QUALIDADE DE SEMENTES ESVERDEADAS DE SOJA ARMAZENADAS EM AMBIENTE REFRIGERADO

Abstract

The presence of greenish seeds in soybean reduces the quality of a lot, since the more intense is the green tone, the less vigorous is the seed. Therefore, to define the ideal storage conditions for green soy is of great importance, as it is the process that delays the seed deterioration, maintaining its quality. The objective of this study was to evaluate the physical and physiological quality of green soybean seeds of two cultivars stored in a refrigerated environment, being 8579RSF IPRO and ST777 IPRO produced in Lagoa da Confusão in the state of Tocantins. Three representatives of 500g were segmented into: representatives of the original unhandled lot, seeds classified as yellow and green seeds. These were stored in a refrigerated environment with a temperature of 15 ± 2 ºC and a relative humidity of 55 ± 5%. The following evaluations were performed: germination test, accelerated aging, tetrazolium, emergence in sand and mass of a thousand seeds in 0, 90 and 180 days of storage. Thus, it can be concluded that, the soybean cultivar ST 777 IPRO is the most sensitive to the presence of green pigments, causing a greater reduction in their vigor and viability. Soybean seeds with the presence of green pigments have a smaller mass of one thousand, which may also be related to their lower vigor. In general, refrigerated storage for 180 days is effective to maintain the quality of soybean seeds of the cultivars under study. However, they do not directly influence the quality of seeds with the presence of the green pigment, as they already had low quality since the beginning of the experiment.