干旱内陆盆地绿洲种植业生态经济系统的能值分析——以新疆焉耆盆地为例

以新疆干旱内陆典型代表区域——焉耆盆地为研究对象,运用能值分析理论和方法对该区域种植业生态经济系统的能值投入和产出进行了分析。结果表明:(1)焉耆盆地绿洲2006种植业生态经济系统的能值投入以不可更新的工业辅助能为主。在不可更新工业辅助能中,化肥对农业的产出影响较大;(2)该区域的能值利用强度高于全国平均水平,说明农业的科技投入水平较高;(3)系统的净能值产出率高于全国平均水平和发达地区水平,表明系统具有较高的经济活力,农业系统整体功能较好,运转效率较高,能值回报率较高;(4)农业生产对整个区域生态系统的压力较轻,引起的生态环境破坏较小,农业环境资源还有进一步开发利用的潜力;(5)焉耆盆地种植业系统具有可持续发展的潜力。

Emergy Analysis of Oasis Planting Economic Ecosystem in Arid Inland Basin-a Case Study of Yanqi Basin

In this paper, taking the region of arid inland as the representation region-a case study of Yanqi basin, based on the theories and methods of emergy, emergy inputs and outputs of planting economic ecosystem were analyzed. The result showed that: (1) The unrenewable industrial assistance emergy were mainly in the region of farming eco-economic system, and the chemical fertilizers greater impacted on agriculture output; (2) The intensity of emergy use was higher than the national average on agriculture, which indicated that there were a higher levels of investment in science and technology in the region; (3) The net output rate of emergy in the planting economic ecosystem was higher than the level of the national average and developed regions of Guangdong Province, which showed that the system had higher economic vitality, and the better function of agricultural system, more efficient operation, higher returns of emergy; (4) The rate of environmental loading was a lower level, which indicated that agricultural production had less pressure on the entire regional ecosystems, and caused less damage to the ecological environment, and agriculture, environmental resources for further development and utilization; (5) The sustainable development index in Yanqi Basin indicated that farming systems in the region belonged to sustainable development areas.