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| 基于能值的天山北坡经济带农牧系统可持续性评估 | |
| 引用本文： | 张玉芳,董孝斌,严茂超,张新时. 基于能值的天山北坡经济带农牧系统可持续性评估[J]. 生态学杂志, 2007, 26(11): 1901-1906 |
| 作者姓名： | 张玉芳 董孝斌 严茂超 张新时 |
| 作者单位： | 1. 北京师范大学资源学院环境演变与自然灾害教育部重点实验室,北京,100875 2. 中国科学院地理科学与资源研究所,北京,100101 3. 北京师范大学资源学院环境演变与自然灾害教育部重点实验室,北京,100875;中国科学院植物研究所,北京,100093 |
| 摘 要： | 应用能值分析理论和方法,对新疆天山北坡经济带农牧业生态经济系统进行了分析和评价,通过一系列的能值指标定量分析了该地区的农牧业系统的能值流动。结果表明:环境资源对农牧业系统的贡献很大,环境资源能值占总能值利用的79.2%,高于全国农业系统平均值(13%);净能值产出率为4.81,高于我国平均值(0.27),说明该区域农牧系统生产有一定的竞争优势;农牧业产品的宏观经济价值大于市场价值,这是由于农牧业生产中有相当大一部分环境资源无偿投入所致;环境负载率指标为0.373,低于我国农业系统的环境负载率(2.8),环境压力较小;可持续发展指数为12.90,有较好的发展潜力,据此,提出了一系列促进区域农业可持续发展的产业结构调整措施。 |
| 关 键 词： | 能值 天山北坡经济带 农牧业系统可持续性评估 |
| 文章编号： | 1000-4890（2007）11-1901-06 |
| 修稿时间： | 2007-01-23 |
Emergy evaluation on the sustainability of cropping-grazing system in economic belt on northern slope of Tianshan Mountains |
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| ZHANG Yu-fang,DONG Xiao-bin,YAN Mao-chao,ZHANG Xin-shi. Emergy evaluation on the sustainability of cropping-grazing system in economic belt on northern slope of Tianshan Mountains[J]. Chinese Journal of Ecology, 2007, 26(11): 1901-1906 | |
| Authors: | ZHANG Yu-fang DONG Xiao-bin YAN Mao-chao ZHANG Xin-shi |
| Abstract: | By the methods of emergy analysis,this paper evaluated the eco-economic system of cropping-grazing in the economic belt on northern slope of Tianshan Mountains.A suit of emergy indices was adopted to quantitatively assess the emergy flows.The results showed that environmental resources made a great contribution to the cropping-grazing system.The emergy of environmental resources occupied 79.2% of the total,and the net emergy yield rate was 4.81,which were much higher than the mean values(13% and 0.27)of the whole nation and illustrated that the cropping-grazing system in this area possessed a certain competitive advantage in its production.The macroeconomic value of the cropping-grazing products was much higher than their market value,due to the large input of 'free'resources from the environment to the cropping-grazing production.The value of environmental loading rate was 0.373,which was far below the national average of 2.8 and indicated a less pressure on the environment.The emergy sustainability index was 12.90,showing a good development potential of this system.Some measures about the industrial structure adjustment were proposed for promoting the sustainable development of regional agriculture. |
| Keywords: | emergy economic belt on the northern slope of Tianshan Mountains sustainability evaluation of cropping-grazing system |
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