Fertilizante mineral e resíduo orgânico sobre características agronômicas da soja e nutrientes no solo

Abstract

Brazil is the second largest soybean producer in the world, but this production is often limited by high production costs, and between inputs, fertilizer is the most expensive. The use of organic waste is interesting, as well as reducing environmental impacts and can reduce the cost of production. The objective of this study was to evaluate the use of mineral fertilizer NPK associated with the organic waste "poultry litter", in agronomic characteristics of soybean and levels of nutrients in a Cambisol in southern Minas Gerais state, Brazil, the experiment was carried out in Itutinga - MG. The cultivar used was BRS Favorita RR. The experimental design was randomized blocks with three replications in split-plot. The treatments applied to plots were 0, 3, 6 and 9 Mg ha-1 of organic waste "poultry litter", applied in total area, in subplots were used 0, 100, 200, 300 and 400 kg ha-1 mineral fertilizer NPK 04-30-10, in the groove seeding. It was found that fertilization with mineral fertilizers provides an increase in plant and first pod height, number of pods per plant and yield of soybean. Fertilization with organic waste "poultry litter" elevates the plant and first pod height, weight of 100 grains, number of pods per plant and yield of soybean, however at higher doses favors the lodging of plants. The use of poultry litter is viable in terms agronomic and economic in soybean crop. The addition of poultry litter increases the contents of potassium and sulfur in the soil.