivated with irrigated mango in the Brazilian semi-arid region
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Souza, Patrícia Araujo, primary, Rodrigues, Marcos Sales, additional, Costa, Daniel dos Santos, additional, Silva, Kátia Araújo da, additional, and Lima, Augusto Miguel Nascimento, additional
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- 2023
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8. Fertilization strategies to reduce the formation of stenospermocarpic mango fruits in the semiarid region
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Cavalcante, Ítalo Herbert Lucena, primary, Carvalho, Camila Israela Freire Silva, additional, Lima, Augusto Miguel Nascimento, additional, Silva, Roberto Lustosa, additional, Silva, Kátia Araújo da, additional, and Rodrigues, Marcos Sales, additional
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- 2023
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9. Vegetation cover arrangements in the recovery of degraded areas in the Brazilian semi-arid region: effect on soil chemical and physical properties
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Alves, Jandelson de Oliveira, primary, Rodrigues, Marcos Sales, additional, Rodrigues, Renato Garcia, additional, Silva, Kátia Araújo da, additional, Lima, Augusto Miguel Nascimento, additional, Souza, Patrícia Araujo de, additional, and Moreira, Filipe Bernard Ramos, additional
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- 2022
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10. DISTRIBUIÇÃO ESPACIAL FÚNGICA EM GALPÃO AVÍCOLA DE POSTURA EM DIFERENTES ÉPOCAS DO ANO NA REGIÃO DO VALE DO SUBMÉDIO SÃO FRANCISCO BRASIL.
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MACHADO, Neiton Silva, LOPES, Poliana Moreira, SILVA, Kátia Araujo da, CABRAL, Patrícia Gonçalves Castro, RODRIGUES, Marcos Sales, and MOGAMI, Cristina Akemi
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AIR quality ,MICROORGANISMS - Abstract
Copyright of Nucleus Animalium is the property of Fundacao Educacional de Ituverava 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.)
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- 2023
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11. Spatial analyse of litterfall in a gallery forest/Analise espacial da produtividade de serapilheira em uma mata de galeria
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Aquino, Priscila Sales Rodrigues, Nappo, Mauro Eloi, Rodrigues, Marcos Sales, Pereira, Ismael Martins, Matricardi, Eraldo Aparecido Trondoli, and Pela, Glaucia de Mello
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- 2016
12. Soil sampling optimization using spatial analysis in irrigated mango fields under brazilian semi-arid conditions/ Otimizacao da amostragem de solo usando analise espacial em area de mangueira irrigada nas condicoes semiaridas brasileiras
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da Silva, Katia Araujo, Rodrigues, Marcos Sales, Moreira, Filipe Bernard Ramos, Lira, Airis Layanne Ferreira, Lima, Augusto Miguel Nascimento, and Cavalcante, Italo Herbert Lucena
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- 2020
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13. TERMOGRAFIA E AMBIÊNCIA DE GALPÕES AVÍCOLAS DE POSTURA COM DIFERENTE MATERIAL DE COBERTURA NA REGIÃO DO VALE DO SUBMÉDIO SÃO FRANCISCO.
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MACHADO, Neiton Silva, MARTINS, Ítalo Vandson Alves, LOPES, Poliana Moreira, SILVA, Kátia Araújo da, RODRIGUES, Marcos Sales, and MOGAMI, Cristina Akemi
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AIR speed ,ESTRUS ,GALVANIZED steel ,ELECTRIC conductivity ,POULTRY farming ,ARID regions ,LATENT heat - Abstract
Copyright of Nucleus Animalium is the property of Fundacao Educacional de Ituverava 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.)
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- 2022
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14. Spatial correlation between soil and leaf macronutrients in semiarid Brazilian mango (Mangifera indica L.) fields
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Lira, Aíris Layanne Ferreira, primary, Silva, Kátia Araújo da, additional, Rodrigues, Marcos Sales, additional, Souza, Clerison Gustavo Pereira, additional, Moreira, Filipe Bernard Ramos, additional, and Lima, Augusto Miguel Nascimento, additional
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- 2021
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15. Geostatistics and its potential in Agriculture 4.0
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Rodrigues, Marcos Sales, primary, Castrignanò, Annamaria, additional, Belmonte, Antonella, additional, Silva, Kátia Araújo da, additional, and Lessa, Bruno França da Trindade, additional
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- 2020
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16. Soil sampling optimization using spatial analysis in irrigated mango fields under brazilian semi-arid conditions
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Silva, Kátia Araújo da, primary, Rodrigues, Marcos Sales, additional, Moreira, Filipe Bernard Ramos, additional, Lira, Aíris Layanne Ferreira, additional, Lima, Augusto Miguel Nascimento, additional, and Cavalcante, Ítalo Herbert Lucena, additional
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- 2020
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17. Models for estimating leaf area in the ‘Palmer’ mango
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Santos da Silva Junior, José Luiz, primary, Rodrigues, Marcos Sales, additional, Braga, Gabriella Amaral, additional, and Regis, Ester Silva, additional
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- 2019
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18. Does the irrigated mango cultivation in the semiarid change the Physical and chemical attributes of the soil?
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Santos, Leane Rodrigues dos, primary, Lima, Augusto Miguel Nascimento, additional, Rodrigues, Marcos Sales, additional, Cunha, Jailson Cavalcante, additional, Santos, Laura Paula Araújo dos, additional, Soares, Emanuelle Mercês Barros, additional, Silva, Adriano Victor Lopes da, additional, and Souza, Isadora Mororó de, additional
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- 2019
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19. Does the irrigated mango cultivation in the semiarid change the Physical and chemical attributes of the soil?
