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Made available in DSpace on 2021-06-25T10:24:45Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-01-01. Added 1 bitstream(s) on 2021-07-15T15:04:37Z : No. of bitstreams: 1 S1413-70542020000100238.pdf: 700873 bytes, checksum: 8bb117bd81425c0ea12db2dd5cceec2b (MD5) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) The present study evaluated the physiological and biochemical parameters of apple trees under different irrigation water depths in a semiarid region of Brazil. The experiment had a split-plot randomized block design. Irrigation levels (60, 80, 100, and 120% of the reference evapotranspiration-ET0) and two apple cultivars (Julieta and Princesa) were analysed in the experimental plots and the phenological stages (vegetative, flowering and fruiting) were analysed in the experimental subplots. The physiological characteristics evaluated included the chlorophyll index, relative water content, net photosynthesis, stomatal conductance, transpiration, internal CO2 concentration, leaf temperature and instant carboxylation efficiency. The biochemical characteristics evaluated included the leaf contents of reducing sugars, total soluble sugars, and non-reducing sugars and proteins. The best biochemical responses were observed in the Princesa cultivar under 80% ET0 during the flowering and vegetative stages and under 120% ET0 during the fruiting stage. The best physiological responses for all phenological stages were observed under irrigation levels of 120% ET0 for both cultivars. The cv. Princesa demonstrated osmotic adjustment under water stress conditions during the phenological stages evaluated. Universidade Estadual Paulista “Júlio de Mesquita Filho”/Unesp Empresa Brasileira de Pesquisa Agropecuária/EMBRAPA Embrapa Semiárido Universidade Federal do Vale do Sao Francisco/UNIVASF Universidade Estadual Paulista “Júlio de Mesquita Filho”/Unesp

Buscando minimizar os efeitos sazonais nas plantas cultivadas em diferentes épocas, o presente estudo objetivou avaliar as respostas de produtividade e pós-colheita do melão ?pele de sapo? submetido à lâminas de irrigação e doses de bioestimulante em diferentes períodos no Semiárido brasileiro. As parcelas foram as lâminas de irrigação: 60; 80; 100; e 120% da evapotranspiração da cultura (ETc), as subparcelas foram cinco doses do bioestimulante Stimulate®: 0; 0,6; 1,2; 2,4 e 4,8 L ha-1, e as subsubparcelas foram dois períodos de cultivo: quente e frio. Foram avaliadas as variáveis produtividade total e comercial, peso médio do fruto comercial, sólidos solúveis totais (SST), pH, acidez total titulável (ATT) e firmeza de polpa (FP). A dose de 4,8 L ha-1 com a lâmina de 120% da ETc, no período quente, promoveram melhores condições de desenvolvimento e, consequentemente, um maior incremento na produtividade quando comparado com o período frio do semiárido brasileiro. A qualidade dos frutos foi influenciada pelo maior teor de SST no período quente e ATT no período frio, submetida à dose de 4,8 L ha-1 do Stimulate® e às lâminas abaixo de 100% da evapotranspiração da cultura. Made available in DSpace on 2022-09-23T12:05:20Z (GMT). No. of bitstreams: 1 SAZONALIDADE-DA-PRODUTIVIDADE.pdf: 611634 bytes, checksum: 9e0fcf5c4516f1307f93bc5b47b7706c (MD5) Previous issue date: 2021 Edição Especial. Nordeste.

