Abstract:
The cultivation of off-season corn in Brazil is expressive, mainly because the cultivation of
soybeans in the first crop has been traditionalized and conditioning rotation with corn in the
second crop. Nitrogen (N) is one of the most required and important nutrients for good maize
crop development. Nitrogen fertilization is, without a doubt, one of the fundamental management
operations for success and yields. This work was carried out aiming to evaluate the effect of
different N sources in the off-season corn crop. The experiment was carried out on a farm in the
city of Paraguaçu, Minas Gerais, in the off-season of the agricultural year 2020/2021. The
treatments constituted different sources of N, being they: the control (without addition of N). T2
930g Polyblen 30-00-11 (0.279 kg/N), T3 607g 46% N urea (0.280 kg/N), T41.330g 21% N
ammonium sulfate (0.279 kg/N), T5 850g of ammonium nitrate 33% N (0.280 kg/N, and
T61.400g of polyblen 20-00-11 (0.279 kg/N). The experimental delineation was in randomized
blocks with six treatments and four replications. corn was harvested manually as soon as it
reached the maturation stage, then dry mass and green mass of the aerial part were evaluated.
control without any addition of N provided the best results, it is noteworthy that during the
period of execution of the research, the climatic conditions in the region were quite adverse, with
irregular rainfall and high temperatures; |