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Rodrigues dos Santos, Leane, Lima, Augusto Miguel N., Rodrigues, Marcos Sales, Cunha, Jaílson Cavalcante, Araújo dos Santos, Laura Paula, Mercês Barros Soares, Emanuelle, Lopes da Silva, Adriano Victor, Mororó de Souza, Isadora, Rodrigues dos Santos, Leane, Lima, Augusto Miguel N., Rodrigues, Marcos Sales, Cunha, Jaílson Cavalcante, Araújo dos Santos, Laura Paula, Mercês Barros Soares, Emanuelle, Lopes da Silva, Adriano Victor, and Mororó de Souza, Isadora
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The replacement of native vegetation by crops may result in changes in the chemical and physical attributes of the soil, preventing the sustainability of the agricultural production. Therefore, the aim of this study was to evaluate, in two consecutive years (2014 and 2015), the effect of irrigated mango cultivation in some physical and chemical attributes of the soil in relation to Caatinga in Petrolina-PE, Brazil. In areas under irrigated mango (under the canopy region and the row spacing) and Caatinga (taken as reference), soil samples were collected at the 0-10 and 10-20 cm depths. The chemical and physical analyzes were performed, and were calculated bases sum (BS), cations exchangeable capacity (CEC) and base saturation (V, %). The irrigate mango cultivation (canopy region) increased the macronutrients content (P, K, Ca and Mg), BS and V (%) for both evaluated years at the 0-10 and 10-20 cm depths. In soil under irrigated mango cultivation (under the canopy region and in the row spacing), the macronutrient contents presented a stochastic pattern in the years of 2014 and 2015. The change of land use, from Caatinga to irrigated mango cultivation, does not induce a negative impact in the soil chemical attributes under the adopted management conditions.
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- 2019
20. Evaporative cooling efficiency of pads consisting of vegetable loofah
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Melo Júnior, Júlio César Ferreira de, Martins Bamberg, João Victor, Silva Machado, Neiton, Gomes Caldas, Emanuelly Nadja, Rodrigues, Marcos Sales, Melo Júnior, Júlio César Ferreira de, Martins Bamberg, João Victor, Silva Machado, Neiton, Gomes Caldas, Emanuelly Nadja, and Rodrigues, Marcos Sales
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Brazilian agroindustry has presented constant innovations in the use of equipment and materials, among which are those that generate artificial thermal conditioning inside the zootechnical facilities, through a direct evaporative cooling system (DEC). In order to mitigate the effects of high temperatures associated with low air humidity in buildings in the northeastern region of Brazil, the use of DEC systems is evident. Therefore, DEC’s built with evaporative pads constituted of alternative materials, prove to be an interesting and viable alternative. The aim of this work was to evaluate the cooling efficiency of the evaporative pads constituted of vegetable loofah. The experiment was performed at the Campus de Ciências Agrárias, Federal University of the São Francisco Valley (UNIVASF) in Petrolina, Pernambuco state. The experimental design was in randomized blocks, in a 4x4 factorial scheme, with 13 replicates. Air temperature and relative humidity values were collected before and after the passage through the pad for different flow velocities and pad thicknesses, in order to calculate the evaporative efficiency. The variance analysis was significant at 5% probability for the sources of variation of the pad thickness (0.05, 0.075, 0.1 and 0.125 m) and the air flow rate (0.076, 0.264, 0.459 and 0.773 m s-1), and the interactions. The highest efficiency, 57.0% was observed for the interaction between the thickness of 0.125 m and the speed of 0.773 ms-1 as adjusted model.
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- 2019
21. Does irrigated mango cultivation alter organic carbon stocks under fragile soils in semiarid climate?
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dos Santos, Leane Rodrigues, primary, Nascimento Lima, Augusto Miguel, additional, Cunha, Jailson Cavalcante, additional, Rodrigues, Marcos Sales, additional, Barros Soares, Emanuelle Mercês, additional, dos Santos, Laura Paula Araújo, additional, Lopes da Silva, Adriano Victor, additional, and Ferreira Fontes, Maurício Paulo, additional
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- 2019
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22. Evaporative cooling efficiency of pads consisting of vegetable loofah
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Melo Júnior, Júlio César Ferreira de, primary, Bamberg, João Victor Martins, additional, Machado, Neiton Silva, additional, Caldas, Emanuelly Nadja Gomes, additional, and Rodrigues, Marcos Sales, additional
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- 2019
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23. Spatial interpolation techniques for site-specific irrigation management in a mango orchard
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Rodrigues, Marcos Sales, Alves, David Castro, Souza, Valéria Cristina de, Melo, Antonio Carlos de, Lima, Augusto Miguel N., Rodrigues, Marcos Sales, Alves, David Castro, Souza, Valéria Cristina de, Melo, Antonio Carlos de, and Lima, Augusto Miguel N.
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Interpolation techniques can be a suitable approach to apply site-specific management for irrigation in fruit fields. However, which interpolation method will produce more accurate maps? In order to respond this question, the aim of this study was to test the performance of spatial interpolation techniques for mapping soil physical properties for site-specific irrigation management purpose in a mango orchard in the Brazilian semi-arid region. The experimental site was structured in a grid of 60 georeferenced points, which correspond to the number of mango trees spaced about 8 × 10-m in a fruit field in Petrolina county, Pernambuco. Soil texture, bulk density, volumetric water content at -0.01; -0.033; -0.06; -0.1; and -1.5 MPa, and soil water available were determined. Stochastic and deterministic interpolation methods were tested. Soil physical properties did not show spatial dependence preventing the interpolation by stochastic method (Kriging). However, it was possible to interpolate using deterministic methods such as inverse distance weight (IDW), local polynomial interpolation (LPI), and Radial basis functions (RBF). IDW and RBF showed the best results of map quality for physical properties, however, all interpolation method showed relative small errors and could be all used for delineating zones for site-specific irrigation management.
