Influência da adubação foliar com fósforo na qualidade de sementes de soja

Abstract

Phosphorus is one of the most limiting macronutrient for soybean productivity, and it may influence the physiological quality of seeds. The focus of this study was to evaluate the effect of foliar fertilization with phosphorus used in different plant stages in productivity and physiological quality of soybean seeds cv. M6410 IPRO. The influence of Quimifol P30W foliar fertilization was measured in three different plant stages of development (V5, R2, R4) and the dose was 2,0 l ha. The crop parameters analyzed was weight of thousand seeds, number of pods, rate of empty pods, number of seeds per pods and productivity. The physiological quality of seeds was evaluated by germination, first score, rate of germination speed and emergence speed, field conditions emergence, tetrazolium test, seedlings performance, cold test and accelerated aging. The yield components of soybean seeds were not influenced by the period of foliar fertilization application with phosphorus. The application on V5+R2+R4 stages provided seeds with high germination and vigor determinated by the first score, rate of germination speed and length of aerial part.