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Significant residual effects of wheat fertilization on greenhouse gas emissions in succeeding soybean growing season

文献类型： 外文期刊

作者： Zhang, Xin 1 ; Zhang, Jun 1 ; Zheng, Chengyan 1 ; Guan, Dahai 2 ; Li, Shengming 3 ; Xie, Fangjing 3 ; Chen, Jingfen 4 ; H 1 ;

作者机构： 1.Chinese Acad Agr Sci, Minist Agr, Inst Crop Sci, Key Lab Crop Physiol & Ecol, Beijing 100081, Peoples R China

2.Rural Energy & Environm Agcy, Minist Agr, Beijing 100125, Peoples R China

3.Inst Agr Sci Xiao Cty, Xiao County, Peoples R China

4.Soil & Fertilizer Stn Xiao Cty, Xiao County 235200, Peoples R China

5.Chongqing Acad Agr Sci, Chongqing 401329, Peoples R China

6.Nanjing Agr Univ, Inst Appl Ecol, Nanjing 210095,

关键词： Fertilization Climate change;Residual effects;Soybean-wheat system;Greenhouse gas

期刊名称：SOIL & TILLAGE RESEARCH （ 影响因子：5.374； 五年影响因子：6.368 ）

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收录情况： SCI

摘要： Many efforts have been made to learn the fertilization effects on greenhouse gas (GHG) emissions in the current crop season of multiple cropping systems, however, residual effects on the succeeding crop season are not clear. Based on a thirty-year fertilization experiment, we investigated the impacts of wheat fertilization on GHG emissions in the succeeding soybean season. There were five fertilization regimes for the wheat-soybean cropping system, including sole organic manure (M), balanced chemical NPK fertilizer (NPK), chemical NPK plus manure (NPKM), chemical NP plus wheat straw (NPS), and no fertilizer application (CK). Fertilization significantly affected GHG emissions not only in the current fertilizing season of winter wheat but also in the non-fertilizing season of summer soybean. Compared to the NPK treatment, the M and NPKM treatments stimulated annual soil CO2 and N2O emissions, and reduced CH4 emissions. The M and NPKM treatments also significantly increased soil organic C and total N contents, soil microbial biomass C and N, and NH4-N and NO3-N concentrations, especially in the soybean season. Although fertilizers were only applied in wheat season, the emissions of CO2 and N2O were higher in the soybean season. At the cropping system scale, the treatments of M and NPKM significantly increased annual global warming potential (GWP) by 75.5% and 38.3%, respectively, compared to the NPK. Sole manure application (M) significantly increased greenhouse gas intensity (GHGI) in comparison with the NPK, while there was no significant increment in the GHGI caused by the treatments of chemical fertilizer plus manure (NPKM) and crop straw (NPS). (C) 2017 Elsevier B.V. All rights reserved.

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