Com esta pesquisa objetivou-se estudar os efeitos de 5 doses de 4 diferentes tipos de biofertilizante na produção da bananeira Nanicão, em 3 ciclos sucessivos. O experimento foi conduzido em condições de campo, na Escola Agrotécnica do Cajueiro, no município de Catolé do Rocha, estado da Paraíba, Brasil. O solo da área é classificado como Neossolo Flúvico, com textura franco arenosa. O experimento foi conduzido entre os meses de junho de 2008 a junho de 2011. O delineamento experimental adotado foi o de blocos casualizados com 20 tratamentos no esquema fatorial 5x4 (doses x tipos) de biofertilizantes, com quatro repetições. Os resultados mostram que os tipos de biofertilizante não afetaram as variáveis de qualidade da produção; o comprimento e o diâmetro do fruto aumentaram com o incremento da dose de biofertilizante até limites ótimos; o comprimento do fruto das plantas do segundo ciclo foi superior ao das plantas dos primeiro e terceiro ciclos; o diâmetro do fruto das plantas do segundo ciclo foi superior ao das plantas dos primeiro e terceiro ciclos e os valores de ºBrix e de pH da polpa do fruto não foram afetados pelas doses de biofertilizante aplicadas.
Population expansion increases the water use for food production, which has stimulated farmers to cultivate vegetable with improved water use efficiency. The purpose of this meta-analysis study was to estimate the productivity gain of irrigated and fertilized forage palm plants (Opuntia ficus-indica (L.) Mill. and Nopalea cochenillifera (L.) Salm-Dyck) compared to non-irrigated ones. A systematic review was done and productivity average, tendency and dispersion measures were carried out from a search carried out between October 23 and 27, 2017, without any restriction of date and location and use of filters. Data were submitted to normality, hierarchical grouping, and meta-analysis tests. It has been observed that irrigated forage palm plant presents an increasing production of 53.54 t ha-1 year-1 when compared to non-irrigated and 80.25 t ha-1 year-1, with higher irrigation levels, and 26.83 t ha-1 year-1 with smaller water levels, with the possibility of even higher yields, especially in semiarid regions.
Two experiments were carried out to evaluate the effects of organic fertilization as an alternative to the chemical on the yield and quality of cherry tomato grown under different irrigation depths in protected environment, in 2013 and 2014. The experimental design was in randomized blocks (5 x 3 factor), with five irrigation depths as the factors (70%, 85%, 100%, 115% and 130% of ETc) and three types of fertilization: no fertilized soil (control), NPK fertilized soil (Chemical) and earthworm humus fertilized soil (organic). The following were evaluated in this study: water use efficiency, number of aborted flowers, total soluble solid content, transverse and longitudinal diameter of the fruits, number of fruits and fruit yield per plant. Organic fertilization is an alternative to the chemical with no losses in yield and fruit quality. The increase in water depth enhanced yield and fruit diameters and reduced water use efficiency. Water use efficiency was more sensitive to the increments in water depth than to different types of fertilization. The values of °Brix obtained in the experiment were classified as acceptable for the domestic and international market when submitted to organic fertilization.
The availability of nitrogen (N) in the soil influences the vegetative development of plants. However, the requirement is usually different between crops. The objective of the present work was to determine the fruit production and the SPAD index of pepper submitted to different amounts of nitrogen applied to the soil and applying this index in the production prognostic of the crop. The experiment was carried out under greenhouse conditions, Paraíba State, Brazil. The treatments were carried out in a completely randomized design, in a 3 × 5 factorial experiment, i.e., All Big, Yolo Wonder and Vermelho Samurai-Sais cultivars and five nitrogen fertilization doses (0, 33.33, 66.67, 100 and 133.33 mg kg-1 soil) with three replicates. At the time of flowering and harvesting of the peppers, the SPAD index was determined, using chlorophyll meter. The total production of fruits per plant was obtained weighing the fruits. Pepper production of all cultivars increased with nitrogen application at 120 days after sowing, using different soil nitrogen applications to reach their maximum productions. The Yolo Wonder cultivar had the maximum production (483.7 g of fruit/plant). The plants that presented SPAD index of 58.5 in the flowering stage showed the maximum fruit yield. The quantification of the SPAD index at the reproductive stages can be used in the prognosis of pepper production.
RESUMOO conhecimento da umidade do solo é relevante para a decisão de quando e quanto irrigar, para isto, são vários os métodos para determinação das condições hídricas em que o solo se encontra. Objetivou-se com este estudo comparar o teor de umidade obtido por diferentes métodos em Neossolo Flúvico do semiárido brasileiro. O experimento foi realizado em condições de campo no munícipio de Santa Luzia -PB. Utilizou-se os métodos padrão da estufa, forno elétrico e sonda FDR, nas profundidades de 0,0-0,5 m com sete repetições. Os métodos foram comparados através de indicativos estatísticos e dos valores de umidade do solo obtidos pelo método padrão, com aqueles determinados pelos métodos testados. O teor de umidade obtido pelo forno elétrico foi muito próximo do obtido no método padrão, além de melhor ajustamento entre os dados e maior coeficiente de determinação, diferentemente, os valores obtidos pela sonda FDR proporcionou uma maior variação quando comparado ao método padrão. O forno elétrico proporcionou desempenho ótimo em relação ao método padrão, enquanto a sonda FDR foi classificada como mediano. O teor de umidade do solo determinada pelo forno elétrico é uma alternativa viável para o manejo da irrigação, por ser de baixo custo e menor tempo de obtenção dos resultados 0,58 h quando comparado ao padrão da estufa de 24 a 48 h. Palavras-chave: conteúdo de água do solo; métodos alternativos; indicativos estatísticos. MOISTURE CONTENT BY DIFFERENT METHODS IN NEOSSOLO OF BRAZILIAN SEMIARID ABSTRACTThe knowledge of soil moisture is relevant to the decision of when and how much to irrigate, for this, there are several methods for determining the water conditions in which the soil is found. The objective of this study was to compare the moisture content obtained by different methods in the Neossolo Flúvico of the Brazilian semiarid. The experiment was carried out under field conditions in the municipality of Santa Luzia -PB. Was used the methods standard
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