耕地易地补充经济补偿的生态价值——以江阴市和兴化市为例

Evaluation of ecological value compensation using exchange of farmland:a case study with data from Jiangyin and Xinghua,China

以快速发展、后备资源极其匮乏的江阴市和发展相对较慢、具有一定可开发耕地资源的兴化市为研究区,探讨区域耕地保护经济补偿机制。从区域土地利用的角度,选取了区域土地利用结构、自然资源和土壤条件等对生态环境有较大影响的指标对耕地保护易地补偿的生态环境状况予以测算。同时,选取区域污染治理资金投入能力和科技投入力度等指标测算区域生态环境修复的能力,并从CO2的固定、O2的释放、土壤质量的保持、水源的涵养等方面对两区域的生态服务价值其进行了量化。结果表明:从2010年到2015年,两地生态价值而呈不断增长态势,补偿价值将由244008.10元/hm2上升到245871.37元/hm2。这一价值将应由兴化市保护耕地方支付给江阴市产业发展方向。

The ecological compensation principle is designed to enhance the input of ecological protection interests in economic development and to counterbalance the ecological impacts of such developments when implemented.In this article,we evaluated the ecological compensation mechanism for regional farmland protection using exchange of farmland in two typical regions in China,Jiangyin（with less arable land resource） and Xinghua（with much arable land resource）.First,from a perspective of regional land use,three major eco-environmental impact indexes,land use structure,distribution of natural resources,and soil conditions,were used to calculate the impact on ecological environment of economic compensation by exchange of farmland.Second,based on the collected data of carbon dioxide fixation,oxygen release,soil quality maintaining and water conservation,ecosystem services value was quantified.The authors conclude that,from the year 2010 to 2015,the ecological value in Jiangyin and Xinghua will continuce to increase.The economic compensation value will increase from 244008.10 to 245871.37 yuan per hectare.This value should be paid to Jiangyin City（the supplier of farmland protection task） by Xinghua City（the receiver of farmland protection task）.