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- 2018
24. Distribuição espaço-temporal de fungos e variáveis climáticas em galpão de galinhas de postura na região semiárida do Brasil
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Lopes, Poliana Moreira, Neiton Silva Machado, Rodrigues, Marcos Sales, Cabral, Patrícia Gonçalves Castro, and Kátia Araújo Da Silva
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A avicultura industrial tem investido cada vez mais em ferramentas que possam otimizar a produtividade. Diversos estudos relatam as interferências que o ambiente de criação exerce sobre a produtividade animal. Ademais, os galpões avícolas são locais de intensa multiplicação de micro-organismos que podem causar contaminações e infecções as aves e aos trabalhadores. Desta forma, o mapeamento de variáveis climáticas e microbiológicas do interior dos galpões avícolas pode-se tornar uma importante ferramenta para a tomada de decisão quanto ao controle sanitário do aviário. Neste contexto, objetivou-se avaliar, nos períodos de inverno e verão, a distribuição espaço-temporal dos gêneros fúngicos e das condições climáticas no interior de um galpão de galinhas de postura na região semiárida do Brasil por meio da ferramenta de geoestatística. A granja está localizada no distrito de Santana do Sobrado, município de Casa Nova, Bahia. Os dados foram coletados seguindo uma malha amostral com 4 colunas e 15 linhas totalizando 60 pontos amostrais no interior do galpão. A avaliação fúngica se deu por meio da coleta dos micro-organismos em placas de Petri com meio de cultura Batata Dextrose Agar. As placas foram expostas ao ar no interior do galpão durante 15 minutos. Posteriormente, estas foram lacradas, transportadas para o laboratório e incubadas por três dias em câmara de crescimento com temperatura e umidade relativa controlada. A identificação do gênero dos fungos foi por meio da sua morfologia com a elaboração de lâminas e analise destas em microscópio óptico. Em cada ponto amostral foi medido com instrumentos digitais portáteis a temperatura, umidade relativa e velocidade do ar. Para estimar a dependência espacial entre as amostras, bem como identificar se as variações foram sistemáticas ou aleatórias, foram utilizados modelos de semivariogramas. Encontrou-se no ambiente aéreo do galpão diversos gêneros de fungos, cujos principais identificados e quantificados no período de inverno e verão foram: Aspergillus spp., Cladosporium spp., Fusarium spp., Mucor spp. e Penicillium spp. De forma geral, as variáveis ambientais apresentaram dependência espacial nos dois períodos estudados. Para os fungos, apenas o gênero Aspergillus spp. apresentou dependência espacial. Com a análise espacial dos dados foi possível identificar a correlação espacial entre as variáveis climáticas com alguns dos gêneros de fungos. Os mapas gerados possibilitaram uma identificação visual dos pontos de maior contaminação por fungos dentro da instalação.
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- 2017
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25. Ambiência de galpões avícolas de postura na região semiárida do Brasil com auxilio da termografia de infravermelho
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Ítalo Vandson Alves Martins, Neiton Silva Machado, Rodrigues, Marcos Sales, Cristiane Dacanal, and Mogami, Cristina Akemi
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A avicultura de postura tem se expandido para regiões com condições climáticas adversas. Dentre estas regiões, consideradas inaptas para tal atividade, destaca-se a RIDE - Região Integrada de Desenvolvimento Econômico de Petrolina Juazeiro localizada no semiárido do submédio São Francisco local que apresenta baixo índice pluviométrico e pouca produção agrícola de grãos. Diante do exposto, objetivou-se com este trabalho avaliar a ambiência animal com auxilio da termografia de infravermelho, em dois galpões de postura convencional com cobertura de telha cerâmica colonial (TCC) e com cobertura de telha de aço galvanizado (TAG), a partir dos parâmetros temperatura superficial das telhas e ITE - Índice de temperatura equivalente. As instalações avaliadas pertencem à granja Santa Ana, localizada próxima ao distrito de Santana do Sobrado município de Casa Nova, Bahia. Os galpões foram construídos no modelo californiano com pórticos de estrutura metálica e equipados com ventiladores e sistema de nebulização interna. Os equipamentos utilizados na coleta dos dados foram: câmera foto térmica, anemômetro e termo-higrômetro. A coleta de dados foi realizada no verão (dezembro), no período vespertino em sete pontos distintos ao longo do comprimento dos galpões. As variáveis climáticas (Temperatura do ar e Umidade Relativa), Índice de temperatura equivalente – ITE e temperatura média da superfície interna das telhas não apresentaram diferença significativa entre os galpões. Entretanto, a velocidade do ar, temperatura máxima da superfície interna das telhas apresentaram diferença significativa a 5% de probabilidade pelo test t de Student.
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- 2017
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26. Spatial interpolation techniques for site-specific irrigation management in a mango orchard
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Rodrigues, Marcos Sales, primary, Alves, David Castro, additional, Souza, Valéria Cristina De, additional, Melo, Antonio Carlos De, additional, and Lima, Augusto Miguel Do Nascimento, additional
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- 2018
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27. Changing in chemical and physical attributes of a sandy soil under irrigated mango cultivation in semiarid region
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Lima, Augusto Miguel N., primary, Cardoso, José Alberto Ferreira, additional, Cunha, Tony Jarbas Ferreira, additional, Rodrigues, Marcos Sales, additional, Hernani, Luis Carlos, additional, Cunha, Jailson Cavalcante, additional, Amaral, Andre Julio do, additional, and Neto, Manoel Batista de Oliveira, additional
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- 2018
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28. Levantamento de solos utilizando geoestatística em uma área de experimentação agrícola em Petrolina-PE
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Silva, Kátia Araújo da, Rodrigues, Marcos Sales, Cunha, Jaílson Cavalcante, Alves, David Castro, Freitas, Helder Ribeiro, Lima, Augusto Miguel N., Silva, Kátia Araújo da, Rodrigues, Marcos Sales, Cunha, Jaílson Cavalcante, Alves, David Castro, Freitas, Helder Ribeiro, and Lima, Augusto Miguel N.
