喀斯特贫困山地的生态重建：区域范型

针对喀斯特山区的贫困与环境退化的现状，提出了喀斯特山区以协调人地关系、实现区域人类生态系统持续发展为目标的生态重建战略，其核心是整体人地系统的生态优化。基于所提出的生态重建战略构想，本文以贫困和环境退化均很典型的贵州织金县为区域案例，通过现状调查与分析，针对土地退化为主要形式的环境退化，确定以土地利用和产业结构的优化配置为该地区生态重建的主要内容。并且采用目标规划模型，针对不同的工农业产出要求，对土地配置和产业结构进行了相应调整，为该地区不同发展阶段生态重建战略的实施提供了依据。

ECOLOGICAL REHABILITATION OF POOR KARST MOUNTAIN AREA:REGIONAL MODEL

Concerning problems of the poverty and environmental degradation in Karst mountain areas,this paper puts forward strategies on ecological rehabilitation with the aim of coordinating man land relationship and realizing sustainable development of regional ecological human system.The core is to seek ecological optimization of the whole regional man land system.Based on the framework of ecological rehabilitation,Zhijin,one of the counties typical both in poverty and environmental degradation in Karst mountain areas of Guizhou Province of China was chosen for case study.According to investigations and analysis of the county's environmental degradation,especially land degradation,the study identifies the optimization of industrial and land use structures as the main content of ecological rehabilitation.Using the model of goal programming,this paper rejusts the industrial and land use structures of Zhijin County under different demands of industrial and agricultural output which increased by 10%,20%,50%,and 100% more than that of current respectively,and got to the maximum.The conclusion showed that when the current agricultural productivity and the demand of economic development were satisfied,it was feasible to limit the expansion of farmland and keep the demand of moderate food yield which is 300 kg per capita in Karst mountain counties such as Zhijin.The object of this study is to provide basis for the implementation of ecological rehabilitation in the study area in different phases of development.