亚热带喀斯特石漠化土地退化特征研究  

CHARACTERISTICS OF KARST ROCKY DESERTIFICATION LAND IN THE SUBTROPICAL ZONE IN CHINA

作　　者：李阳兵[1] 姜丽[1] 白晓永[1] 

机构地区：[1]贵州师范大学地理与生物科学学院,贵州贵阳550001

出　　处：《长江流域资源与环境》2006年第3期395-399,共5页Resources and Environment in the Yangtze Basin

基　　金：国家自然科学基金(40361004)

摘　　要：喀斯特石漠化退化土地是目前西部地区经济发展、生态恢复与重建工作最为严重的问题之一。喀斯特石漠化是一种严重的土地退化,石漠化土地退化过程中存在社会经济反馈、动力反馈和生物原反馈等多层次反馈结构。由于喀斯特生态系统的独特性和脆弱性,喀斯特石漠化土地具有不同于其它生态脆弱区土地退化的特征,因而将其归纳为土地退化恢复过程的基岩差异性、退化恢复过程与土地利用方式的相关性、退化土地成因的地域差异性、石漠化土地的空间异质性与尺度相关性、恢复过程的土壤—地形决定性、土壤资源的不可再生性,石漠化土地退化的本质是喀斯特生态系统服务功能的下降和丧失,是一种功能性荒漠化。对石漠化土地的特征进行全面深入的探讨,有助于石漠化土地分类治理和生态恢复重建。The degradation land of karst rocky desertification is one of the most serious problems on economic development, eco-system restoration and reconstruction in Southwest China. Karst rocky desertification is a kind of serious land degradation, including social-economical feedback, dynamical feedback and original biology feedback in its degrading processes. Because of the unique eco-system characters and fragilities of karst eco-system, karst rocky desertification land has different land degradation characteristics differentiated from other fragile eco-region as follows： （1） the lithology types difference during the processes of land degradation and restoration; （2） the relativity among land use patterns and land degradation and restoration processes; （3） regional differences and artificial driving mechanism of formation and distribution; （4） the landscape spatial heterogeneity and scale of rocky desertification land; （5） the restoration depend upon soil and topography;（6） the non-renewable ability of soil resources. Karst land rocky desertification is a kind of functional desertification, and its genesis is the fall and decline of eco-system services. So, it is beneficial to probe into the characteristics of karst rocky desertification land for the taming as classifieations and ecological restoration and reconstruction of land rocky desertification.

关 键 词：喀斯特 石漠化土地 特征 

分 类 号：S151.1[农业科学—土壤学] P931.5[农业科学—农业基础科学]