Potencial produtivo de Urochloa híbrida submetida a aplicações de ureia, fertilizantes foliares e bioestimulantes na época da seca

Abstract

Pasture is the largest agricultural crop in Brazil. In contrast, 80% of the cultivated pastures are in some degraded state. Foliar fertilizers and biostimulants promote a nutritional and hormonal balance, respectively, giving the plant a better development. However, there are few studies on the application of these products in forages. Considering the above, the objective of this work was to estimate the productive potential of Urochloa hybrid Convert HD364, in the dry season, submitted to combinations of Starter, Mastermins Pastures, Stimulate and Nitrogen applications. The experiment was carried out at Fazenda Capim Branco, located in the city of Uberlândia. The experimental design was DIC, with 7 treatments and 3 replicates. The treatments used were: control, application of 30 kg ha-1 of N (urea); 30 kg ha-1 of N (urea) + 3.0 L ha-1 of Mastermins® Pasture; 30 kg ha-1 N (urea) + 3.0 L ha-1 Starter®; 30 kg ha-1 N (urea) + 0.5 L ha-1 Biostimulant; 30 kg ha-1 of N (urea) + 3.0 L ha-1 of Mastermins® Pasture + 0.5 L ha-1 of Biostimulant; 30 kg ha-1 of N (urea) + 3.0 L ha-1 of Starter® + 0.5 L ha-1 of Biostimulant, applied in each cycle, after cutting. The production and rate of forage accumulation, percentage of morphological components and nutritive value (NDF, FDA and CP) were evaluated. The Tukey test at 0.05 of significance was used in the analyzes. As a conclusion it was obtained that the addition of urea, foliar fertilizers and biostimulant increases the production of dry mass of forage, leaves, stems and dead material; The biostimulant, associated or not to foliar fertilizers, increases the production of dead material; The urea isolated or associated with the biostimulant and leaf fertilizers Starter and Mastermins Pastures did not influence the percentage of stalks, in relation F: C, and in the concentrations of FDA, NDF and PB; The addition of the biostimulant in the urea associations with the foliar fertilizers provides an increase in the Forage Accumulation Rate; The association of urea to leaf fertilizer Starter and biostimulant has the best results for all parameters. In the dry season, the production and the nutritional value of the forage are smaller.