Rendimento e qualidade de grãos de soja em função da classificação de semente

Abstract

A classification of the average soybean is an important technique to obtain the desired plant population and, consequently, good yield of the crop. The objective of this study was to evaluate an influence of seed size on the physical and physiological properties of soybeans after harvesting. A randomized complete block design with three replicates. As evaluated cultivars were: Nidera and M8210. As sieves for the Nidera seed classification were: 6.0; 6.5; 7.0; 7.5 mm; and Monsoy (M8210) were: 6.0; 6.5; 7.0; 7.5; 8.0 mm. The productivity, bulk density and real density, characteristics related to the size and shape of the grains (volume, geometric diameter, sphericity, circularity and mass of the grain), mass of 1000 grains, and percentage of germination were determined. The data were submitted to analysis of variance by the F test (p <0.05), and as averages compared by the Tukey test at 5% probability. The results indicated statistical difference for the bulk density of cultivar M8210 with difference of up to 2.2% between values, the highest value observed was for classification with sieve screen of 8.0 mm. Regarding productivity, an important difference was observed for an M8210 cultivar. There was variation in relation to the average productivity, from 6.8 sc ha-1to more, and from 6.6 sc ha-1 to less, when performed a classification of seed by packages. The other physical characteristics did not present significant variations, thus not showing significant influence of seed size on the characteristics of the grains produced.