华东地区农田土壤有机碳时空格局动态模拟研究  

Modeling Farmland Soil Organic Carbon Dynamics in Eastern China:Spatio-Temporal Pattern

作　　者：于永强[1] 黄耀[1] 张稳[1] 孙文娟[1] 

机构地区：[1]中国科学院大气物理研究所边界层物理和大气化学国家重点实验室

出　　处：《地理与地理信息科学》2007年第1期97-100,共4页Geography and Geo-Information Science

基　　金：中国科学院知识创新工程重大资助项目(KZCX1-SW-01-13)

摘　　要：基于已建成的农田土壤有机碳模型与GIS空间数据库的耦合，对华东6省（市）1980-2000年农田土壤有机碳时空变化进行模拟。结果表明：20年来该区土壤有机碳总体呈增加趋势，其中增加、持平和减少的面积分别占89．3％、9．5％和1．2％。1980-1985年土壤有机碳增加迅速，1985—1991年增加速率最快，其后趋缓。20年来农田土壤有机碳储量累计增加166Tg，范围为140～193Tg。其中安徽和江苏SOC储量增加量约占总增量的59．3％，上海、福建、江西和浙江占40．7％。Eastern China is the most developed region and main area of food production. An evaluation on the changes of soil organic carbon （SOC） in this region is of great importance to insure national food security and to make regional sustainable development. By linking a soil organic carbon model developed by the authors to GIS database, the changes of SOC in eastern China was simulated from 1980 to 2000. Model estimates indicated that SOC increased in general over the 20 years. The acreage of SOC increase, balance and decrease acoounts for 89.3%, 9.5% and 1.2% of the total arable area, respectively. Rapid increase occurred from 1980 to 1985 and higher increase rates appeared during 1985 and 1991. The annual increase rate decreased after 1991. An overall increase was estimated to be 166 Tg,ranging from 140 Tg to 193 Tg over the 20 years. The quantity of SOC increased in the provinces of Anhui and Jiangsu acoounts for 59.3% of the total,and that in the provinces of Fujian,Jiangxi and Zhejiang and Shanghai City accounts for 40.7%.

关 键 词：土壤有机碳 空间格局 华东 模拟 碳循环 

分 类 号：S153.62[农业科学—土壤学]