Research and Development of a DNDC Online Model for Farmland Carbon Sequestration and GHG Emissions Mitigation in China.
Research and Development of a DNDC Online Model for Farmland Carbon Sequestration and GHG Emissions Mitigation in China.
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中国农田碳汇和温室气体减排DNDC在线模型的研究与开发
DOI：
10.3390/ijerph14121493
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发表时间：
2017-12-01
影响因子：
--
通讯作者：
Liu C
中科院分区：
文献类型：
--
作者：
Jiang Z;Yin S;Zhang X;Li C;Shen G;Zhou P;Liu C
用于固碳和减缓排放的适当农业做法对全球气候变化具有重大影响。然而，农田碳固存的各种农业实践通常对温室气体（GHG）排放产生重大影响。准确地量化农业实践的影响是非常重要的。本研究基于反硝化分解（DNDC）模型的科学过程，开发了一个用于农业固碳与减排模拟与评价的平台——DNDC在线模型，该模型在土壤碳氮动态模拟中得到了广泛应用。通过对两个样地的适应性测试，结果表明模拟值与实测值吻合较好。我们利用该平台估算了样地三种固碳措施的效果：减施氮肥、秸秆秸秆和季中排水。结果表明：(1)样地适度减量施氮能够在保持水稻产量的同时减少N2O排放；(2)秸秆碎渣对水稻产量几乎没有影响，但CH4排放量和地表有机碳浓度随秸秆碎渣量的增加而增加；(3)与连续淹水相比，季中排水不会降低水稻产量，但会导致CH4排放量下降。因此，本研究建立了DNDC在线模型，可为研究和评价中国农业实践对农业固碳和温室气体减排的影响提供参考和支持。
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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影响因子：
3.9
作者：
Abdalla, M.;Kumar, S.;Williams, M.
通讯作者：
Williams, M.
影响因子：
5.2
作者：
Qiu, Jianjun;Li, Changsheng;Van Ranst, Eric
通讯作者：
Van Ranst, Eric
影响因子：
3.1
作者：
Babu, Y. Jagadeesh;Li, C.;Adhya, T. K.
通讯作者：
Adhya, T. K.
影响因子：
6.1
作者：
Smith, P;Smith, JU;Whitmore, AP
通讯作者：
Whitmore, AP
整合农艺实践，减少温室气体排放，同时提高水稻种植系统的经济回报
影响因子：
6.6
作者：
Xia, Longlong;Xia, Yongqiu;Yan, Xiaoyuan
通讯作者：
Yan, Xiaoyuan