DNDC模型在稻田生态系统中的研究进展及应用  

Advance and application of DNDC model in paddy ecosystem

作　　者：张鲜鲜 周胜[1] 孙会峰[1] 张继宁[1] ZHANG Xian-xian;ZHOU Sheng;SUN Hui-feng;ZHANG Ji-ning(Institute of Eco-environmental Protection Research and Shanghai Engineering Research Center of Low-carbon Agricultural,Shanghai Academy of Agricultural Sciences,Shanghai 201403,China)

机构地区：[1]上海市农业科学院生态环境保护研究所/上海低碳农业工程技术研究中心,上海201403

出　　处：《上海农业学报》2019年第1期109-117,共9页Acta Agriculturae Shanghai

基　　金：上海市科技兴农项目(G2016060301;T20130101和20170122);国家科技支撑项目(2013BAD11B02)

摘　　要：DNDC模型(De Nitrification-DeComposition model,反硝化-分解模型)是以模拟陆地生态系统中碳氮循环为目的,耦合生态环境驱动因子及其相应的生物地球化学过程的模型,在稻田生态系统中有较好的应用。以稻田生态系统中DNDC模型应用为研究对象,通过调研与查阅文献,针对模型中稻田作物参数、温室气体排放以及氮素流失等模块的优化改进情况进行了总结和分析。目前,模型虽然已经能较好地模拟稻田生态系统中作物生长、甲烷排放以及氮素流失等,但仍然存在着诸如水稻类型匮乏、管理措施输入参数较少、氧化亚氮再现性较弱等问题。在今后发展中,模型应丰富水稻类型、改进农田管理相应参数及优化氧化亚氮的模拟机理,为在稻田减排降污方向推广模型应用、建立可靠的评估方法提供理论支撑。DNDC model(DeNitrification-DeComposition model)is a process-oriented model that predicts carbon and nitrogen dynamics via coupling of biogeochemistry processes to ecologic environmental factors,which also has a well prediction of greenhouse gas emissions from rice paddy.Advance and application of DNDC model in paddy ecosystem were reviewed,including crop growth,greenhouse gases emissions and nitrogen loss from paddy field.The results showed that modeled results of crop growth,methane emissions,and nitrogen loss fitted observed values well after years of improvement.However,DNDC model still has its disadvantages in rice varieties,management techniques,and nitrous oxide reproducibility.These findings have implication for model improvement on the variety of rice type,input data of agricultural management,and the mechanism of nitrous oxide emissions to provide theoretical support in greenhouse gases emissions mitigation and establish a reliable evaluation method on paddy ecosystem.

关 键 词：DNDC模型 稻田生态系统 温室气体排放 氮素流失 

分 类 号：S511[农业科学—作物学] X171.1[环境科学与工程—环境科学]