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- Title
Evaluation of In-Season Nitrogen Management for Summer Maize in North Central China.
- Authors
Zhao, S.-C.; P. He; Sha, Z.-M.; Xing, S.-L.; Li, K.-J.
- Abstract
We conducted field experiments in which nitrogen (N) was applied to summer maize at different rates and different basal/topdressing ratios. The experiments were carried out in 2009 in Hengshui and Xinji, Hebei province, China. The results showed that basal application of N was necessary for maize growth in early summer and for high grain yields. For the Hengshui and Xinji sites, 30 and 57 kg Nha-1, respectively, would meet the N demands of maize before 7-leaf stage. The total rates of 120 and 180 kg Nha-1, respectively, would maximize grain yields, and in-season N management based on crop N demands and soil N supply could reduce N inputs by more than 50% in Hengshui and 25% in Xinji, respectively, in one maize growth season, compared with farmers' practice, but the sustainability of the optimum N rates for maximum grain yield of next seasons crop needs to be further studied. Optimum N management should take into account the existing nutrient conditions at each site, soil fertility and texture, and crop demands.
- Subjects
CHINA; CORN growth; GRAIN yields; NITROGEN fertilizers; EXPERIMENTAL agriculture; SOIL fertility; SOIL texture
- Publication
ISRN Agronomy, 2012, p1
- ISSN
2090-7664
- Publication type
Article
- DOI
10.5402/2012/294514