基于能值分析的毛乌素沙地库伦生态经济圈结构与效益特征

Structure and benefit characteristics of the Kulun ecological economic circle based on the emergy analysis

为探究毛乌素沙地库伦生态经济圈的经济结构与效益,应用能值分析方法对2020年鄂托克前旗394户库伦生态经济系统进行能值计算与评价,比较了农林牧业能值投入与产出并进行结构效益分析。结果表明:依主要能值指标可将毛乌素沙地库伦生态经济圈运营模式分为四类,畜牧型(模式Ⅰ)、林牧型(模式Ⅲ)和农林牧型(模式Ⅱ和Ⅳ),其中模式Ⅰ总产出的能值货币价值最高(760.96$),主要以牧业为主,其中养羊模式对经济的贡献率较大,经济效益最高(年均净收入86.69万元)。模式Ⅲ为林草型库伦,分布着较大面积的人工灌木林草地,年均净收入(21.30万元),经济效益较高。模式Ⅱ和Ⅳ虽均为农林型草库伦,但由于模式Ⅳ养殖规模较小,经济效益远低于模式Ⅱ(模式Ⅱ25.46万元、模式Ⅳ8.81万元)。

In order to explore the economic structure and benefits of Kulun ecological economic circle in Mu us desert,the emergy method was applied to calculate and evaluate the emergy of 394 households in Etok Front Banner,Inner mongolia in 2020,the input and output values of agriculture,forestry and animal husbandry were compared,and the structural benefits were analyzed.The results show that according to the main energy value index,Kulun ecological economic circle can be divided into four modes:Animal raising type(modeⅠ),Forestry-animal raising type(modeⅢ),and planting-forestry-animal raising type(modeⅡ,Ⅳ).ModeⅠhas the highest currency emergy(760.96$);it has scattered forest and grass semi-desert Kulun,mainly depends on animal raising;among which the sheep raising model has a large contribution rate to the economy and the highest economic benefit(average annual net income of 866,900 yuan).ModeⅢis forest-grass type Culun,distributed with a large area of artificial shrub forest and grassland,with annual net income(213,000 yuan)and high economic benefits.Although modeⅡandⅣare both planting-forestry-grass Kulun,the breeding scale of modeⅣis relatively small,so its economic benefits is far lower than the modeⅡ(modelⅡis of 254,600 yuan and modelⅣis of 88,100 yuan).