区域耕地生态价值补偿量化模型构建——以江苏省为例

研究目的:探讨区域耕地生态价值补偿量化的思路与方法。研究方法:以耕地生态服务价值为依据,以生态超载指数作为耕地生态服务价值在各区域间转移的测度,结合地区社会经济发展水平,构建市域间生态价值补偿量化模型,并以江苏省为例,测算各区域间耕地生态价值补偿量。研究结果:(1)2011年江苏省耕地生态服务价值北高南低,生态超载指数南亏北盈,表现出耕地生态供给和生态消费"空间异位"现象。(2)2011年江苏省整体上向外输出耕地生态服务价值,可获得16.99×108元耕地生态补偿费。(3)省内苏南地区及苏中南通市需分别支付104.83×108和2.88×108元耕地生态补偿费,苏中(除南通市)和苏北地区可分别获得24.68×108和100.05×108元的补偿费。研究结论:计算结果与各市的实际情况吻合,可为江苏构建耕地生态补偿路径提供参考,该测算方法对类似地区编制土地利用总体规划时,以区域生态价值量确定耕地保护指标,构建耕地生态价值补偿机制具有指导作用。

Building Quantitative Model of Ecological Value Compensation for Regional Arable Land: A Case Study of Jiangsu Province

The purpose of this paper is to discuss framework and quantitative methods for assessing ecological compensation for arable land preservation between regions. By using the ecological overload index as the measure the study built a quantitative model of ecological value compensation between municipalities in terms with ecological service value of arable land and regional socio-economic development level. Taking Jiangsu Province as an example, the study estimated the amount of ecological value compensation of arable land for each region. The results show that 1） in 2011, the ecological service value of arable land of Jiangsu Province was higher in the north and lower in the south of Jiangsu Province, and there was an ecological deficit in the south and an ecological surplus in the north, which indicates a phenomenon of “space ectopic” between ecological supply and consumption of arable land. 2） In 2011, Jiangsu Province provided ecological service value of arable land to outside regions at the amount of 1.699 billion Yuan. 3） Therefore, the southern part of Jiangsu Province and especially the Nantong City in themiddle part of Jiangsu Province shall be paid 10.483 and 0.288 billion Yuan as land compensation fee, respectively. The other middle part of Jiangsu Province（except Nantong city）and the northern part shall be paid 2.468 and 1.005 billion Yuan as compensation fee, respectively. The paper concludes that the results of the study are consistent with the actual situation in each municipality. It suggests the proposed method of this papercan be used for other similar regions to measure the ecological compensation.