FERTILIZANTES ORGANOMINERAIS COMO ALTERNATIVA A ADUBAÇÃO CONVENCIONAL DA SOJA

Abstract

Would it be possible that organomineral fertilizers, combining the advantages of organic and mineral fertilizers, present sufficient efficiency and sustainability to become a viable and efficient alternative to conventional mineral fertilization in soybean crops? The use of organomineral fertilizers promote improvements in soil and plant fertility, generating environmental benefits and, consequently, making productivity more sustainable over time. Thus, the present study aimed to evaluate the efficiency of organomineral fertilizers replacing conventional soybean fertilization in terms of growth characteristics, production components and grain yield. The experiment was conducted in the experimental area of the Federal University of Mato Grosso do Sul, campus of Chapadão do Sul-MS. An experimental design in randomized blocks was used, with ten treatments and four replications. Control treatments, without fertilization; mineral fertilization with monoammonium phosphate (MAP); organomineral fertilization with Supergan; organomineral fertilization with Supergan Plus. Both for mineral and organomineral fertilization, doses equivalent to 50, 70 and 100% of the recommendation were used and consisted of the isolated application of mineral and organomineral fertilizers. Evaluations included plant height, first pod insertion height, number of branches per plant, number of grains per plant, grain mass per plant and grain yield. The use of mineral fertilizer at doses 70% and 100% promoted gains of 17.4% in grain yield when compared to the control, while organominerals at doses S50, S70, S100, SP70 and SP100 were able to overcome, on average, 15 .2% the control. The use of mineral and organomineral fertilizers were favorable to plant growth, production components and soybean grain productivity.