Efeitos da adubação orgânica, associada ou não à adubação química, calagem e fosfatagem, nos rendimentos agrícola e de aguardente teórica da cana-de-açúcar (Saccharum spp)

Abstract

The effects of different organic fertilizers associated or not to the mineral fertilizers was evaluated, in the cane yield and theoretical of sugar-cane brandy, during plant cane cycle and first ratton. An experiment on field was accomplished in area of “Cachaça João Mendes” farm, in Perdões-MG, in Typic Hapludox. The experimental design was of randomized blocks, with nine treatments and four replications. The treatments were constituted for: Limming + phosphate reagent + chemical fertilizer; Phosphate reagent + chemical manuring; limming + chemical manuring; Limming + phosphate reagent + chemical manuring + cattle manure; Limming + phosphate reagent + cattle manure; Limming + phosphate reagent + chemical manuring + chicken manure; Limming + phosphate reagent + chicken manure; Limming + phosphate reagent chemical manuring + cane bagasse; Limming + phosphate reagent + cane bagasse. The cattle manure was applied in the dose of 30 t ha -1 , humid base, and the chicken manure in the dose of 3,5 t ha -1 , in the planting furrow for plant cane, and in the interline for first ratton. The cane bagasse was applied in the planting furrow in the base of 24 t ha -1 and spread on the interline in the base of 35 t ha -1 for first ratton. The limestone was applied in total area, before the planting, in the dose of 2,5 t ha -1 and the phosphate reagent was in the dose of 400 kg ha -1 in the planting furrow and after first cut. The chemical manuring was applied in the base of 120 kg ha -1 of K2O and 120 kg ha -1 of P2O5 in the planting furrow and 80 kg ha -1 of N and 80 kg ha -1 of K2O after first cut. The variety of cane was SP79-1011. The cattle manure applied in the furrow and reapplied after the cut was the only organic source capable to substitute the chemical fertilization of plant cane and of the first ratton; the cane bagasse, when used as organic source, applied in the furrow and reapplied after the cut, it should always be complemented with the chemical fertilization of planting and of the first ratton; there was not effect of the organic fertilizers, applied in the furrow and reapplied after the cut, associated or not with the chemical fertilization in the rate of AR, ATR, Pol and Purity (%) cane, so much for cane plants as for the first ratton; the limming and the P2O5 application didn't affected, separately, in the productivity of cane and theoretical sugarcane brandy of the plant cane and of the first ratton.