Produtividade da água e de grãos em soja irrigada por aspersão convencional

Abstract

The objective of this work was to evaluate the water and grain yields in soybean crops, irrigated by conventional sprinkler irrigation. The work was conducted in the field at the Instituto Federal Farroupilha - Campus Alegrete, in the 2020/21 crop year. Sowing occurred in December 2020 under a no-till farming system and followed the recommendations for sowing density and cultural treatments required by the crop. The experimental design used was entirely randomized with four irrigation treatments (0, 50, 70, 100% of ETc), with nine repetitions each. At the end of the experiment, the yield components of the crop were analyzed and then the water yield was obtained. The results observed in this study show that with the increase of the irrigation layers, there is a linear decrease in water productivity, with the highest value observed in the layer with 0% replacement of ETc. However, irrigation is essential, since it was observed a significant reduction in grain yield for non-irrigated treatment, so the highest value corresponded to the blade of irrigation with the replacement of 100% of ETc. KEYWORDS: irrigation, water use efficiency, production.