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Due to the importance of accurate information on soils for agricultural production, quantitative techniques to estimate classes and/or soil properties have been developed to increase these maps quality. This manuscript was developed to map soils of an agronomic experimental area using geostatistical tools to assist in the allocation and management of experiments. The study area is located in an agricultural experimental area of Federal University of São Francisco Valley, Petrolina County, Pernambuco state, Brazil. Mapping the agricultural area consisted of a soil profile and a sampling grid with 51 georeferenced points. At these points the soil samples were collected at 0-0.2 m and 0.4-0.6 m soil depths that corresponded to A and B soil horizons, respectively. Soil samples were evaluated for physical (soil texture) and chemical analysis. The spatial dependence of soil attributes was described using semivariograms and maps were interpolated by ordinary kriging. The results showed that the predominant soils in the area were Ultisol with a cohesive eutrophic horizon, Ultisol with a cohesive dystrophic horizon, and Ultisol with a sandy cohesive dystrophic horizon. The geostatistical proved to be an important tool supporting the ultra-detailed pedological mapping of the agricultural research area., Dada a importância de informações precisas sobre os solos para a produção agrícola, técnicas quantitativas para estimar classes e/ou propriedades dos solos têm sido desenvolvidas para aumentar a qualidade destes mapas. Objetivou-se neste trabalho mapear solos em nível ultradetalhado em uma área de experimentação agrícola com o uso de ferramentas geoestatísticas a fim de auxiliar na alocação e manejo de experimentos. O local de estudo se localiza em uma área de experimentação agrícola, no Campus de Ciências Agrárias da Universidade Federal do Vale do São Francisco, município de Petrolina-PE. O mapeamento da área constituiu-se de um perfil completo e uma malha amostral com 51 pontos georreferenciados. Na malha foram realizadas amostragens deformadas nas camadas de 0-0,2 m e 0,4-0,6 m de profundidade que corresponderam aos horizontes A e B, respectivamente. Foram realizadas as análises físicas (granulométrica) e químicas do solo. Descreveu-se a dependência espacial dos atributos do solo usando-se semivariogramas e os mapas foram interpolados pela krigagem ordinária. Os resultados mostraram que os solos predominantes na área foram Argissolo Amarelo eutrocoeso típico, Argissolo Amarelo distrocoeso típico e Argissolo Amarelo distrocoeso arênico. A geoestatística demonstrou ser uma ferramenta importante no auxílio do mapeamento pedológico no nível ultradetalhado da área de experimentação agrícola.
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- 2017
29. Changing in chemical and physical attributes of a sandy soil under irrigated mango cultivation in semiarid region
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Lima, Augusto Miguel N., Cardoso, José Alberto Ferreira, Cunha, Tony Jarbas Ferreira, Hernani, Luis Carlos, Amaral, Andre Julio do, Neto, Manoel Batista de Oliveira, Cunha, Jaílson Cavalcante, Rodrigues, Marcos Sales, Lima, Augusto Miguel N., Cardoso, José Alberto Ferreira, Cunha, Tony Jarbas Ferreira, Hernani, Luis Carlos, Amaral, Andre Julio do, Neto, Manoel Batista de Oliveira, Cunha, Jaílson Cavalcante, and Rodrigues, Marcos Sales
- Abstract
Accelerated land use changes have been observed in Brazil. In Northeast, the Caatinga (native vegetation) has been replaced by fruit production, especially by mango and grapevine cultivation. Land use changes, tied to management techniques, can change the soil chemical and physical attributes. Thus, the present study aimed to evaluate the impact of irrigated mango cultivation in soil chemical and physical attributes in relation to the native Caatinga in the semi-arid region. The study was carried out at Boa Esperança Farm located in Petrolina, Pernambuco State, Brazil. In areas under irrigated mango and native Caatinga soil samples at 0-10 and 10-20 cm depth were collected. After collected and prepared soil samples, it was determined the macro (Ca2+, Mg2+, K+, P) and micronutrients (Cu2+, Fe2+, Zn2+, Mn2+) contents, Na content, electrical conductivity, pH, exchangeable acidity (Al3+) and potential acidity (H+Al). It was also determined soil texture, bulk density, particle density and total porosity. The mango cultivation increased the macronutrient contents, as well as, the micronutrients except for Fe2+ content. The physical attributes did not show difference comparing irrigated mango to native caatinga.
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- 2017
30. Levantamento de solos utilizando geoestatística em uma área de experimentação agrícola em Petrolina-PE
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Silva, Kátia Araújo da, primary, Rodrigues, Marcos Sales, additional, Cunha, Jailson Cavalcante, additional, Alves, David Castro, additional, Freitas, Helder Ribeiro, additional, and Lima, Augusto Miguel Nascimento, additional
