Temperatura de armazenamento e germinação de sementes de soja

Abstract

The viability is measured mainly by the germination test, which seeks to determine the maximum seed germination in the most favorable conditions of humidity and temperature, accurate predictions of seed deterioration under climate change in the warehouse, therefore, are of great value for seed producers. The objective of this study was to evaluate the influence of temperature and storage time on the physiological quality of soybean seeds. The experimental design was completely randomized in a factorial 4 x 8, consisting of five temperatures (6 °C, 18 °C, 25 °C and 33 °C) and seven storage times (0, 28, 56, 84, 112, 140, 168, 196 days), with four replications. The variables were viable seeds, abnormal seedlings and dead seeds. Soybean seeds stored for a period of 196 days in temperatures of 6 to 18° C keeps the germination. During storage at temperatures of 25 and 33° C, germination decreased 1.5 percentage points per month, at the temperature of 33° C increases the incidence of abnormal seedlings and temperature of 25° C increases the incidence of dead seeds.