The objective of this work was to evaluate physiological and biochemical responses of Pele de sapo melon to different irrigation depths (ID) and bioestimulant rates (BTM) to improve its production efficiency. The experiment was conducted in an experimental field in Juazeiro, BA, Brazil. A randomized block design in split split-plot arrangement was used, with four ID (60, 80, 100, and 120% of crop evapotranspiration ? ETc) in the plots; five (BTM) (Stimulate® at 0, 0.6, 1.2, 2.4, and 4.8 L ha-1 applied via irrigation system during the flowering stage and after the fruiting stage) in the subplots; and two crop seasons (hot season, 23 to 39 °C; and cold season, 15 to 30 °C) in the sub-subplots. The plants were under daily drip irrigation and spacing of 2.0 × 0.3 m. The variables evaluated were: gas exchange, water use efficiency, chlorophyll a and b, relative water, sugar, and amino acid contents, and fruit yield. The results showed that the ID of 60% ETc resulted in water deficit, denoted by increases in solute concentrations, whereas the ID of 80% and 100% resulted in plants with good performance for biochemical, physiological, and production parameters in both crop seasons. The hot season, ID of 120% ETc, and BTM of 2.4 L ha-1 are recommended for Pele de sapo melon crops, since they result in the best physiological responses and fruit yields. Keywords: Cucumis melo, irrigation management, water defi Made available in DSpace on 2021-02-19T19:18:44Z (GMT). No. of bitstreams: 1 Pele-de-sapo-melon-grown-under-different-2020.pdf: 3250345 bytes, checksum: 28185cd2c3e5ae22b7b83e643f83898e (MD5) Previous issue date: 2020

O objetivo deste trabalho foi avaliar a influência de quatro arranjos de sistemas de irrigação sobre a fisiologia, a produtividade e a qualidade pós-colheita dos frutos da mangueira (Mangifera indica L.) cv. Keitt, no Submédio do Vale São Francisco. O experimento foi conduzido no delineamento experimental em blocos casualizados, com 04 tratamentos e 05 repetições, durante dois ciclos de cultivo. Os tratamentos foram: T1 ? Um microaspersor sob copa; T2 ? Um microaspersor entre plantas; T3 ? Duas linhas laterais de gotejadores por fileira de planta; e T4 ? Uma faixa de gotejo em formato de anel ou espiral (rabo de porco) ao redor da planta. Foram avaliadas: as respostas fisiológicas das plantas (fotossíntese líquida, condutância estomática, transpiração e temperatura foliar); o peso médio dos frutos; a produtividade; a quantidade de frutos por planta; e a qualidade dos frutos: volume, densidade, firmeza da polpa, teor de sólidos solúveis e acidez titulável. O sistema de irrigação por gotejamento é o mais indicado para o cultivo da mangueira cv. Keitt no Submédio do Vale do São Francisco, por interferir positivamente na fisiologia e na produtividade da planta e no número e firmeza dos frutos. Made available in DSpace on 2018-07-11T00:37:01Z (GMT). No. of bitstreams: 1 Welson2018.pdf: 563154 bytes, checksum: b757b1514c6694e769ff8e549273dcc6 (MD5) Previous issue date: 2018-07-10

The viticulture in the semiarid region of Brazil stands out in the country due to the expansion of its cultivated area and increased production, especially in the sub-mid São Francisco Valley. However, the supplying of water and an efficient replacement of nutrients to the soil are essential for these crops, due to the intrinsic climatic conditions of this region, such as low rainfall and high evapotranspiration. This study aimed at evaluating the physiological characteristics of ?Itália? grapevine (Vitis vinifera L.) under irrigation and fertilization management. The experiment was conducted in a randomized block design, with four replications, in a split-plot arrangement, with four irrigation water depths (0.75, 1.00, 1.25 and 1.5 times the crop coefficient) in the plots and four fertilizer rates (100 %, 75 %, 50 % and 25 %, based on the recommended fertilizer rates for this crop) in the subplots, with addition of organic compounds. The leaf water potential, leaf chlorophyll content, relative water content, photosynthesis, stomatal conductance, internal CO2 partial pressure, leaf temperature and biomass accumulation in the berries were evaluated. The highest leaf chlorophyll contents were found in treatments with fertilizer rates of 70-85 %. Stomatal conductance decreased with the increasing irrigation water depths, thus reducing the internal CO2 partial pressure and increasing the leaf temperature and air vapor pressure deficit. The reduction of 25 % in the conventional fertilization and irrigation of 135 % of the recommended coefficient resulted in the highest average weight of berries. The highest yields were obtained with the lowest irrigation water depths and fertilizer rates of 50-65 %. Made available in DSpace on 2018-03-09T00:32:50Z (GMT). No. of bitstreams: 1 Welson12017.pdf: 357453 bytes, checksum: 06f1e77f7f3142aa087e6865e7928814 (MD5) Previous issue date: 2018-03-08

