西南岩溶区土壤生态系统退化研究  

The Study of Soil Ecosystem Degradation in SouthWestern Karst Region

作　　者：王巨[1] 谢世友[1,2] 戴国富[1] 

机构地区：[1]西南大学地理科学学院,重庆400715 [2]西南大学三峡库区生态环境教育部重点实验室,重庆400715

出　　处：《中国农学通报》2011年第32期181-185,共5页Chinese Agricultural Science Bulletin

基　　金：国家科技支撑计划(2006BAC01A16);重庆市自然科学基金重点项目(CSTC2009BA0002);重庆市重点实验室开放基金"三峡库区森林生态保护与恢复"

摘　　要：受喀斯特特殊地质历史背景的影响,中国西南岩溶区土壤生态系统存在土壤垂直分异强烈、空间分异强烈、土壤不可再生性的结构特征和营养元素循环不畅、植被生长受限的功能特征。笔者在分析西南岩溶土壤生态系统结构和功能脆弱性的基础上,从系统物质能量循环的角度来探讨西南岩溶区土壤生态系统在土壤侵蚀过程中土壤结构、养分、水分、微生物退化过程和机理。Deeply influenced by karst geological environment,the structure of the soil ecological system in the southwest karst area of China is characterized by vertical-space differentiation strongly,irrefragable and its function is characterized by poorly nutrient elements cycling,flawed vegetation growing.Based on the analysis of the soil ecosystem system ＇ s structure and function vulnerability,the degradation processes and mechanisms of the soil ecological system in the southwest karst area had been analyzed and were discussed from structure,nutrient,moisture and microbial points of view in this paper from the angle of the material-energy cycle.

关 键 词：土壤生态系统 物质循环失衡 西南岩溶区 

分 类 号：S1[农业科学—农业基础科学]