Assessment of the nitrogen requirements of maize (Zea mays L.) in Southern Guinea Savanna agroecology of Nigeria |
| |
Authors: | O. O. Agbede A. G. Ojanuga K. A. Ayotade A. Y. Adepoju |
| |
Affiliation: | (1) Department of Soil Science, University of Agriculture, P.M.B. 2373, Makurdi, Nigeria;(2) National Cereals Research Institute of Nigeria, P.M.B. 8, Bida, Nigeria |
| |
Abstract: | During the growing seasons (May to October) of 1987 and 1988 respectively five and four different rates of N were tested on maize (Zea mays L.) at 12 different field sites across the Southern Guinea Savanna of Nigeria. Nitrogen was applied through granular urea (size +14 mesh), ordinary prilled urea (–35 mesh) and calcium ammonium nitrate. Marked differences existed among experimental sites in maize grain yield response to N with Yelwa and Ta-Hoss in Plateau State having the highest response at 60 and 90 kg N ha–1 respectively.During 1988, at five experimental sites the yield was maximized with 120 kg N ha–1, while at three other sites the yield maximization occurred at 90 kg N ha–1. During 1987, the corresponding number of sites was two and six with 120 and 90 kg N ha–1 rates, respectively. Plant height and cob number exhibited a linear relationship with yield. Differences in yield in response to application of different N sources were non-significant.Contribution from the Nationally coordinated fertilizer use programme funded by Federal Government of Nigeria |
| |
Keywords: | N-rates N-sources N-requirements N-fertilizers |
本文献已被 SpringerLink 等数据库收录! |
|