- Published
- 2017
- Full Text
- View/download PDF
31. Evaporative cooling efficiency of pads consisting of vegetable loofah.
- Author
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Ferreira de Melo Júnior, Júlio César, Martins Bamberg, João Victor, Silva Machado, Neiton, Gomes Caldas, Emanuelly Nadja, and Rodrigues, Marcos Sales
- Subjects
ATMOSPHERIC temperature ,LOW temperatures ,AIR flow ,ANALYSIS of variance ,FLOW velocity - Abstract
Brazilian agroindustry has presented constant innovations in the use of equipment and materials, among which are those that generate artificial thermal conditioning inside the zootechnical facilities, through a direct evaporative cooling system (DEC). In order to mitigate the effects of high temperatures associated with low air humidity in buildings in the northeastern region of Brazil, the use of DEC systems is evident. Therefore, DEC’s built with evaporative pads constituted of alternative materials, prove to be an interesting and viable alternative. The aim of this work was to evaluate the cooling efficiency of the evaporative pads constituted of vegetable loofah. The experiment was performed at the Campus de Ciências Agrárias, Federal University of the São Francisco Valley (UNIVASF) in Petrolina, Pernambuco state. The experimental design was in randomized blocks, in a 4x4 factorial scheme, with 13 replicates. Air temperature and relative humidity values were collected before and after the passage through the pad for different flow velocities and pad thicknesses, in order to calculate the evaporative efficiency. The variance analysis was significant at 5% probability for the sources of variation of the pad thickness (0.05, 0.075, 0.1 and 0.125 m) and the air flow rate (0.076, 0.264, 0.459 and 0.773 m s
-1 ), and the interactions. The highest efficiency, 57.0% was observed for the interaction between the thickness of 0.125 m and the speed of 0.773 ms-1 as adjusted model. [ABSTRACT FROM AUTHOR]- Published
- 2019
- Full Text
- View/download PDF
32. Uso de redes neurais artificiais na análise de variáveis ambientais associadas à deposição de serapilheira
- Author
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Sales Rodrigues Aquino, Priscila, Rodrigues, Marcos Sales, Oliveira Castro, Renato Vinícius, Eloi Nappo, Mauro, Sales Rodrigues Aquino, Priscila, Rodrigues, Marcos Sales, Oliveira Castro, Renato Vinícius, and Eloi Nappo, Mauro
- Abstract
The objective of this study was to evaluate, with the use of artificial neural networks, the influence of some environmental variables in litterfall. The study was conducted on the gallery forest along ‘Lava-pés’ stream in Goiás State, Brazil where the experimental site (3 ha) was structured in a grid of 60 litterfall traps, with 0.33 m2 each and held 0.65 m above the soil, georeferenced and spaced at intervals of 32 x 32 m. Litterfall was monthly collected from December 2011 to November 2012. All litterfall samples were manually separated into three fractions: leaves (LE), branch bark (BB), and reproductive parts (RP). Relevance of climate , temporal, spatial and phytosociological variables in litterfall deposition were evaluated, through sensitivity analysis provided by the artificial neural network with the best performance. According to the statistical analysis, all variables were significant in the phenomenon, while the variable time (months of the year) was the most important for litterfall in the evaluated area. Artificial neural networks are shown as a powerful tool for litterfall analysis., O objetivo do trabalho foi avaliar, por meio de redes neurais artificiais, a influência de algumas variáveis ambientais associadas à deposição de serapilheira. O estudo foi realizado na mata de galeria do córrego Lava-pés (3 ha) em Ipameri, GO, utilizando-se 60 coletores instalados em uma malha regular georreferenciada de 32 x 32 m. A serapilheira foi coletada mensalmente de dezembro de 2011 a novembro de 2012. Todas as amostras foram separadas manualmente nas frações: folhas (FF), ramos (FR - galhos e cascas), e estruturas reprodutivas (FER - flores, frutos e sementes). Avaliou-se a relevância de variáveis climáticas, temporais, espaciais e fitossociológicas na deposição da serapilheira, por meio da análise de sensibilidade fornecida no treinamento da rede neural artificial de melhor desempenho. De acordo com a análise estatística realizada, todas as variáveis estudadas foram relevantes no fenômeno estudado, entretanto a variável temporal (meses do ano) foi a mais importante na deposição de serapilheira na área em estudo. As redes neurais artificiais mostram-se como uma potente ferramenta na análise da deposição de serapilheira.
- Published
- 2016
33. Soil Mapping as a Tool for Agricultural Management
- Author
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Rodrigues, Marcos Sales, primary
- Published
- 2016
- Full Text
- View/download PDF
34. ANÁLISE ESPACIAL DA PRODUTIVIDADE DE SERAPILHEIRA EM UMA MATA DE GALERIA
- Author
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Aquino, Priscila Sales Rodrigues, primary, Nappo, Mauro Eloi, additional, Rodrigues, Marcos Sales, additional, Pereira, Ismael Martins, additional, Matricardi, Eraldo Aparecido Trondoli, additional, and Pelá, Gláucia de Mello, additional
- Published
- 2016
- Full Text
- View/download PDF
35. Análise espacial e temporal de atributos do solo e da produtividade das culturas visando manejo específico em áreas agrícolas
- Author
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Rodrigues, Marcos Sales [UNESP], Universidade Estadual Paulista (Unesp), Corá, José Eduardo [UNESP], and Mueller, Thomas [UNESP]
- Subjects
Análise espacial (Estatística) ,Milho ,Calagem dos solos ,Algoritmos ,Precision farming ,Produtividade agrícola ,Solos - Analise - Abstract
