Produção de palha e grãos do consórcio milho-Braquiária: efeito da população de plantas de Brachiaria ruziziensis

Abstract

There is now a global concern with the agroecosystem sustainability, competitiveness and exonomic viability of agricultural activities. Intercropping of winter maize with forage grasses have been studied because of its benefits in relation to biomass production per area. Objective of this study was to evaluate the interference of density Brachiaria ruziziensis cv. Common intercropped with the winter maize in grain yield, in dry mass and nutrients of forage. The experiment was conducted in soil characterized and Oxiol under conditions of degraded pasture in the Technical School Prof. Luíz Pires Barbosa Cândido Mota city (SP). The experimental desing was randomized blocks with five treatments and four replications. The treatments consisted of the population of B. ruziziensis 2.5; 5,0; 10,0; e 20,0 plants per linear meter and simultaneously sown between the lines of winter maize (0,90m). It was concluded that the values of agronomic evaluation of maize analyzed showed no interference of the treatments, only the height of attachment of spikes was affected by populations of B. ruziziensis; the intercropped presented B. Ruziziensis winter maize with increased grain yeld cereal with a population up to 9,5 plants per linear meter of forage; the total production of dry B. ruziziensis showed higher response to the population at the expense of desiccation in their time of physiological maturity of maize; the accumulation of macro and micronutrients in B. ruziziensis increased as function of the populations with the exception of potassium and iron.