西南喀斯特区域农业生态系统评价研究——以广西河池地区为例

Evaluation of agro-ecosystems in Karst Areas—A case study of Hechi Region of Guangxi Province

本研究以农业生态环境、农业经济和社会3个子系统作为准则层,选取森林覆盖率、水土流失率等12个指标因子建立评价指标体系,对1995年和2003年广西河池地区的农业生态系统进行对比评价。结果表明:由于农业生态规划和管理的加强,河池地区农业生态系统由1995年的中等状态转变为2003年的良性状态,基本符合当地农业发展状况;但农业生产潜力尚未充分发掘,导致经济和社会子系统评价指数仍较低,从而影响到区域农业整体水平的提高;应在加强生态环境保护的基础上,发展并扩大农村种养产业链等促进河池地区农业经济的快速增长。

The evaluation of agro-ecosystems is valuable for assessing agricultural development, especially in fragile Karst Areas. Three sectors （ ecology, society and economy）, and 12 indices（forest cover, soil and water loss, etc） were selected for the evaluation of the agro-ecosystem of Hechi Region for the period of 1995 -- 2003. The results show an improvement from midium status to well status of the agro-ecosystem from 1995 to 2003. The increase is attributed to enhancement in planning and management of the agro-ecosystem, which is in accord with the local agricultural development conditions. However, agriculture and production potentials are not being fully exploited thus inducing lower indices in the economy and society sectors, and somehow restricting local agricultural development. In order to expand agricultural chain and strengthen economic development, several recommendations are advanced based on identified environment issues.