Made available in DSpace on 2014-06-11T19:33:37Z (GMT). No. of bitstreams: 0 Previous issue date: 2013-03-21Bitstream added on 2014-06-13T21:06:39Z : No. of bitstreams: 1 rodrigues_ms_dr_jabo.pdf: 890787 bytes, checksum: 9448ffeb8773fbaf66de6a6ed200fc3f (MD5) Os atributos do solo e a produtividade das culturas podem variar no tempo e no espaço, assim como suas relações de causa/efeito. O presente trabalho objetivou analisar atributos do solo e da produtividade das culturas visando o manejo específico de áreas agrícolas. Para isto, foram utilizadas três ferramentas: uso de modelos de regressão espaço-temporal para entendimento da relação entre atributos do solo e produtividade do milho; uso de algoritmo de agrupamento 'fuzzy c-means' para delineamento de zonas homogêneas de manejo; e uso de um sensor de pH do solo em tempo real. Os dois primeiros estudos foram realizados em Jaboticabal, SP. Foram avaliados a produtividade de milho e os atributos químicos e físicos do solo de seis anos agrícolas entre os anos de 2001 a 2010. O primeiro estudo avaliou quatro modelos de regressão os quais foram: mínimos quadrados ordinários; mínimos quadrados generalizados assumindo heteroscedasticidade; modelo espacial e temporal, assumindo homocedasticidade; e modelo espacial e temporal, assumindo heteroscedasticidade. Verificou-se que o modelo espacial e temporal, assumindo heteroscedasticidade foi superior aos demais e que a acidez do solo (pH) foi o fator que mais influenciou a variabilidade da produtividade de milho em todos os anos agrícolas. No segundo estudo, verificou-se que o uso de algoritmo de agrupamento fuzzy c-means' foi eficiente para delinear zonas homogêneas de manejo, quando foi considerada a variabilidade espacial e temporal dos atributos do solo e da produtividade de milho. O terceiro estudo foi conduzido em três campos de produção agrícola nos EUA, e o objetivo foi avaliar o sensor de pH em tempo real Veris (MSP)® em Kentucky, avaliando a acurácia das medidas de pH, 'buffer pH' e a necessidade de calagem usando técnicas analíticas e propondo um... Soil attributes and crop yield may vary over space and time as well as their cause-effect relationships. Therefore, the objectives of this study were analyze soil attributes and crop yield to apply site-specific management on crop fields, in this regard, it was used three techniques, which were: models that accounted for spatial-temporal autocorrelation to evaluate the relationship between corn yield and soil attributes; identify management zones using fuzzy c-means clustering analysis based on the spatial and temporal variability of soil attributes and corn yield, and use the Veris (MSP)® on-the-go soil sensing system to lime requirement recommendation. The first two studies were carried out in Jaboticabal, SP, Brazil. Soil chemical and physical attributes were measured between 2001 and 2010 year. Ordinary least square, generalized least squares assuming heteroscedasticity, spatial-temporal least squares assuming homoscedasticity, and spatial-temporal model assuming heteroscedasticity analyses were used to estimate corn yield in the first study. The spatial and temporal autocorrelation assuming heteroscedasticity was superior to the other studied model for prediction and soil acidity (pH) was the factor that most influenced corn yield over time in this study. In the second study, which the fuzzy c-means cluster analysis based on the spatial and temporal variability of soil attributes and corn yield was used, it was observed that this technique was efficient to delineate management zones. The third study was carried out in three crop fields in Kentucky, EUA, and it aimed to evaluate the Veris on-the-go pH sensor system for soil pH management by assessing the accuracy of soil pH measurements and associated spatial predictions of buffer pH, and lime requirement proposed a new method for correcting interpolation... (Complete abstract click electronic access below)
- Published
- 2013
36. Spatial relationships between soil attributes and corn yield in no-tillage system
- Author
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Rodrigues, Marcos Sales [UNESP], Corá, José Eduardo [UNESP], Fernandes, Carolina [UNESP], and Universidade Estadual Paulista (UNESP)
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Precision agriculture ,Geostatistics ,Spatial correlation ,Zea mays ,Soil sampling intensity - Abstract
Made available in DSpace on 2022-04-29T08:48:55Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-03-01 Soil properties play an important role in spatial variability of crop yield. However, a low spatial correlation has generally been observed between maps of crop yield and of soil properties. The objectives of the present investigation were to assess the spatial pattern variability of soil properties and of corn yield at the same sampling intensity, and evaluate its cause-and-effect relationships. The experimental site was structured in a grid of 100 referenced points, spaced at 10 m intervals along four parallel 250 m long rows spaced 4.5 m apart. Thus, points formed a rectangle containing four columns and 25 rows. Therefore, each sampling cell encompassed an area of 45 m2 and consisted of five 10 m long crop rows, in which the referenced points represented the center. Samples were taken from the layers 0-0.1 m and 0.1-0.2 m. Soil physical and chemical properties were evaluated. Statistical analyses consisted of data description and geostatistics. The spatial dependence of corn yield and soil properties was confirmed. The hypothesis of this study was confirmed, i.e., when sampling the soil to determine the values of soil characteristics at similar to sampling intensity as for crop yield assessments, correlations between the spatial distribution of soil characteristics and crop yield were observed. The spatial distribution pattern of soil properties explained 65 % of the spatial distribution pattern of corn yield. The spatial distribution pattern of clay content and percentage of soil base saturation explained most of the spatial distribution pattern of corn yield. São Paulo State University - UNESP, Via de acesso Prof. Paulo Donato Castellane s/n, CEP 14884-900. Jaboticabal (SP) Soil Science Department São Paulo State University - UNESP São Paulo State University - UNESP, Via de acesso Prof. Paulo Donato Castellane s/n, CEP 14884-900. Jaboticabal (SP) Soil Science Department São Paulo State University - UNESP
- Published
- 2012
37. ORGANIC MATTER FRACTIONS IN A QUARTZIPSAMMENT UNDER CULTIVATION OF IRRIGATED MANGO IN THE LOWER SÃO FRANCISCO VALLEY REGION, BRAZIL
- Author
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Cardoso, José Alberto Ferreira, primary, Lima, Augusto Miguel Nascimento, additional, Cunha, Tony Jarbas Ferreira, additional, Rodrigues, Marcos Sales, additional, Hernani, Luis Carlos, additional, Amaral, Andre Julio do, additional, and Oliveira Neto, Manoel Batista de, additional
