Agronomic efficiency of nitrogen use in corn genotypes and correlation with agronomic traits

Looking for to assess the agronomic nitrogen use efficiency (NUE) in different environments and correlation with agronomic characters in corn genotypes, they were evaluated 29 corn genotypes in four experiments, two with seeding organic fertilization. The experiments were deployed in Gurupi-TO on 2010, evaluated these characters: weight hectoliter, weight of 100 grains, grain yield and NUE. The genotypes had shown higher values of NUE under mineral fertilization of seeding without fertilization in coverage, producing 219.9 kg grain-1 per kg N-1 applied. It’s possible to conclude that there is a possibility for indirect selection of genotypes productive and efficient for organic fertilization conditions through choice of efficient genotypes under nitrogen stress conditions.