Integrated assessment of the impact of enhanced-efficiency nitrogen fertilizer on N2O emission and crop yield

文献类型： 外文期刊

第一作者： Feng, Jinfei

作者： Feng, Jinfei;Li, Fengbo;Fang, Fuping;Feng, Jinfei;Deng, Aixing;Feng, Xiaomin;Zhang, Weijian

作者机构：

关键词： Food security;Global warming;Enhanced efficiency N fertilizer;Greenhouse gas;Meta-analysis

期刊名称：AGRICULTURE ECOSYSTEMS & ENVIRONMENT （ 影响因子：5.567； 五年影响因子：6.064 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Enhanced-efficiency nitrogen fertilizer (EENF) has gained considerable attention for improving nitrogen use efficiency and mitigating N2O emission in many agro-ecosystems. However, the effectiveness of EENF is highly variable under field condition. The factors influencing the efficacy of EENF are not well understood. Here, a meta-analysis was conducted to investigate the key factors affecting the efficacy of EENF in upland cropping systems. The effects of EENF were found to be similar among maize, wheat, and barley, while they varied among different EENF products. Inhibitors (IS), including nitrification inhibitors (NI), urease inhibitors (UI), and the combination of UI and NI, significantly mitigated N2O emission and increased crop yield, resulting in a greater reduction in yield-scaled N2O emission compared with slow- or control-releasing fertilizer (S/CRF). Reductions in yield-scaled N2O emission response to IS and S/CRF were both greater in arid regions than in humid regions. Soil pH and texture had less impact on the effect of IS than S/CRF. The efficacy of IS and S/CRF were not significant when N use rates were between 120 and 180 kg N ha(-1). Surface broadcasting were unfavorable for mitigating N2O emissions with both IS and S/CRF. The impact of tillage on the efficacy of IS and S/CRF was affected by climate. The effectiveness of S/CRF depended more on these factors than did IS. This meta-analysis highlighted the necessity to connect EENF products with specific climatic, soil, and agronomic attributes for predicting their effectiveness. (C) 2016 Elsevier B.V. All rights reserved.

分类号： S

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