Qualidade de sementes de arroz de sequeiro utilizado na agricultura familiar em Araguatins– TO

Abstract

This study Aimed to compare the physiological quality during storage of two upland rice seeds types, separated during threshing, by the family farmers of Araguatins - TO. The experiment was established at the Federal Institute of Tocantins Campus Araguatins. Samples of seeds are sent to be analyzed in Seed Analysis Laboratory of Federal University of Pelotas, at the beginning and end of the storage period. Rice seeds were used, to the cultivar Agulhinha, the treatments consisted of the combination of the ways of obtaining seeds, or obtained under the threshing bench called Type 1 seed and seed during threshing process jumped away from the bench (more than a meter), Seed called Type 2. That was combined with six evaluation periods (40, 70, 100, 130, 160 and 190 days after harvesting), totaling 12 experimental treatments with four replications. To evaluate germination, emergence to field and laboratory, first count, emergence speed index, weight of 1000 seeds. The results showed no significant difference between seeds TYPE 1 and 2 in all response variables, except those of 40, 100 and 130 days after crop emergence in the laboratory. The selection system of upland rice seeds used by farmers to Araguarina - TO is not effective in separation of seeds by physiological quality.