基于DNDC模型冬小麦-夏玉米地土壤有机碳模拟  

Simulationon of Soil Organic Carbon in Winter Wheat-Summer Maize Lands Based on DNDC Model

作　　者：陈安国 陈韵茹 CHEN Anguo;CHEN Yunru(School of Economics,Hebei Geology University,Shijiazhuang 050031,China;Natural Resources Asset Capital Research Center,Hebei Geology University,Shijiazhuang 050031,China)

机构地区：[1]河北地质大学经济学院,石家庄050031 [2]河北地质大学自然资源资产资本研究中心,石家庄050031

出　　处：《长春大学学报》2024年第12期8-14,34,共8页Journal of Changchun University

基　　金：河北省教育厅项目(ZD202219)。

摘　　要：为研究冬小麦-夏玉米地土壤有机碳动态变化,利用河北栾城生态系统试验站2004-2008年3种施肥处理下土壤有机碳(SOC)实测数据对DNDC模型进行验证,模拟未来两种天气(SSP2-4.5和SSP5-8.5)、不同施肥处理下该地SOC至2100年的变化情况。结果显示,验证后的DNDC模型能较好模拟该地SOC变化情况;无论哪种未来天气下,不施肥和单施肥处理下SOC下降明显,施化肥加秸秆还田下SOC值增加。该地农民可改进施肥制度和秸秆还田比例以提高农田的碳汇潜力。In order to study the dynamic changes of soil organic carbon in winter wheat-summer maize lands,the DNDC model was validated by using measured soil organic carbon(SOC)data under three fertilization treatments from 2004 to 2008 at Luancheng Ecosystem Experiment Station in Hebei Province.The changes of SOC of the land were simulated until the year of 2100 under two future weather conditions(SSP2-4.5 and SSP5-8.5)and different fertilization treatments.The results show that the validated DNDC model can simulate the SOC changes of the land well;Regardless of the future weather conditions,SOC decreased significantly under no fertilization and single fertilization treatments,while SOC value increased under the application of chemical fertilizers and straw returning to the field.Farmers in the area can improve the fertilization system and the proportion of straw returning to the field to enhance the carbon sequestration potential of the farmland.

关 键 词：DNDC模型 土壤有机碳 碳汇潜力 

分 类 号：S153.6[农业科学—土壤学]