您好，欢迎访问山西省农业科学院 机构知识库！
山西省农业科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

On-Farm Evaluation of Winter Wheat Yield Response to Residual Soil Nitrate-N in North China Plain

文献类型： 外文期刊

作者： Cui, Zhenling 1 ; Chen, Xinping 1 ; Miao, Yuxin 1 ; Li, Fei 1 ; Zhang, Fusuo 1 ; Li, Junliang 2 ; Ye, Youliang 3 ; Yang, 1 ;

作者机构： 1.China Agr Univ, Coll Resources & Environm Sci, Dep Plant Nutr, Beijing 100094, Peoples R China

2.Qingdao Agr Univ, Dept Agron, Qingdao 266023, Peoples R China

3.Henan Agr Univ, Coll Resources & Environm Sci, Zhengzhou 450000, Peoples R China

4.Shanxi Acad Agr Sci, Inst Soil Sci & Fertilizer, Taiyuan 030031, Peoples R China

5.Shandong Agr Univ, Coll Resources & Environm Sci, Tai An 271018, Shandong, Peoples R China

期刊名称：AGRONOMY JOURNAL （ 影响因子：2.24； 五年影响因子：2.829 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： High soil nitrate-N accumulation has been observed in North China Plain (NCP), but it was seldom considered as a N source in N management due to the lack of data on crop response to soil nitrate-N accumulation. A total of 124 on-farm N-response experiments were conducted from 2003 to 2006 in seven key winter wheat (Triticum aestivum L.) production regions of NCP to evaluate wheat yield response to residual soil nitrate-N. High soil nitrate-N accumulation ( 172 kg N ha-1 in 90 cm soil depth) was observed during wheat growing season. Compared with 165 nitrate-N ha-1 in 0 to 90 soil layer before sowing, added fertilizer N did not increase wheat yield under 262 kg nitrate-N ha-1 condition, but increased residual nitrate-N and N losses and reduced recovery N efficiency (P < 0.05). Wheat yield response to residual soil nitrate-N could be fitted by a linear plus plateau model, and calculated minimum soil nitrate-N content for maximum grain yield was 211 kg N ha-1 (R2 = 0.31) before sowing across all 223 zero-N plots in 124 sites. When two growth periods (before and after shooting stage) were analyzed separately, the coefficient of determination between yield and soil nitrate-N increased significantly. We conclude that winter wheat yield response to added N fertilizer was unlikely if soil nitrate-N content exceeded 72 (0-30 cm soil depth) and 175 kg N ha-1 (0-90 cm soil depth) before sowing and shooting stage, respectively. According to these thresholds, 55% and 37% of farmer's fields did not need to apply N fertilizer before sowing and at shooting stage, respectively.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：山西省农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台