Consórcio milho e Brachiaria brizantha submetida à inoculação com Azospirillum brasilense e nitrogênio

Abstract

One of the strategies to solve the problems arising from the intensive use of the soil is the succession of two harvests of corn for serious silage, the intercropping of maize and brachiaria. The work is evaluated and the quality of corn for silage in response to the consortium with Brachiaria brizantha cv. Piatã and inoculation with Azospirillum brasilense, under doses of nitrogen under cover in two successive harvests of corn silage. The experiment was carried out in a randomized complete block design with three replications, in a factorial scheme with sub - divided plots. The main objective was the use or not of a consortium with corn Brachiaria brizantha cv. Piatã, in the subplot with and without inoculant Azospirillum brasilense and in the sub-plot as nitrogen doses of 0, 100, 200 and 300 kg ha-1. In the maize crop, the variables evaluated were dry matter, leaf nitrogen and plant nitrogen. In braquiated the dry material production and nitrogen contents were observed. The inoculant did not differ in any analyzed variable and the consortium impaired corn biomass production only in the off season. Nitrogen rates influenced all variables in the crops, with the exception of nitrogen levels of the entire plant in the second crop. In order to inoculate does not influence the production of corn and brachiaria. In the harvest the brachiaria interferes only in the nitrogen level of the leaves and the maize plant, and in the safrinha the brachiaria interfered negatively in the corn production.