基于DNDC模型的稻田生态系统碳动态模拟研究进展  

Progress on carbon dynamics simulation of paddy ecosystem based on DNDC model

作　　者：钱海燕 于婷婷 周杨明[2] 王娓 陈莎莎 QIAN Haiyan;YU Tingting;ZHOU Yangming;WANG Wei;CHEN Shasha(College of Earth Sciences,East China University of Technology,Nanchang 330013,China;College of Geographic and Environment,Jiangxi Normal University,Nanchang 330022,China;Jiangxi Engineering Consulting Center Co.LTD,Nanchang 330036,China)

机构地区：[1]东华理工大学地球科学学院,南昌330013 [2]江西师范大学地理与环境学院,南昌330022 [3]江西省工程咨询中心有限公司,南昌330036

出　　处：《华中农业大学学报》2022年第6期59-70,共12页Journal of Huazhong Agricultural University

基　　金：江西省自然科学基金面上项目(20212BAB203002);国家自然科学基金项目(41561105);东华理工大学博士科研启动基金项目(DHBK201909838);江西省重点研发计划一般项目(20181BBG70037)。

摘　　要：DNDC(denitrification-decomposition,反硝化-分解)模型是一个含有时间因子的模拟生物地球化学过程较为成熟的动态模拟模型,可用于模拟和评估作物(如水稻)生产、碳氮动态演变以及温室气体排放等。为了能够更充分地认识DNDC模型,使之得到更广泛应用,本文基于DNDC模型的构成与功能、目前6个(DNDC、CENTURY、CASA、EPIC、Biome-BGC、Roth C)世界著名的生物地球化学模型的比较及其DNDC模型在稻田生态系统中的模块优化,从稻田土壤碳动态角度出发,分析和总结了DNDC模型在稻田土壤固碳潜力、温室气体CO_(2)和CH4排放模拟、稻田管理模式评估以及模型参数敏感性分析方面的研究进展。本文也指出,受土壤属性空间异质性大、区域田间管理措施差异等因素影响,DNDC模型存在诸如点位尺度验证难以扩展到区位尺度模拟、模型矫正困难等限制模型准确性的问题。为使DNDC模型能够在中国复杂的农耕特征下开展模拟研究,今后的发展应重视DNDC模型模块功能优化、提高输入参数精确度等,进一步提高模型模拟精确度和预测评价系统的可信度,使模型更好地预测土壤碳动态变化,在稻田生态系统固碳减排和管理方案制定等方面发挥作用。The DNDC model is a relatively mature dynamic simulation model that simulates biogeochemical processes with time factors,and can be used to simulate and evaluate the production of crop(such as rice),the dynamic evolution of carbon and nitrogen,and greenhouse gas emissions in paddy ecosystem.In order to understand the DNDC model more fully and make it used more widely,this article analyzed and summarized the progress of DNDC model in paddy soil carbon sequestration potential,greenhouse gas CO_(2) and CH4 emission simulation,paddy management model evaluation and model parameter sensitivity analyses from the perspective of paddy soil carbon dynamics based on the composition and function of the DNDC model,the comparison of the six world-famous biogeochemical models,and the module optimization of the DNDC model in the paddy ecosystem.It also pointed out that the DNDC model affected by factors including large spatial heterogeneity of soil properties and differences in regional field management measures has problems including difficulty in extending point-scale verification to location-scale simulation and difficulty in model correction,which limit the accuracy of the model.In order to enable the DNDC model to carry out simulation under the complex characteristics of the agricultural development in China in the future,we should pay attention to optimize the function of the DNDC model module and improve the accuracy of input parameters to further improve the accuracy of model simulation and the reliability of the prediction and evaluation system,to provide methodological reference for studying the carbon dynamics of paddy ecosystem and making the model play a better role in the carbon sequestration,emission reduction of paddy field and the formulation of management scheme.

关 键 词：DNDC模型 稻田生态系统 土壤固碳 CH4和CO_(2)排放 管理模式评估 

分 类 号：S158.2[农业科学—土壤学] X511[农业科学—农业基础科学]