The diagnosis based in nutrient contents in plants can be efficient to identify nutritional deficiency and toxic levels and associated with increasing fertilization in bean plants, reinforce the necessity of studies in this area. To study the effect of N and P2O5 doses on the levels of macronutrients in the shoot of the common bean cv. BRS-MG Talismã and in grain yield, it was conducted a field experiment in the winter of 2002, in Lavras, State of Minas Gerais, Brazil. A randomized complete block design was used with three replications and a factorial scheme 4 x 4 involving four N doses and four phosphorus doses. At full flowering, the plants were picked and divided in leaves + petiole, flowers + pods and beanstalks + branches for macronutriente levels determination. The data were submitted to analyses of variance and regression. Increasing N in the fertilization raised levels of N, P and K in leaves + petiole, N, K and Mg in beanstalks + branches and N and K in flowers + pods of common bean. Levels of S and K in flowers + pods decreased when N and P2O5, respectively, were enhanced. The changes in macronutrients levels in shoot of the common beans cv. BRS MG-Talismã were within adequate standards, even when using fertilization doses for maximum productivity of common bean.
Phaseolus vulgaris; leaf analysis; fertility; fertilization
