耗散结构理论在我国北方农牧交错带人地系统分析中的应用  

Applying Dissipative Structure Theory to Analyze Man-land System in Transitional Zone of Pastures and Farmlands in North China

作　　者：宋豫秦[1] 张力小[1] 曹淑艳[1] 

机构地区：[1]北京大学环境科学中心,北京100871

出　　处：《中国沙漠》2000年第S1期16-22,共7页Journal of Desert Research

基　　金：国家"973"项目! ( G19990 43 4 0 0 );国家"九五"攻关项目! ( 96-92 0 -13 -0 2 );院特别支持项目! ( KZ95 T-0 4;KZ95 1-A1-3 0

摘　　要：在分析了耗散结构形成的条件基础上 ,首先对我国北方农牧交错带人地系统进行了状态识别 ,指出 :北方农牧交错带的大部分人地系统处于低序的耗散结构状态 ,有些地区的人地系统已退化到近平衡态线性区 ;沙漠化的成因是系统封闭和自组织混乱 ;点状治理有其自身的局限性 ;沙漠化的逆转也应遵循系统演化的分支理论。最后 ,指出我国北方农牧交错带的人地系统具有脆弱性。Based on the analysis condition of dissipative structure, the state of man land system of inter locked zone of pastures and farmlands of north China has been identified. The conclusions are that most of the human land systems are in low order structure, some even have been degenerated to the range of linearity. From the point of the dissipative structure theory, the causes of desertification are insulation of the system and chaos of self organization. And the spot recondition has its own limitation, the recovery of the land follows the principle of embranchment evolvement. Finally, the characteristics of dissipative structure of human land system have been analyzed, which are fragile, low dissipative, and functionary.

关 键 词：耗散结构理论 农牧交错带 人地系统分析 荒漠化 

分 类 号：X24[环境科学与工程—环境科学]