Teste de condutividade elétrica em sementes de feijão miúdo (Vigna unguiculata)

Abstract

Resumo: O feijão-miúdo (Vigna unguiculata) apresenta multiplicidade de usos, que o torna boa opção para os agricultores, podendo ser utilizado além de recuperador de solos, como forragem verde, na alimentação animal e destaque na consorciação com gramíneas de alto potencial de produção. Objetivou-se adequar o teste de condutividade elétrica para avaliação do vigor de lotes de sementes de feijão miúdo. Foram utilizados três lotes de sementes da variedade Amendoim e da variedade Mosqueado. Para avaliar a qualidade fisiológica foram conduzidos os seguintes testes: germinação, envelhecimento acelerado, massa seca de plântula, área foliar, emergência e índice de velocidade de emergência. O teste de condutividade elétrica foi realizado com 25 e 50 sementes embebidas em 75 mL e 200 mL de água destilada, a 20º C, por 2, 4, 6, 8, e 24 horas e o delineamento experimental utilizado foi inteiramente casualizado com 4 repetições. As demais variáveis: germinação, índice de velocidade de emergência, envelhecimento acelerado, massa seca de plântulas, área foliar e emergência, não permitiram diferenciar os lotes, sendo que o teste de envelhecimento acelerado e massa seca mostraram-se contraditórios. O teste de condutividade elétrica não foi eficiente na diferenciação dos lotes analisados. Palavras-chave:Vigna unguiculata L.; Vigor; Qualidade fisiológica. Abstract:The cowpea bean (Vigna unguiculata) shows multiple uses, which makes it good choice for farmers and can be used in addition to soil recovery, as green fodder in animal feed and featured in intercropping with high production potential grasses. The objective of this work was to adjust the electrical conductivity test to evaluate the effect of lots of cowpea bean seeds. Three lots of seeds of two varieties mosqueado and amendoin were used.nTo evaluate the physiological quality, the following tests were conducted: germination accelerated aging, dry weight of seedling, leaf area and emergency and emergency speed index. The conductivity test was carried out with 25 and 50 seeds soaked in 75 mL and 200 mL of distilled water at 20 ° C for 2, 4, 6, 8, and 24 hours and the experimental design was completely randomized with four replications. The other variables: germination, emergence speed index, accelerated aging, seedling dry mass, leaf area and emergence did not vary between lots, and the accelerated aging test and dry mass proved to be contradictory. The electrical conductivity test was not effective in differentiating lots analyzed.

Calidad fisiológica de la semilla de fríjol caupí (Vigna unguiculata L. Walp.) por conductividad eléctrica y prueba de germinación

“…The dry weight of seedlings registered highly significant differences between the genotypes (Tab. 4), the results contrasted with those of Xavier et al (2017), when seeds from different batches of the same cultivar were used. The dry weight was the same for cultivars C-001, C-Valledupar, C-Tierralta and IT86, but not with L-026, which is related to the loss of viability and lower growth, a situation that varies between species and cultivars within the same species, as argued by Shaheen et al (2019).…”

“…It was determined in conjunction with the germination speed index. For this, 10 normal seedlings of each replicate, were subjected to drying for 72 h in an oven with circulating air at 60°C (Xavier et al, 2017) until reaching a constant weight (in g), measured on an OHAUS precision balance, to two decimal places.…”

“…is a tropical and subtropical plant of social, economic, and nutritional importance in the Caribbean region, as it is used as a source of protein, calories, fiber, minerals, and vitamins (Araméndiz-Tatis et al, 2019). It is characterized as being precocious and drought tolerant, since it can adapt to different agroclimatic conditions in the production systems of the semi-arid regions of the tropics (Xavier et al, 2017).…”