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Application of the end-of-season stalk nitrate test for a high-yield maize production system in Northwestern China

文献类型： 外文期刊

作者： Yang, Zhi-ping 1 ; Wang, Yong-liang 1 ; Guo, Cai-xia 1 ; Guo, Jun-ling 1 ; Shuai, Xiu-fu 3 ; Yost, Russell 3 ; Zhang, 1 ;

作者机构： 1.Shanxi Acad Agr Sci, Inst Agr Environm & Resources, Taiyuan 030031, Shanxi, Peoples R China

2.Key Lab Soil Environm & Nutrient Resources Shanxi, Taiyuan, Shanxi, Peoples R China

3.Univ Hawaii, Dept Trop Plant & Soil Sci, Manoa, HI USA

4.Virginia Polytech Inst

关键词： critical nitrate concentration;grain yield;N translocation efficiency;stalk nitrate test

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： 2017 年 40 卷 17 期

页码：

收录情况： SCI

摘要： Excessive nitrogen application has caused serious environmental pollution under high-yield maize system in China. Our objective was to evaluate critical stalk nitrate (NO3-) levels that support high yield (>13Mgha(-1)), but are not in excess. Optimal stalk NO3- concentration was determined by conducting seven nitrogen levels experiments in two high yield maize regions: Dongyang County (DY) and Wenshui County (WS). Optimal stalk NO3- concentration category range to obtain maximum yield in DY (sandy loam, higher accumulated temperature and solar radiation compared with WS) was 0.44-1.19, which similar to the criteria of US (0.70-2.0g kg(-1)). While for WS (loam soil, lower accumulated temperature and solar radiation compared with DY), optimal stalk NO3- concentration category range to obtain maximum yield was 1.95-4.15, greatly higher than the US criteria. These results suggested thatit is necessary to establish matching optimal stalk NO3- category ranges for different ecological regions in China.

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