NUTRIENTES EM LATOSSOLO CULTIVADO COM CANA-DE-AÇÚCAR (Saccharum spp.) SOB FERTILIZANTE ORGANOMINERAL DE LODO DE ESGOTO E BIOESTIMULANTE

Abstract

Sugar cane (Saccharum spp.) Has great economic importance in Brazil, being cultivated in several states such as São Paulo, Goiás, and Minas Gerais, among others, for its great potential to produce ethanol, sugar and reuse of its waste. With the expansion and intensification of their cultivation, it became necessary to look for more sustainable forms of production. The one that has been studied the most is the organic fertilization with the base of sewage sludge, since this source is economically more accessible, sustainable and promising. Treated sewage sludge (biosolids) is obtained by treating the sewage sludge present in sewage treatment plants (STP). The objective was to evaluate the macro and micronutrient dynamics of the soil in sugarcane fertilized with organomineral and mineral fertilizer, associated with the use of biostimulant, based on soil analysis. The treatment combinations were based on the recommendation of planting and cover fertilization for each environment, consisting of: 100% with mineral source and 0, 60, 80, 100 and 120% (with and without biostimulant) of the organomineral source based on biosolid. Stimulate® Biostimulant was used by spraying at planting. The experimental design was a randomized block with 5 x 2 +1 factorial, with five doses of organomineral fertilizer, with and without biostimulant and an additional one (mineral fertilization) in four replications. Increasing the doses of organomineral fertilizer of sewage sludge increases the Zn contents in the soil layer where the application was made. The increase of the doses of organomineral fertilizer of sewage sludge does not increase the contents of the other macronutrients and micronutrients of the soil. The organomineral fertilizer promotes nutrient availability similar to that of mineral fertilizer.