Nutrient Expert Improves Nitrogen Efficiency and Environmental Benefi ts for Summer Maize in China
文献类型： 外文期刊
作者：
Zhang, J. J.
1
;
He, P.
1
;
Xu, X. P.
3
;
Wang, Y. L.
4
;
Jia, L. L.
5
;
Cui, R. Z.
6
;
Wang, H. T.
7
;
Zhao, S. C.
1
;
Ulla
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 100081, Peoples R China
3.Beijing Acad Agr & Forestry Sci, Inst Plant Nutr & Resources, Beijing Engn Technol Res Ctr Slow Controlled Rele, Beijing 100097, Peoples R China
4.Henan Agr Univ, Coll Resources & Environm, Zhengzhou 450002, Peoples R China
5.Hebei Acad Agr & Forestry Sci, Inst Agr Resources & Environm, Shijiazhuang 050051, Peoples R China
6.Shandong Acad Agr Sci, Inst Agr Resources & Environm, Jinan 250100, Peoples R China
7.Shanxi Acad
期刊名称：AGRONOMY JOURNAL （ 影响因子：2.24； 五年影响因子：2.829 ）
ISSN： 0002-1962
年卷期： 2017 年 109 卷 3 期
页码：
收录情况： SCI
摘要： Modern agriculture needs environmentally friendly approaches to increase production, improve nitrogen use efficiency (NUE), and promote ecologically sustainable agriculture. This study was conducted from 2010 to 2014 in 389 farmers' fields across major summer maize growing regions in north-central China to evaluate the continual performance of the nutrient expert (NE) system for improving NUE and environmental benefits. Results indicated that NE significantly increased grain yield and profitability by reducing N fertilizer rate by 35.1% (84.6 kg N ha(-1)), increasing the K rate by 68.1% (25.8 kg K2O ha(-1)), and keeping the P rate the same as the farmers' practice (FP). On average, NUE achieved in the NE treatment was significantly higher than for FP and fertilizer recommendation based on soil testing (OPTS). The NE increased agronomic efficiency of nitrogen (AEN) by 50.8 and 17.3%, recovery efficiency of nitrogen (REN) by 67.7 and 15.9%, and partial factor productivity of nitrogen (PFPN) by 43.8 and 21.2% compared with FP and OPTS, respectively. Furthermore, the calculated total N2O emission, total greenhouse gas (GHG) emission, and GHG emission intensity were 35.1 and 17.5%, 35.2 and 18.4%, and 37.3 and 17.4% lower in the NE treatment when compared with FP and OPTS, respectively. The differences in yield, economic benefits, NUE, and GHG emission among NE, FP, and OPTS treatments confirmed that NE is a promising nutrient decision support tool and has the potential to improve NUE and environmental benefits for summer maize (Zea mays L.) in north-central China.
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