EFFECT OF NITROGEN MANAGEMENT ON PRODUCTIVITY, NITROGEN USE EFFICIENCY AND NITROGEN BALANCE FOR A WHEAT-MAIZE SYSTEM
文献类型: 外文期刊
第一作者: Sha, Zhimin
作者: Sha, Zhimin;Yao, Dongwei;Zhou, Wei;He, Ping;Xing, Suli
作者机构:
关键词: N management;over fertilization;yield;nitrogen use efficiency;N balance
期刊名称:JOURNAL OF PLANT NUTRITION ( 影响因子:1.707; 五年影响因子:1.645 )
ISSN: 0190-4167
年卷期: 2013 年 36 卷 8 期
页码:
收录情况: SCI
摘要: Over-application of nitrogen (N) in North Central China is primary reasons for yield restriction and low nutrient use efficiencies. This study was to determine N management practices on grain yield, N efficiency, and N balance in China. Results from four season crops indicated that no significant yield differences across different N rates for the first season wheat were observed. Treatments with N rates lower than 75kg N ha(1) manifested yield reduction for the following seasons, and no much yield differences existed for the rest treatments. The accumulated N recovery efficiency (NREac) values ranged from 10.1% to 44.2% over the four seasons, and over N fertilization led to low NREac. The net N balance increased with N applied. Results from current study provided the proof that in the current rotation system the N150N150 treatment was the best economic treatment for achieving both higher yield and N use efficiency.
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