Ajuste da lâmina de irrigação no desempenho agronômico da cultura do feijão

Abstract

One of the main crops for human diet in Brazil, the dry bean crop features a low national yield, which can be explained by the occurrence of water deficit events. In this way, this study aimed to evaluate the yield components, the grain yield and the water use efficiency of dry beans submitted to different ways to adjust the irrigation depth, and validate the Lâmina worksheet to recommend irrigation to the culture. The experimental design was a randomized block with four replications. It was used four treatments: non-use of irrigation; soil moisture equivalent to actual capacity of water in the soil at 45% of the total capacity of the ground water; soil moisture equivalent to 100% of the field capacity; and irrigation depth adjustment provided by Lâmina worksheet. The Lâmina treatment showed the best results for grain yield and water use efficiency, however the yield components were not significant, except for pods thickness. In this way, the Lâmina worksheet showed great potential, with high yield and contributing to the rational water use in dry beans.