Nutrição mineral do feijoeiro sob influencia de nitrogênio e palhadas de milheto solteiro e consorciado com crotalaria

Abstract

The grassy x leguminous intercropping result in a straw with intermediate C/N relation, if compared with the isolated plants, associating the straw durability with the nitrogen supplied to the sub sequentially plants. Thus, this study objective was to evaluate the millet (Pennisetum typhoides (Burm.) Stapf) and millet plus Crotalaria juncea (L.) DC. intercropping, in combination with nitrogen fertilization levels on summer/autumn bean mineral nutrition, in no-till. The experiment was carried out at Federal University of Lavras (Lavras, Minas Gerais state, Brazil) in a randomized blocks design and four replications in split plot arrangement, with the straws in the plots and nitrogen levels at sowing (30 e 60 kg ha -1 ) and at topdressing (0, 40, 80 and 120 kg ha -1 ) in a factorial (2 x 4) + 1 in sub-plots, plus an additional treatment with 30 kg ha -1 at sowing and bean seeds inoculation by Rhizobium tropici with Co and Mo foliar appliance. The dry bean macro and micronutrients contents and accumulation was determined. The nitrogen topdressing levels increased the N and Mg foliar contents. The inoculation and Mo plus Co foliar appliance reduced the Ca content under millet plus Crotalaria juncea intercropping straw and increase the Cu content under millet straw.