基于能值分析的德州市种植业生态经济系统可持续评价

采用能值分析的理论与方法,基于德州市2009年统计数据以及调查数据,对德州市种植业生态经济系统的能值投入与产出进行分析。结果表明:在德州市2009年种植业生态经济系统能值投入中,可更新环境资源、不可更新工业辅助能、可更新有机能的能值分别占系统能值投入总量的4.99%、81.31%、13.70%,其中种植业机械能值投入占不可更新工业辅助能的57.80%,说明德州市的种植业生态系统主要依赖工业辅助能的投入,且机械化程度较高。高太阳能值转换率、高净能值产出率与高环境负荷率说明该地区农业现代化种植模式水平较高,但环境压力也很大。基于此,本文提出了下一步的可持续发展建议:降低不可更新工业辅助能的投入,增强种植业发展可持续性;调节环境资源与有机能的投入比例,降低环境负荷率;调节种植结构,增加净能值产出率。

Sustainable Development Evaluation of Planting Eco- economic System Based on Emergy Analysis in Dezhou

The emergy input and output were analyzed based on the theory and method of emergy analysis and statistical and investigating data of Dezhou in 2009.The results showed that the renewable environmental emergy,non-renewable industrial supplementary emergy,and renewable organic emergy was 4.99%,81.31% and 13.70% of the total emergy input respectively,in which,the specially emergy of farming machinery was 57.8% of not-renewable industrial supplementary emergy.It indicated that Dezhou farming ecological system mainly relied on the non-renewable industrial supplementary emergy input,and there was a high level of mechanization.The high transition rate of solar emergy,the high net emergy output rate and the high environmental loading rate showed that Dezhou had high level of planting model of agricultural modernization and big environmental pressure.Therefore,the main proposals for sustainable development of Dezhou planting industry were put forward as reducing non-renewable industrial supplementary emergy input to enhance the plantation development sustainability,regulating the input ratio of environmental resources and organic emergy to reduce the environmental load rate,and adjusting the planting structure to increase the net emergy output rate.