Desenvolvimento inicial e produtividade da cultura do milho no sistema de integração lavoura-pecuária

Abstract

Crop-livestock systems may be defined as the integration of two activities aiming to rationally maximize the land use and to decrease production costs. The objective of this study was to evaluate the effects of different heights of remaining pasture and seed drills on the yield of corn grown in sequence. The treatments consisted of combinations of four remaining pasture residue heights (0,05; 0,15; 0,30 m and ungrazed) and two planter furrow openers on seed drills (shoe and disk), used for seeding after grazing. After corn sowing, the depth of seed deposition, the rate of seedling emergence, initial stand of plants, initial and final plant height and crop yield were evaluated. The different grass heights .significantly influenced the depth of seeding, the initial height and insertion of first cob and grain yield. Pasture height of 0,05 m corresponded to the lowest seed depth when compared with the other heights. The different furrow openers affected only the depth of seeding.