On-farm evaluation of an in-season nitrogen management strategy based on soil Nmin test

被引：224

作者：

Cui, Zhenling ^{[1
]}

Zhang, Fusuo ^{[1
]}

Chen, Xinping ^{[1
]}

Miao, Yuxin ^{[1
]}

Li, Junliang ^{[2
]}

Shi, Liwei ^{[2
]}

Xu, Jiufei ^{[2
]}

Ye, Youliang ^{[3
]}

Liu, Chunsheng ^{[4
]}

Yang, Zhiping ^{[5
]}

Zhang, Qiang ^{[5
]}

Huang, Shaomin ^{[6
]}

Bao, Dejun

机构：

[1] China Agr Univ, Coll Resources Environm Sci, Dept Plant Nutr, Beijing 100094, Peoples R China

[2] Coll Agron Laiyang, Dept Agron, Laiyang 265200, Peoples R China

[3] Henan Agr Univ, Coll Resource & Environm Sci, Zhengzhou 450000, Peoples R China

[4] Shandong Agr Univ, Coll Resource & Environm Sci, Tainan 271018, Taiwan

[5] Shanxi Agr Univ, Inst Soil Sci & Fertilizer, Taiyuan 030031, Peoples R China

[6] Henan Acad Agr Sci, Inst Soil Sci & Fertilizer, Zhengzhou 450000, Peoples R China

来源：

FIELD CROPS RESEARCH | 2008年 / 105卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

soil N-min test; N losses; in-season N management; N use efficiency; N balance;

D O I：

10.1016/j.fcr.2007.07.008

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 [作物学];

摘要：

Successful nitrogen (N) management requires better synchronization between crop N demand and N supply from all sources throughout crop growing season. An in-season N management strategy based on soil N,; test had been developed under experimental conditions, and more than half-N fertilizer could be saved without grain yield losses, compared with farmer's N management practices. The objective of this study was to evaluate this in-season N management strategy for winter wheat (Triticum aestivum L.) in different farmers' fields of North China Plain (NCP). A total of 121 on-farm N-response experiments (check with no N fertilizer, in-season N management based on soil N-min test, and farmer's practice) were conducted in seven key winter wheat production regions of NCP from 2003 to 2005. The average N rate determined with in-season N management strategy (128 kg N ha(-1)) was significantly lower than farmer's practice (325 kg N ha(-1)) without wheat grain yield losses. As a result, in-season N management strategy significantly increased economic gains by $144 ha(-1), reduced residual nitrate-N content in the top 90 cm soil layer and N losses by 81 and 118 kg N ha(-1), respectively (P < 0.05). Recovery N efficiency (REN), agronomic N use efficiency (AEN) and N partial factor productivity (PFPN) were significantly improved to 44%, 11 and 56 kg kg(-1), respectively, compared with farmer's N practice (REN, 18%; AEN, 3 kg kg(-1); PFPN, 20 kg kg(-1)). Effective use of soil N supply and better synchronization between crop N demand and supply were main reasons for the increased N use efficiency. We conclude that the in-season N management strategy based on soil N-min test can be applied for winter wheat production in NCP for improved N use efficiency and reduced environmental contamination. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：48 / 55

页数：8

共 42 条

[1]

Using the presidedress soil nitrate test and organic nitrogen crediting to improve corn nitrogen recommendations [J].