Temperatura de secagem e qualidade de sementes de arroz

Using high quality seeds is important for the influence or yield of crops. The quality of the seeds can be observed during several different production processes, including the drying process, such as the inhibitory use or the water content of the seed mass, thus decreasing its metabolic activity and pest incidence. The objective of the work to evaluate the effect of drying temperature on the initial quality of rice seeds. For the tests, rice seeds of the cultivar IRGA 424 RI were used with a water content of 22%. After harvesting, seeds were divided into two temperatures, they were dried at different temperatures, the first experiment consisted of two temperatures of 30 and 37 ° C in the seed mass and the second experiment of four temperatures of 25, 30, 35 and 40 oC ± 2 ° C with false-bottom stationary dryers. After drying, the seeds were evaluated for physiological quality by testing the first germination count (PCG), germination (G) and seedling length (CP). The collected data were submitted to the Tukey test with 5% significance. The results indicate the analysis of two experiments with the use of a temperature of 40 ° C in the seed mass that provides rice seeds of the cultivar IRGA424RI with higher initial quality.