- Published
- 2015
- Full Text
- View/download PDF
38. Variabilidade espacial de atributos do solo e da produtividade de milho
- Author
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Rodrigues, Marcos Sales [UNESP], Universidade Estadual Paulista (Unesp), Corá, José Eduardo [UNESP], and Fernandes, Carolina [UNESP]
- Subjects
sampling ,Milho ,Precision agriculture ,Clay content Zea mays ,Geostatistics ,Amostragem ,Base saturation ,Agricultura de precisão - Abstract
Made available in DSpace on 2014-06-11T19:23:24Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-01-22Bitstream added on 2014-06-13T20:10:46Z : No. of bitstreams: 1 rodrigues_ms_me_jabo.pdf: 1277888 bytes, checksum: fca43b2044e8d0aa95f9d93c7040361b (MD5) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Diversos fatores são responsáveis pela variabilidade espacial na produtividade das culturas e dentre estes estão os atributos do solo. Contudo, o que se tem observado, geralmente, é uma baixa correlação entre os mapas de produtividade e os mapas de atributos do solo. Uma hipótese para essa baixa correlação é a diferença na amostragem de cada uma dessas variáveis. O trabalho objetivou estudar o padrão de distribuição espacial dos atributos do solo e da produtividade do milho e as relações de causas e efeitos utilizando-se diferentes intensidades de amostragem. Os dados foram coletados seguindo uma grade amostral contendo 100 pontos georreferenciados. Os pontos foram dispostos em intervalos equidistantes, sendo de 10 m no sentido das linhas da cultura, ao longo de quatro transeções paralelas com 250 m de comprimento, distanciadas entre si 4,5 m, formando um retângulo com quatro colunas e 25 linhas, constituindo os 100 pontos de amostragem. Cada ponto amostral foi composto por cinco linhas de 10 m da cultura, constituindo uma célula amostral de 45 m2. Em cada ponto amostral retiraram-se amostras de solo nas profundidades de 0-0,1 e 0,1-0,2 m. Foram avaliados os atributos do solo textura, pH, teores de matéria orgânica, P, K+, Ca2+, Mg2+, H+Al, soma de bases, capacidade de troca de cátions, saturação por bases, densidade, porosidade total, macroporosidade e microporosidade. Foram estabelecidas intensidades de amostragens por meio de eliminação de pontos intermediários partindo da amostragem inicial, que continha 100 pontos, obtendo-se conjunto de dados com 100, 75, 50 e 25 pontos. Realizou-se a análise estatística descritiva dos dados e geoestatística. Baseado na análise de correlação simples, regressão múltipla ‘stepwise’ e semelhança dos mapas de isolinhas, os atributos que mais se correlacionaram... Soil attributes play an important role in spatial variability of crop yield. However, what has been observed, generally, is a low correlation between the yield maps and maps of soil attributes. One hypothesis for this low correlation is the difference in the sampling of each of these variables. This research had as objective to study spatial distribution pattern of soil attributes affecting corn yield and their causeeffect relationship, for different sampling intensities. Spatial variability was determined for 100 georeferenced sample points from a sampling grid. Sample points were arranged in regular 10-m intervals along the rows and in four parallel 250-m long and 4.5-m spaced transects, resulting in a 4-column and 25-row rectangle (100 sample points). Each sample point consisted of five 10-m rows, totaling 45 m2. Samples were taken from the depths 0-0,1 and 0,1-0,2 m. Soil texture attributes, pH, organic matter content, P, K+, Ca2+, Mg2+ and H+Al levels, sum of bases, cation exchange capacity, base saturation, bulk density, total porosity, macroporosity and microporosity were evaluated. Sampling intensities were established by eliminating intermediary points from the initial 100-point sampling, resulting data sets of 100, 75, 50 and 25 points. Statistical analysis consisted of data description and geostatistics. Based on the simple correlation analysis, stepwise multiple regression and similarity among isoline maps, the attributes that showed stronger spatial correlation to corn yield were base saturation and clay content. For these attributes, data sets of 75 and 100 points showed higher similarity in the spatial distribution pattern for corn yield. The analysis of cross-semivariograms showed that the best correlation between corn yield and soil attributes was obtained with a sampling intensity of 100 points. It was possible to confirm the hypothesis that, when performing the soil... (Complete abstract click electronic access below)
- Published
- 2010
39. Changing in chemical and physical attributes of a sandy soil under irrigated mango cultivation in semiarid region.
- Author
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Cardoso, José Alberto Ferreira, Lima, Augusto Miguel Nascimento, Cunha, Tony Jarbas Ferreira, Rodrigues, Marcos Sales, Hernani, Luis Carlos, Cunha, Jailson Cavalcante, do Amaral, Andre Julio, and de Oliveira Neto, Manoel Batista
- Subjects
MANGO varieties ,SANDY soils ,IRRIGATION ,SOIL chemistry ,LAND use ,ARID regions - Abstract
Accelerated land use changes have been observed in Brazil. In Northeast, the Caatinga (native vegetation) has been replaced by fruit production, especially by mango and grapevine cultivation. Land use changes, tied to management techniques, can change the soil chemical and physical attributes. Thus, the present study aimed to evaluate the impact of irrigated mango cultivation in soil chemical and physical attributes in relation to the native Caatinga in the semiarid region. The study was carried out at Boa Esperança Farm located in Petrolina, Pernambuco State, Brazil. In areas under irrigated mango and native Caatinga soil samples at 0-10 and 10-20 cm depth were collected. After collected and prepared soil samples, it was determined the macro (Ca
2+ , Mg2+ , K+, P) and micronutrients (Cu2+ , Fe2+ , Zn2+ , Mn2+ ) contents, Na content, electrical conductivity, pH, exchangeable acidity (Al3+ ) and potential acidity (H+Al). It was also determined soil texture, bulk density, particle density and total porosity. The mango cultivation increased the macronutrient contents, as well as, the micronutrients except for Fe2+ content. The physical attributes did not show difference comparing irrigated mango to native caatinga. [ABSTRACT FROM AUTHOR]- Published
