Ajuste da lâmina de irrigação na produtividade da cultura do feijão

Abstract

The Bean (Phaseolus vulgaris L.) is one of the most produced grains in Brazil and stands out as the population main food source. In spite of the expressiveness, there is an oscillation in national production, due the low water availability during the crop cycle, allied to region climatic conditions. So, the purpose of present study was evaluate bean yield components and culture performance submitted to different irrigation levels, and to validate the LÂMINA spreadsheet. The experiment was conducted at experimental area of Federal University of Fronteira Sul, in Erechim - RS, in a completely randomized block design with four replications in four treatments, being them, without irrigation; Maintenance of soil moisture equivalent in 100% of field capacity; Maintenance of soil moisture equivalent to the actual soil water capacity in 45 % of total soil water capacity; adjustment of irrigation level according to values from LÂMINA spreadsheet. In all treatments, grain yield, amount of crop´s water received, 1000 grains weight, biomass and efficiency of water use were determined. Due to rainfall good distribution of over period, no significant differences (P>0.05) were observed for yield components, except for pod length, where treatment Maintenance of soil moisture equivalent in 100 % of field capacity, showed better results than other treatments.