The objective of this study was to evaluate the effect of different irrigation levels on flowering, fruit set, carbohydrate and protein content and gas exchange, of apple varietiesin the Brazilian semiarid region. The experimental design was a randomized block with split plots with five replications and four plot irrigation levels (60, 80, 100, and 120% of the reference evapotranspiration (ETo)) and the subplots with two cultivars (Juliet and Princess). As a result, it was found that the number of flowers (NFL), fruits (NFR), shoot percentage (SP) and fruit set (FS) were higher in cv. Juliet. The number of buds (NB) and the fertility index (FI) were higher in cv. Princess. With regard to metabolites, reducing sugar content (RS) had no significant effect among cultivars. The non-reducing sugar content (NRS), total soluble sugar (TSS) and total soluble proteins (TSP) were higher in cv. Princess. As for irrigation depths, TSP, sprouting, flowering and fruit set increased along with the amount of water applied, while the RS, NRS and TSS contents had the opposite behavior. Made available in DSpace on 2017-11-08T23:28:20Z (GMT). No. of bitstreams: 1 Welson12017.pdf: 948491 bytes, checksum: 90d07f3be598487f3bbe87c57f3541e7 (MD5) Previous issue date: 2017-11-08

The aim of this research was to evaluate aspects related to flowering, fruiting and quality of Italia grape produced under different irrigation and fertilization. The experiment was performed from October, 2014 to February, 2015, in a production area of 0.50 ha at IFSERTÃO-PE, in Petrolina-PE, Brazil. The experiment was carried out in a randomized blocks design, with a split block scheme, with four irrigation treatments (plots), four fertilizer treatments (subplots) and four repetitions. The plots consisted of the multiplying factors, 0.75 (L1); 1.00 (L2); 1.25 (L3) and 1.50 (L4), of the recommended crop coefficients (Kc) by Embrapa Semi-Arid for the ?Italia? grapevine. The subplots were composed by the factors 1.00 (AD1), 0.75 (AD2), 0.50 (AD3) and 0.25 (AD4) of the recommended fertilization with an BIOSON as organic product (commercial name). It was observed that the reduction in water depth provided greater number of buds per branch and a larger number of clusters per plant. The highest yields were obtained with lower irrigation depths and 50% and 65% of the recommended fertilization. The highest soluble solids of the fruit were achieved using the 75% of irrigation Kc and 25% of recommended mineral fertilization. The lower total acidity values were obtained with the Kc multiplication factors that were lower than 1.04 and higher than 1.22.

O objetivo deste trabalho foi avaliar as alterações nas variáveis fisiológicas e composição físico-química de vinhos elaborados a partir de videiras submetidas a diferentes estratégias de irrigação. Os tratamentos aplicados foram: irrigação plena - irrigação realizada durante todo o ciclo de produção; irrigação com déficit controlado - onde a irrigação foi interrompida aos 49 dias após a poda, sendo realizadas eventuais irrigações após a interrupção, de acordo com o monitoramento da água no solo; e a irrigação com déficit, onde a aplicação de água foi interrompida desde os 49 dapp até a colheita. O potencial hídrico foliar foi medido utilizando a bomba de Scholander. Os índices de clorofila a, be total foram mensurados utilizando o dispositivo portátil (ClorofiLOG -CFL 1030). As coletas de dados referentes a atividade fotossintética foram determinadas a partir do analisador portátil de gás por infravermelho (Modelo Li-6400). Os ácidos orgânicos e os compostos fenólicos foram quantificados utilizando a cromatografia líquida de alta eficiência. O déficit de irrigação reduziu o potencial hídrico, a fotossíntese, a produtividade, o ácido tartárico e aumentou a concentração de compostos fenólicos. Vinhos obtidos de uvas de plantas dos tratamentos com déficit podem ser destinados a elaboração de vinhos de guarda Made available in DSpace on 2019-08-17T00:39:28Z (GMT). No. of bitstreams: 1 TROCASGASOSASECOMPOSICAOFISICOQUIMICADEVINH.pdf: 734966 bytes, checksum: 2d11317c2979e9304cd74c3ecfabdc18 (MD5) Previous issue date: 2016 Edição Especial, Irrigação.