Common beans genotypes behavior under nitrogen stress in the cerrado

Abstract

Although being a culture with broad adaptation and geographic distribution, the common bean has encountered some limiting factors to obtain high yields, including nitrogen fertilization. Thus, this work aimed to evaluate the performance of common bean genotypes in three between harvests under conditions of low level of nitrogen in soils of Cerrado. The experiments were conducted in the field at the Experimental Station of the Federal University of Tocantins in the between harvests of the years 2010, 2011 and 2012. The experimental design used was the randomized block one with four replications in a 6x3 factorial scheme. For the environment simulation with low nitrogen availability was performed nitrogen fertilization only at planting at a dose of 20 kg ha-1 N. The Princesa genotype was noted for always compose the two groups with the highest averages for all the evaluated characteristics and obtain higher yields to 1,600 kg ha-1 in more than a year of cultivation.