文献类型： 外文期刊
作者： Kong, Dejie 1 ; Liu, Nana 4 ; Ren, Chengjie 1 ; Li, Huiying 3 ; Wang, Weiyu 1 ; Li, Na 1 ; Ren, Guangxin 1 ; Feng, Yongzh 1 ;
作者机构： 1.Northwest A&F Univ, Coll Agron, Yangling 712100, Shaanxi, Peoples R China
2.NingXia Acad Agr & Forestry Sci, Agr Biotechnol Ctr, Yinchuan 750002, Ningxia, Peoples R China
3.Res Ctr Recycling Agr Engn Technol Shaanxi Prov, Yangling 712100, Shaanxi, Peoples R China
4.Ningxia Agr Inst Survey Design, Yinchuan 750002, Ningxia, Peoples R China
5.Forest & Desert Control Res Inst Alxa League, Alxa League 750306, Peoples R China
关键词： soil CO(2)emission; crop rotation; nitrogen; soil organic carbon
期刊名称：SUSTAINABILITY （ 影响因子：3.251； 五年影响因子：3.473 ）
ISSN：
年卷期： 2020 年 12 卷 13 期
页码：
收录情况： SCI
摘要： Developing environmentally friendly and sustainable nitrogen (N) fertilizer management strategies is crucial in mitigating carbon dioxide (CO2) emission from soil. How N fertilizer management practices influence soil CO(2)emission rates under different crop rotations remains unclear. The aim of this study was to assess the impact on soil CO(2)emission and soil physicochemical properties of three N fertilizer treatments including traditional rate (TF), optimized rate (0.8TF), and no fertilizer (NF) under three different crop rotation treatments: wheat-fallow (WF), wheat-soybean (WS), and wheat-maize (WM) over two years in a field experiment in northwest China. The rates were 5.51, 5.60, and 5.97 mu mol center dot m(-2)center dot s(-1)of mean soil CO(2)emission under the TF, 0.8TF, and NF treatments, respectively. Mean soil CO(2)emission rates were 21.33 and 26.99% higher under the WM rotation compared with the WF and WS rotations, respectively. The WS rotation showed higher soil nutrient content and lower soil CO(2)emissions, and reduced fertilizer application. Importantly, soil organic carbon (SOC) concentration in the topsoil can be maximized by including either a summer legume or a summer maize crop in winter wheat rotations, and by applying N fertilizer at the optimal rate. This may be particularly beneficial in the dryland cropping systems of northern China.
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