Efeitos do preparo do solo e sistemas de irrigação na cultura do milho em Várzeas de Roraima.

Abstract

The present work aimed to evaluate mays cropping on wetland soils in rotation with the irrigated rice and compare the effects of different irrigation methods and soil preparation systems on mays and yield. An experiment was carried out from december/95 to april/96, on the experimental station of Bom Intento, Boa Vista-Roraima in geli slightly humid Tb alic, wetland soil.The BR 106 cultivar was tested under furrow and sprinkler irrigation, and two kind of soil preparation systems, as follows: plough grid + leveller grid and plough grid + aiveca plough + leveller grid. The experiment design consisted of a split plot on a randomized blocks design, with four replications.The soil prepared by grid + aiveca plough + leveller grid resulted in a height plants, compared to the average obtained in the soil prepared with grids only. On the other hand sprinkler irrigation proved, 100 grain mays wheight, grain number and higher yield (5.329,7 kg/ha).