Tillage effects on carbon footprint and ecosystem services of climate regulation in a winter wheat-summer maize cropping system of the North China Plain

文献类型： 外文期刊

第一作者： Zhang, Xiang-Qian

作者： Zhang, Xiang-Qian;Pu, Chao;Zhao, Xin;Xue, Jian-Fu;Zhang, Ran;Chen, Fu;Zhang, Hai-Lin;Zhang, Xiang-Qian;Nie, Zi-Jin;Lal, Rattan

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关键词： Tillage practices;Carbon footprint;Ecosystem services;Winter wheat-summer maize cropping system;North China Plain

期刊名称：ECOLOGICAL INDICATORS （ 影响因子：4.958； 五年影响因子：5.846 ）

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收录情况： SCI

摘要： Inappropriate farm practices can increase greenhouse gases (GHGs) emissions and reduce soil organic carbon (SOC) sequestration, thereby increasing carbon footprints (CFs), jeopardizing ecosystem services, and affecting climate change. Therefore, the objectives of this study were to assess the effects of different tillage systems on CFs, GHGs emissions, and ecosystem service (ES) values of climate regulation and to identify climate-resilient tillage practices for a winter wheat (Triticum aestivum L.)-summer maize (Zea mays L) cropping system in the North China Plain (NCP). The experiment was established in 2008 involving no-till with residue retention (NT), rotary tillage with residue incorporation (RT), sub-soiling with residue incorporation (ST), and plow tillage with residue incorporation (PT). The results showed that GHGs emissions from agricultural inputs were 6432.3-6527.3 kg CO2-eq ha(-1) yr(-1) during the entire growing season, respectively. The GHGs emission from chemical fertilizers and irrigation accounted for >80% of that from agricultural inputs during the entire growing season. The GHGs emission from agricultural inputs were >2.3 times larger in winter wheat than that in the summer maize season. The CFs at yield-scale during the entire growing season were 0.431, 0.425, 0.427, and 0.427 without and 0.286, 0364,0360, and 0334 kg CO2-eq kg(-1) yr(-1) with SOC sequestration under NT, RT, ST, and PT, respectively. Regardless of SOC sequestration, the CFs of winter wheat was larger than that of summer maize. Agricultural inputs and SOC change contributed mainly to the component of CFs of winter wheat and summer maize. The ES value of climate regulation under NT was sic159.2, 515.6, and 478.1 ha(-1) yr-(1) higher than that under RT, ST, and PT during the entire growing season. Therefore, NT could be a preferred "Climate-resilient" technology for lowering CFs and enhancing ecosystem services of climate regulation for the winter wheat -summer maize system in the NCP. (C) 2016 Elsevier Ltd. All rights reserved.

分类号： Q1

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