Influência do sistema de trilha na qualidade física e fisiológica de sementes de soja submetidas a períodos de armazenamento

Abstract

The aim of the work was to evaluate the physical and physiological quality of soybean seeds harvested with different track system after harvest and storage. The cultivar used was Syn 1059 RR (V Top), sown under no-tillage system in straw in day 25/10/2014 with sowing rate of 240,000 seeds per hectare spacing of 0.5 m. The treatments were different track system, where was evaluated: a) harvesters with axial track system; b) harvesters with axial track system equipped with "draper" platform; c) harvesters with radial track system; d) Control - manual threshing. Were analyzed the percentage of "splits", mechanical damaging by the hypochlorite test, germination, accelerated aging and field emergence. The highest values of mechanical damage, determinated by the hypochlorite test, were seen to radial track system, followed by axial and axial track system + "draper" and the lowest values for seeds harvested manually. The percentage of splits and mechanical damage were higher for the radial track system, being that, the seeds harvested with this system reached the minor germination values, accelerated aging and field emergence. The germination, accelerated aging and field emergence reached the lowest values in seed harvested radial track system, however, after storage, these results have remained only for the field emergence test. Seeds harvested with axial and axial track systems equipped with platform "draper" and manual track also did not differ for germination, results of accelerated aging and field emergence. The physical and physiological seed quality is superior when employed harvesters with axial and axial system + "draper", without differ from seeds manually harvested.