江汉平原耕地变化的经济损失分析

Estimate of Economic Loss Stemming From Cultivated Land Decrease in Jianghan Plain

对江汉平原2000～2003年耕地流失的基本态势及其经济损失进行定量分析，为缓解耕地流失形势、确定耕地流失的经济补偿提供决策依据。估算表明，2000～2003年江汉平原耕地资源净减少28968．69hm^2，耕地流失所带来的经济损失达82．07亿元。年均损失20．52亿元。其中，耕地资源的市场价值损失72．61亿元，占88．47％；目前无法通过市场价格机制体现的非市场价值流失9．46亿元，占11．53％。耕地流失经济损失的货币化计量，是有效解决农地生态补偿机制构建的一个技术难题，为确定农地生态补偿标准、规范人类活动的性质和干扰程度、限制土地的过度开发和优化农地景观格局提供决策依据。图1，表6，参14。

According to the random samples, we can evaluate the total value of different types of cultivated land in Jianghan plain using income approach and contingent valuation method. Based on it, we estimated the economic loss of cultivated land decrease from 2000 to 2003. The results showed that there are 28 968.69 hectares cultivated land losses from 2000 to 2003, and the value of cultivated land lost 82.07 × 10^8 Yuan. There are almost 20.52 × 10^8 Yuan losses per year. Among those, the direct market value of cultivated land decrease is 72.61 × 10^8 Yuan, and the proportion of market value loss in cultivated land resource value loss is 88.47%. The cultivated land＇s non-market value loss is 9.46× 10^8 Yuan and its proportion is 11.53%.