The species Cajanus cajan L. where pigeonpea is from presents a harvest potential in tropical regions for it is used as human and animal feed, besides being used as green fertilizer. However, the harvest area of this Fabaceae is still insignificant, due to especially the lack of quality seeds. In this context, it is possible to affirm that drying and store are portrayed as important steps for obtaining superior quality seeds. The aim of this study is to evaluate the physiologic quality of dwarf pigeonpea seeds, with different water content during storage. A factorial scheme 3 × 6 was adopted in the delimitation completely randomized, with four replications. Treatments were constituted by the combination of lots of seeds containing three different water contents (11%, 14% and 16%), submitted to a 10-month storage period, with evaluations every two months (0, 2, 4, 6, 8 and 10). Seeds were stocked in a bag type kraft under normal lab conditions, that is, no control. Physiologic quality of the seeds was evaluated through the following tests: Germination Pattern Test-GPT, first count of germination, accelerated aging and electric conductivity. It can be concluded that pigeonpea with hard seeds containing water content at 11% existing superior physiologic quality throughout the 10-month storage, under no controlled condition, certainly promoted by the less intense breathing from the reserves cumulated in the seed lot. Pigeonpea seeds storage with water content superior to 14% promotes a sharp decrease of physiologic quality, due to an increase in metabolic activity.
This study was to evaluate the nutrition and the agronomic part of bean intercropped with castor crops submitted to sources and levels of B in the Anápolis-GO, Brazil. The treatments consisted of two sources of B (borax = 11% B and boric acid = 17% B) combined with five levels of B (0.0, 0.5, 1.0, 2.0 and 4.0 kg ha -1 in soil) in bean intercropped with castor, plus monoculture, using 1.0 kg ha -1 B. That leaf levels of B and S in beans, and of B, N, Ca, Mg and Fe in castor were influenced by the sources and levels of B in the intercropping. The bean yield intercropped with castor was not influenced by borated fertilization, neither by the interaction of factors. The highest yield of castor intercropped with beans, 2.040 kg of grains ha -1 , was obtained with the 1.9 kg ha -1 of B, regardless of the source used.
O objetivo do trabalho foi avaliar as diferentes concentrações de cloreto de cálcio visando maior vida pós-colheita do maracujá ‘BRS Pérola do Cerrado’. O experimento foi em delineamento inteiramente casualizado, com quatro repetições, em esquema fatorial 5x8, sendo cinco concentrações de cloreto de cálcio (0 % CaCl2, imerso em água destilada; 1% CaCl2; 2% CaCl2; 3% CaCl2; e 4% CaCl2) e oito dias de análises (0, 3, 6, 9, 12, 15, 18 e 21 dias). Foram avaliados: firmeza de casca, acidez titulável, luminosidade, ° Hue e Croma. Os dados obtidos das variáveis analisadas foram submetidos à análise de variância (P≤0,05), quando significativos, foi realizado o teste de comparação de médias Tukey a 5% de probabilidade e análise de regressão. Nas condições em que o experimento foi realizado, a submissão do maracujá silvestre ‘BRS Pérola do Cerrado’ ao tratamento pós-colheita com cloreto de cálcio não influenciou significativamente em nenhuma das variáveis em estudo.
o processo de secagem tem papel significativo nas perdas da qualidade do produto, uma vez que seu manejo incorreto ocasiona deterioração do produto, ao longo do armazenamento. Sendo assim, o objetivo deste trabalho foi a determinação e modelagem matemática das curvas de secagem de sementes de maracujá ‘BRS’ Pérola do Cerrado. Foi utilizado o programa computacional Statistica versão 13.0, para ajuste dos modelos utilizados. Foram feitas análises de regressão não linear, pelo método Gauss-Newton. O grau de ajuste de cada modelo considerou a magnitude do coeficiente de determinação, a magnitude do erro médio relativo e do desvio-padrão da estimativa. O tempo necessário para a secagem das sementes de maracujá ‘BRS’ Pérola do Cerrado até o teor de água de equilíbrio com o ar ambiente foi de 8; 6,5 e 6 horas, para as temperaturas de 30; 40 e 50 °C, respectivamente, evidenciando que o tempo requerido para a secagem dessas sementes, depende da temperatura de secagem. O modelo matemático logarítmico, utilizado para caracterizar a secagem, foi o que melhor representou o processo de secagem das sementes de maracujá ajustando-se satisfatoriamente aos dados experimentais.
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