ABSTRACT
The objective of this research was to evaluate the effect of nitrogen fertilization, applied through irrigation water, on grain yield, dry matter production and nitrogen absorption by bean crop (Phaseolus vulgaris L). The statistical design was the randomized blocks with split plots and five repetitions. Urea fertilizer was used as the nitrogen resource, applied at a rate of 40kg/ha. The treatments were: i) plots without nitrogen fertilizer covering the soil surface; ii) plots with nitrogen fertilizer covering the soil surface, applied once manually 30 days after germination; iii) plots with nitrogen solution applied by sprinkle irrigation water at 30, 42 and 50 days after germination. The results showed that nitrogen fertilization increased significantly the grain yield and nitrogen absorption by plants. The nitrogen fertilization applied through irrigation water favored better results, comparing to the one applied at once and manually.
Key words:
irrigation; nitrogen; bean