The impact of different levels of nitrogen fertilizer on maize hybrids performance under two different environments
Year: 2021
Type: article
Abstract: to compare maize hybrids (H) and nitrogen (N) rates, growth, yield and yield components, using a split plot design with three replications in 2017 and 2018.The main plots were supplemented with one of the following levels of N (kg ha -1 : 100 (N1), 175 (N2), N3 (250), N4 (325), and N5 (400) using three different hybrids (H), H1 (P-3939), H2 (30-T-60), and H3 (30-Y-87) in the sub-plots.Data were analyzed using the MIXED procedures of SAS.The statistical models included the individual effects of N and H, the interactions between N and H, and the random effect of the year.Orthogonal polynomial contrasts were constructed to determine the optimum level of N. The yield and yield components were improved at 325 kg N ha -1 with significant effects on maximum plant height, number of grains per cob, number of grains per m 2 and grain yield.The results revealed that yield, total number of grains m -2 , number of grains per cob, 1000 grains weight, number of grain rows per cob, cob girth, and cob length were maximized (P < 0.001) at the N4 level without having an interaction with the H of maize crop.It was concluded that the selection of best H for each location at 325 kg N ha -1 can be used to enhance the efficiency of maize yield in autumn season at both locations under irrigated conditions.
Language: English
Subfield: Agronomy and Crop Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: gold
Estimated APC paid: $500
OpenAlex ID: W4200349050