摘要
分析了生物地球化学循环中植物—土壤生态系统的有机物动态,土壤有机质(SOM)主要库类——土壤C,N,P,S循环特点;阐述了土壤有机质的生物地球化学循环模型CENTURY结构。利用CENTURY模型模拟土地利用变化情形下内蒙古草原生态典型区土壤有机质动态。由数值模拟结果分析看,CENTURY对自然和人为活动影响下生态系统的土壤有机质动态有良好的模拟能力,同时又可有效地反映土地利用类型变化对生态环境和土壤侵蚀的影响。
The soil organic matter (SOM) dynamic in ecosystem was analyzed between plant and soil including soil C, N, P, S cycles in biogeochemical circulation. Then the CENTURY structure and themes were introduced and described. In the end, the CENTURY model was used to study the SOM dynamics in Inner Mongolia grassland of China. The results showed that the model can better monitor the SOM dynamic of grassland ecosystem and can validly reflect the ecoenvironment and soil erosion condition under landuse change owing to natural and human activities effect.
出处
《水土保持学报》
CSCD
北大核心
2003年第1期166-169,共4页
Journal of Soil and Water Conservation
基金
国家自然科学基金(39900084)
科技部"西北地区生态气候环境监测预测方法"项目
LAPC开放课题"土地生态系统变化对区域气候和生态环境的影响证据"(LPAC-KF-2002-10)的资助
