Operação da estrutura de secagem intermitente e qualidade de sementes de soja

Abstract

In processing, the drying process should be carried out very carefully to ensure good physical and physiological quality of the seed. The objective of this study was to determine the physical and physiological quality of soybean seeds during operation of intemittent drying structure. The work was conducted in the city of Planaltina-DF, the seed processing unit of a company in the region, the harvest 2015 samples being collected on 09.29.2015, a cultivar of conventional soybeans. After harvesting the seeds have passed by the receiving and pre-cleaning, being stored in bins 150 tons subjected to an aeration system for further drying of intermittent dryer. In the dryer, the seeds were submitted to drying air temperature around 55 ° C, and mass temperature of seeds at 40 ° C. The treatments consisted of seed sample collection in four positions in the operation of the drying structure, as follows: Bin output damp; Before the dryer; After the dryer; Entry into the dry bin. Six collections were done at each position spaced within two minutes of each other, consisting of six replications. Were made the following assessments in the collected seed samples: humidity, damage Mechanical for Hypochlorite, Germination, Vigor, Viability and Accelerated Aging. The design was completely randomized with six replications. Data were subjected to analysis of variance and having significance, the averages were compared by Tukey test at the level of 5% probability. It concludes that the use of intermittent dryer for soybean drying, although not change the immediate physiological seed quality, provides high increase in mechanical damage percentage, when not working at full load.