Influência do tamanho da semente na qualidade fisiológica e na produtividade da cultura da soja

Seed size has received special attention by researchers, who have studied aspects related to seed performance and the resulting plant. The objectives of this study were to evaluate the effects of seed size on initial plant growth, grain yield and the physiological seed quality of soybeans by testing seeds of three cultivars (BRSMG 752S, BRSMG 790A and BRSMG 750SRR), graded into three sizes (4.0 mm, 5.0 mm and 6.0 mm). No-till planting was done on December 6 th , 2007 and the plants thinned 21 days after emergence to 13 plants per meter. Harvesting and seed threshing were done manually on April 11 th , 2008. After harvesting, seeds were manually graded into three sizes by using round perforation screens of 6.0 mm, 6.5 mm and 7.0 mm. The field trials were set up in a