Nitrogen use efficiency in a wheat-corn cropping system from 15 years of manure and fertilizer applications
文献类型: 外文期刊
作者: Duan, Yinghua 1 ; Xu, Minggang 1 ; Gao, Suduan 2 ; Yang, Xueyun 3 ; Huang, Shaomin 4 ; Liu, Hongbin 1 ; Wang, Bairen 1 ;
作者机构: 1.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Key Lab Crop Nutr & Fertilizat, Minist Agr China, Beijing 100081, Peoples R China
2.USDA ARS, San Joaquin Valley Agr Sci Ctr, Parlier, CA 93648 USA
3.Northwest Sci Tech Univ Agr & Forestry, Coll Resource & Environm, Yangling 712100, Shaanxi, Peoples R China
4.Henan Acad Agr Sci, Inst Plant Nutr & Agr Resources, Zhengzhou 450002, Henan, Peoples R China
关键词: Fertilizer contribution;Long-term fertilization;Phosphorus;Potassium;Stover return
期刊名称:FIELD CROPS RESEARCH ( 影响因子:5.224; 五年影响因子:6.19 )
ISSN: 0378-4290
年卷期: 2014 年 157 卷
页码:
收录情况: SCI
摘要: Low nitrogen use efficiency (NUE) and adverse environmental impacts caused by N fertilization increasingly threaten the sustainability of agriculture. To develop strategies for efficient nutrient management, we investigated the effects of long-term (1991-2005) various fertilization regimes on yield, NUE and N agronomic efficiency (NAE) in a wheat-corn cropping system at four sites (Changping, Zhengzhou, Yangling, and Qiyang) in China. Treatments included unfertilized control (CK), chemical fertilization only (N, NP, NK, and NPK), manure application (supplying 70% N) with NPK (NPKm) and at 1.5x rate (1.5NPKm), and NPK with corn stover returned (NPKs). The NP and NPK treatments resulted in generally higher yield, NUE and NAE than the N and NK for both wheat and corn demonstrating the importance of P in NUE improvement. The manure treatments resulted in significant increase or no decrease in the overall system NUE in all four sites with the highest mean NUE (49%) from NPKm treatment. In acid soil at Qiyang, only manure treatments resulted in significant increases of NUE and NAE indicating the importance of organic amendment. Wheat was more responsive to P fertilizer and corn was more responsive to manure in NUE improvement. Thus an effective nutrient management strategy is to ensure adequate P supply for the wheat crop and manure application for the corn crop to improve overall NUE for the wheat-corn production system. (C) 2013 Elsevier B.V. All rights reserved.
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