喀斯特地区都安瑶族自治县农业生态经济系统能值分析

收集都安瑶族自治县2004年相关统计资料,用能值法建立能值指标体系,通过能值投资率、能值自给率、环境负载指数、可持续利用指数和单位面积宏观经济价值产出5个指标分析评价都安县农业生态经济系统。结果显示,都安县能值投资率为5.46,能值自给率15.47%,环境负载指数5.53,可持续利用指数0.10,单位面积宏观经济价值产出1.5×105EM$.km-2.-a1。能值指标表明,都安农业生态经济系统能值利用技术水平较低,农业经济发展相对落后,但是系统生产效率较高,在获取经济输入能值方面具有优势;经济发展对环境资源的依赖程度较高,但是对资源环境带来的压力大;系统的可持续性较弱。都安农业生态经济系统进一步的发展应加强都安农业生态经济系统的对外开放程度,提高系统的能值反馈率;优化农业产业结构,发展生态农业,提高能值利用率;治理水土流失,提高土地生产力;合理运用当地条件,发展对外经济;控制人口增长,提高人口素质。

Energy Evaluation of Agricultural Eco-Economic System in Du'an County of Karst Region

By collecting relevant statistical information of Du＇an County in 2004,energy index system via energy theory and energy investment ratio, energy self-sufficiency rate,environmental load index,sustainable utilization index and the output of micro-economic value per unit which comprise the five indexes are biult to evaluate the agro-ecoeconomic system of Du＇an County.The results display that the value of each index are 5.46,15.47%,5.53,0.10 and 1.5×105EM$·km-2·a-1,respectively.The energy index indicates that the technical level of agro-ecoeconomic system energy applicadion is low and the agricultural economic falls behind.While the high productive efficiency of the system indicates the superiority of economic input energy.In order to develop agro-ecoeconomic system,several aspects should be strengthened,such as the openness of agro-ecoeconomic system,raising feedback rate of the system,optimizing the agricultural structure,developing ecological agriculture,improving utilization ratio,controlling soil erosion,increasing land productivity,applying local condition properly,expanding foreign economic,controlling population growth,improving population quality and so on.