Sistemas de irrigação e preparo do solo para a cultura do feijão caupi (Vigna unguiculatya (L) Walp) em Várzea de Roraima.

Abstract

The present work aimed to evaluate the caupi bean cropping on wetland soils in rotation with the irrigated rice and compare the effects of different systems of irrigation and soil preparation on the element production and productivity of cultivated fields. An experiment was carried out in december/95 to april/96, on the experimental station of bom intento, Boa Vista-Roraima in geli slightly humid Tb alic, wetland soil..The always green cultivar was tested under furrow and sprinkler irrigaton and two kind of soil preparation systems, as follows: plough grid + leveller grid and plough grid + leveller grid + aiveca plough. The experiment design consisted of a split plot on a randomized blocks design, with four repetitions. The number of bean stick per square meter , number of grains per bean stick , the weight of a 100 grains and the productivity of grains. There weren’t any differences, statistically significant on the production element and neither on the irrigated caupi bean under the irrigation system and tested soil preparation, obtaining an average yield of 1.554,31 kg of grains per acre.