Metodologia alternativa para o teste de condutividade elétrica na determinação do vigor de sementes de soja

Abstract

One of the biggest challenges in seed production is to increase production in rate to quality. The Mato Grosso State suffers greatly from the attack of plagues in the soybean reproductive stages and intense rains at harvest time, which makes it difficult to monitor and enter the seeds without damage to the processing. Thinking about that, the work seek an alternative methodology in the electrical conductivity test to facilitate the monitoring of pre and postharvest, so that decisions are taken faster and the damage related to the late discard of lots is reduced. Thus, the electrical conductivity of 6 different soybean seed lots from the Campo Novo do Parecis region was evaluated, using the mass system, with volumes of 50ml and 75ml for the soaking solution, temperatures of 25°C and 30°C, and conductivity measured at the of 4, 8, 16, 20 and 24 hours intervals. The results of the research are that the reduction of the imbibition time can be applied without the change in the final classification of the lots. It concludes that the imbibition period can be reduced to 16 hours with 75ml and 25°C or, the volume decreases to 50 ml and 25°C and to evaluate with 8h of imbibition.