Controle da umidade relativa e temperatura do ar na manutenção da qualidade de sementes de soja

Abstract

The objective of this study was to evaluate the physiological conditions of the seeds after storage, investigating soybean seeds under different storage environments, in temperature control and relative humidity (R.H.) situations, and uncontrolled environments of these factors, for a period of 90 days. To evaluate the physiological conditions, the seeds were submitted to the measurement of water content, germination and vigor (first count, dry weight of seedling and electrical conductivity). The experiment was carried out with 4 treatments and 6 repetitions in the form of completely randomized delineated, under the following conditions: treatment with controlled temperature was 13 ° C, treatment with humidity controlled air was 50% and environments without control of temperature and RH in warehouse and laboratory. According to the results, the seeds had lower moisture at the end of treatment, were submitted to relative humidity controlled at 50%. The soybean seeds stored in the warehouse and relative humidity controlled 50% did not differ in their results regarding the germination‟s test. However, the last treatment did not reach germination standards for commercialization. The first count test determined the different treatments similar to germination. For the electrical conductivity test were found the best averages in the treatments with temperature and relative humidity of the air and controlled lab environment. In biomass test seedling, the average did not differ significantly.