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

第一作者： Duan, Yinghua

作者： Duan, Yinghua;Xu, Minggang;Liu, Hongbin;Wang, Bairen;Gao, Suduan;Yang, Xueyun;Huang, Shaomin

作者机构：

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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