Research and Development of a DNDC Online Model for Farmland Carbon Sequestration and GHG Emissions Mitigation in China

文献类型： 外文期刊

第一作者： Jiang, Zaidi

作者： Jiang, Zaidi;Yin, Shan;Zhang, Xianxian;Li, Changsheng;Shen, Guangrong;Zhou, Pei;Liu, Chunjiang;Jiang, Zaidi;Yin, Shan;Zhang, Xianxian;Li, Changsheng;Shen, Guangrong;Zhou, Pei;Liu, Chunjiang;Jiang, Zaidi;Yin, Shan;Shen, Guangrong;Liu, Chunjiang;Yin, Shan;Shen, Guangrong;Zhou, Pei;Liu, Chunjiang;Zhang, Xianxian

作者机构：

关键词： DNDC online model;agricultural managements;carbon sequestration;GHG emissions mitigation

期刊名称：INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH （ 影响因子：3.39； 五年影响因子：3.789 ）

ISSN： 1660-4601

年卷期： 2017 年 14 卷 12 期

页码：

收录情况： SCI

摘要： Appropriate agricultural practices for carbon sequestration and emission mitigation have a significant influence on global climate change. However, various agricultural practices on farmland carbon sequestration usually have a major impact on greenhouse gas (GHG) emissions. It is very important to accurately quantify the effect of agricultural practices. This study developed a platform-the Denitrification Decomposition (DNDC) online model-for simulating and evaluating the agricultural carbon sequestration and emission mitigation based on the scientific process of the DNDC model, which is widely used in the simulation of soil carbon and nitrogen dynamics. After testing the adaptability of the platform on two sampling fields, it turned out that the simulated values matched the measured values well for crop yields and GHG emissions. We used the platform to estimate the effect of three carbon sequestration practices in a sampling field: nitrogen fertilization reduction, straw residue and midseason drainage. The results indicated the following: (1) moderate decrement of the nitrogen fertilization in the sampling field was able to decrease the N2O emission while maintaining the paddy rice yield; (2) ground straw residue had almost no influence on paddy rice yield, but the CH4 emission and the surface SOC concentration increased along with the quantity of the straw residue; (3) compared to continuous flooding, midseason drainage would not decrease the paddy rice yield and could lead to a drop in CH4 emission. Thus, this study established the DNDC online model, which is able to serve as a reference and support for the study and evaluation of the effects of agricultural practices on agricultural carbon sequestration and GHG emissions mitigation in China.

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