- 2017
- Full Text
- View/download PDF
40. PHOSPHORUS SOURCES TO FOLIAR FERTILIZATION IN COMMON BEAN CROP
- Author
-
CNPq, PELÁ, Adilson; UEG, RODRIGUES, Marcos Sales; FCAV-UNESP, SANTANA, Jaiciclênia da Silva; UEG, TEIXEIRA, Itamar Rosa; UEG, CNPq, PELÁ, Adilson; UEG, RODRIGUES, Marcos Sales; FCAV-UNESP, SANTANA, Jaiciclênia da Silva; UEG, and TEIXEIRA, Itamar Rosa; UEG
- Abstract
Great part of the phosphorus in the fertilizations tropical soils is lost through fixation. The foliar fertilization, once it uses very lower amounts when compared to the ones applied on soil, it is constituted in an important alternative for the reduction of element losses through fixation in these soils. The objective of this work was to evaluate the applied phosphorus sources to foliar fertilization in commom bean crop, on production components, the grain yield and the amount of the nutrient in the grains. The experiment was carried out in a greenhouse, in pots. The used design was completely randomized with four replications and six treatments: 1- soil fertilization; 2-control treatment (without fertilization); foliar fertilization with the sources 3- potassium phosphite; 4-phosphoric acid; 5-monoammonium phosphate; and 6-potassium phosphate. The P foliar applications were accomplished weekly beginning from the seventh day after the emergence. The grain yield with the P foliar application overcame the witness treatment, but it was inferior the fertilization via soil. The sources were not affected the grain yield, but the potassium phosphate and the monoammonium phosphate provided larger accumulation of P in the grains., Grande parte do fósforo utilizado nas adubações em solos tropicais é perdida por fixação. A adubação via foliar, por utilizar-se de quantidades bem inferiores às aplicadas ao solo, constitui-se numa importante alternativa para a redução das perdas do elemento por fixação nestes solos. Este trabalho teve como objetivo avaliar o efeito de fontes de fósforo aplicadas via foliar na cultura do feijoeiro, sobre os componentes de produção, a produtividade e a quantidade do nutriente nos grãos. Foi conduzido um experimento em vasos, sob casa-de-vegetação, em delineamento inteiramente casualizado com quatro repetições e seis tratamentos: 1 - adubação completa via solo; 2 - testemunha (sem adubação); aplicação foliar com as fontes: 3 - fosfito de potássio; 4 - ácido fosfórico; 5 -fosfato monoamônico; e 6 - fosfato de potássio. As aplicações foliares de P foram realizadas semanalmente a partir do sétimo dia após a emergência, na concentração de 10 mg dm-3. A produtividade de grãos com a aplicação de P foliar foi superior à testemunha, porém inferior à adubação via solo. Não houve diferenças entre as fontes para a produtividade de grãos, mas o fosfato de potássio e o fosfato monoamônico proporcionaram maior acúmulo de P nos grãos. 
- Published
- 2009
41. Fontes de fósforo para adubação foliar na cultura do feijoeiro
- Author
-
Pelá, Adilson, Rodrigues, Marcos Sales, Silva Santana, Jaiciclênia da, Teixeira, Itamar Rosa, Pelá, Adilson, Rodrigues, Marcos Sales, Silva Santana, Jaiciclênia da, and Teixeira, Itamar Rosa
- Abstract
Great part of the phosphorus in the fertilizations tropical soils is lost through fixation. The foliar fertilization, once it uses very lower amounts when compared to the ones applied on soil, it is constituted in an important alternative for the reduction of element losses through fixation in these soils. The objective of this work was to evaluate the applied phosphorus sources to foliar fertilization in commom bean crop, on production components, the grain yield and the amount of the nutrient in the grains. The experiment was carried out in a greenhouse, in pots. The used design was completely randomized with four replications and six treatments: 1- soil fertilization; 2-control treatment (without fertilization); foliar fertilization with the sources 3- potassium phosphite; 4-phosphoric acid; 5-monoammonium phosphate; and 6-potassium phosphate. The P foliar applications were accomplished weekly beginning from the seventh day after the emergence. The grain yield with the P foliar application overcame the witness treatment, but it was inferior the fertilization via soil. The sources were not affected the grain yield, but the potassium phosphate and the monoammonium phosphate provided larger accumulation of P in the grains, Grande parte do fósforo utilizado nas adubações em solos tropicais é perdida por fixação. A adubação via foliar, por utilizar-se de quantidades bem inferiores às aplicadas ao solo, constitui-se numa importante alternativa para a redução das perdas do elemento por fixação nestes solos. Este trabalho teve como objetivo avaliar o efeito de fontes de fósforo aplicadas via foliar na cultura do feijoeiro, sobre os componentes de produção, a produtividade e a quantidade do nutriente nos grãos. Foi conduzido um experimento em vasos, sob casa-de-vegetação, em delineamento inteiramente casualizado com quatro repetições e seis tratamentos: 1 - adubação completa via solo; 2 - testemunha (sem adubação); aplicação foliar com as fontes: 3 - fosfito de potássio; 4 - ácido fosfórico; 5 -fosfato monoamônico; e 6 - fosfato de potássio. As aplicações foliares de P foram realizadas semanalmente a partir do sétimo dia após a emergência, na concentração de 10 mg dm-3 . A produtividade de grãos com a aplicação de P foliar foi superior à testemunha, porém inferior à adubação via solo. Não houve diferenças entre as fontes para a produtividade de grãos, mas o fosfato de potássio e o fosfato monoamônico proporcionaram maior acúmulo de P nos grãos
- Published
- 2009
42. Spatial relationships between soil attributes and corn yield in no-tillage system
- Author
-
Rodrigues, Marcos Sales, primary, Corá, José Eduardo, additional, and Fernandes, Carolina, additional
- Published
- 2012
- Full Text
- View/download PDF
43. FONTES DE FÓSFORO PARA ADUBAÇÃO FOLIAR NA CULTURA DO FEIJOEIRO
- Author
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PELÁ, Adilson, primary, RODRIGUES, Marcos Sales, additional, SANTANA, Jaiciclênia Da Silva, additional, and TEIXEIRA, Itamar Rosa, additional
- Published
- 2009
- Full Text
- View/download PDF
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