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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

作者： He, Ping 2 ; Sha, Zhimin 1 ; Yao, Dongwei 1 ; Xing, Suli 3 ; Zhou, Wei 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Minist Agr, Key Lab Crop Nutr & Fertilizat, Beijing 100081, Peoples R China

2.Int Plant Nutr Inst China Program, Beijing, Peoples R China

3.Hebei Acad Agr & Forestry Sci, Inst Agr Resources & Environm, Shijiazhuang, Peoples R China

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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