Long-term fertilization on nitrogen use efficiency and greenhouse gas emissions in a double maize cropping system in subtropical China
文献类型： 外文期刊
第一作者： Afreh, Daniel
作者： Afreh, Daniel;Zhang, Jun;Song, Zhenwei;Zheng, Chengyan;Deng, Aixing;Feng, Xiaomin;Zhang, Xin;Zhang, Weijian;Guan, Dahai;Liu, Kailou;Wu, Yan;Huang, Qianru
作者机构：
关键词： Soil fertility management; Nitrogen use efficiency; N2O emission; Global warming potential; Maize
期刊名称：SOIL & TILLAGE RESEARCH （ 影响因子：5.374； 五年影响因子：6.368 ）
ISSN： 0167-1987
年卷期： 2018 年 180 卷
页码：
收录情况： SCI
摘要： Fertilizer application often significantly affects soil quality and crop productivity, thus, can affect soil green-house gas (GHG) emissions and nitrogen use efficiency (NUE) as well. However, the impacts have not been well documented under double maize cropping system in subtropical China. Based on a thirty-year field experiment with five fertilization treatments (i.e. no fertilizer (CK), organic manure (OM), N, NPK and NPK plus OM (NPKM)), maize cultivar (Yedan 13) was planted both at the early maize season and late maize season, we assessed the impacts of different fertilizer application on nitrous oxide (N2O) and methane (CH4) emissions, grain yield and NUE. Compared to the NPK, manure application (i.e. OM and NPKM) significantly increased N2O emissions, and maize yield. Nevertheless, there was no significant difference in yield-scaled global warming potential (GWP) among NPK, OM, and NPKM. Manure application increased soil pH, soil organic carbon, and soil total N, suggesting it can improve soil quality. The NPKM treatment had the highest N uptake, but in terms of NUE, it was lower than OM, due to double N application. Our results suggest that manure application can compensate its negative impacts on N2O emission through improving soil quality, maize yield and N use efficiency.
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