Efeito residual da adubação sulfatada na cultura da soja

Abstract

The soybean (Glycine max) is one of the main crops cultivated in the world, being also the legume with greatest economic importance in the world. The average productivity of culture is still below its productive potential, but this can be improved with the use of some nutrients in fertilization, among them, the sulfur can be one of the limiting factors for greater productivity. The objective of this study was to evaluate the behavior of the soybean crop in relation to the characteristics of the plant and its productivity in a soil with low levels of sulfur (<5 mg dm-3) using fertilizers that contain different sulfur sources as its composition, moreover, were also tested, different dosages of fertilizer made in the cultivation of maize and residual effect in soybean crop in the cerrado region. The sulfur sources used were: MES - 15 THAT IS MAP + S containing 50% of S-SO4 and 50% of elemental sulfur-containing S, addition of N and P. The S-elemental, containing 90% of S. and finally the ammonium sulfate with 20% of S. The doses used were 0, 5, 10, 25 and 50 kg/ha. The experiment was deployed in no-tillage system. The characteristics of plants as well as their productivity did not differ statistically, thus there was no increase in productivity.