Viabilidade econômica do milho (Zea mays) para grãos em plantio direto no sistema integrado de produção em recuperação de pastagens

Abstract

It was intended to evaluate the economic feasibility of the component corn in integrated system in no-tillage planting for either the formation or recovery of pasture in degraded areas of slopes, with chemically depleted soils in Piranga region-MG. The average results of ten experimentation units established in the year of 2008 in similar areas and utilizing the same technology were surveyed. The average value of corn production was not enough to cover the effective operational cost (COE) of the system (Brachiaria brizantha cv. Marandu + corn), there being, therefore, negative gross margin (R$356.20/ha). Nevertheless, in deducting from the COE of the system (R$1,685.20/ha) the COE unique to the pasture, (R$ 1,123.80/ha), which does not depend upon the presence or not of the corn, the COE unique to corn (R$561.40/ha) is obtained; and considering the average gross income (R$ 1,329.00/ha), less the corn COE (R$561.40/ha), the gross margin is positive (R$ 767.60/ha). The system proves viable as a method of establishment or renewal of pasture with low COE. Some agronomic adaptations will p romote improvements for the system in quantitative and qualitative terms.