Numerical analysis of the source-sink alternation of composite global warming potential of the paddy ecosystem in the Yangtze Delta

作     者：刘建栋 周秀骥 于强 

作者机构：Chinese Academy of Meteorological Sciences Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences 

出 版 物：《Science China Earth Sciences》 (中国科学（地球科学英文版）)

年 卷 期：2003年第46卷第4期

页      面：385-396页

核心收录：

学科分类：07[理学] 0713[理学-生态学] 

基　　金：This work was supported by the National Natural Science Foundation of China(Grant No.49899270) 

主　　题：paddy ecosystem, global warming potential, numerical simulation. 

摘      要：By coupling the biogeochemical model with plant ecological model, a model was established to reveal the principle of the composite global warming potential transformation in the paddy ecosystem. Validation of the model with the observed data indicated that the model can simulate both the crop growth processes and emissions of CH4 and N2O accurately. Some nu-merical analyses were made to identify the impacts of different fertilizer application on assimilation of CO2 and emissions of CH4 and N2O, and the transformation principle of the composite global warming potential. Based on the results of the numerical analysis, the source-sink alternation of composite global warming potential in the paddy ecosystem was discovered, and some new con-ceptions of fertilizer index such as maximum-sink fertilizer, zero-emission fertilizer are put forward in this paper. The fertilizer scheme for Yangtze Delta was proposed to provide the important scien-tific basis for a sustainable agriculture in this region.