DESEMPENHO AGRONÔMICO DO FEIJÃO-COMUM FERTIRRIGADO COM BORO E ZINCO

Abstract

Based on the hypothesis that the application of micronutrients in cerrado soils, such as boron and zinc, potentiate the grain production of common bean, the objective of this work was evaluate the combined effect of boron and zinc application on the growth, development and productivity of irrigated common bean. The experimental design used was randomized blocks, analyzed in a subdivided scheme 5 × 2, with four replications. The treatments consisted in five doses of zinc (0, 5, 10, 15 and 20 kg ha-1); and two levels of boron fertilization (with and without boron). Fertigation with zinc was performed at phenological stage V3/V4 and boron was in the flowered (R5). The cultivar used as Seed of BRS Estilo. We measured the plant height, number of amongeses, total dry mass, number of leaves, leaf area, SPAD index and NDVI, at 50 days after seeding, and at harvest, were measured: number of grains, number of pods per plant, total grain mass, grain yield, sacks per hectare. The data were submitted to variance analysis by the F test at 5% probability and when significant, regression analysis was aplyed for zinc doses and the Tukey mean test at 5% probability for the boron factor, using the statistical software SISVAR®. The increase in zinc doses associated with the addition of boron provided a linear increase in the variables of grain mass, yield and sacks per hectare.