武汉市耕地资源的社会生态价值估算

Estimation on Socio-ecological Value of Arable Land Resource in Wuhan City

耕地利用存在的外部性,除了给国家和农户带来经济效益外,还具有社会生态效益。在构建耕地资源价值体系的基础上,探讨了耕地资源社会稳定价值、社会保障价值和生态效益价值的估算方法。研究结果表明:(1)武汉市耕地资源社会稳定效益逐年增长,由1996年的1.50×108元增长到2009年的4.24×108元;(2)耕地资源社会保障效益逐年递减,由1996年的7 886.65元/(hm2·a)下降到2009年的6 618.74元/(hm2·a),表明农村社会保障体系亟待建立。(3)耕地资源生态效益价值呈现先下降后上升的趋势,耕地数量的变动是重要的影响因素。武汉市耕地资源的社会生态价值总体变动趋势为上涨。基于我国城市土地利用中存在外延式扩张和粗放、低效利用并存的现象,有必要全面考虑耕地资源的价值。

The externalities of arable land utilization brings both economic and socio-ecological benefits to state and farmers. The estimation methods of social stability value, social security value and ecological benefits value of arable land resources were discussed based on the construction of appropriate value system. The results showed that： （1） The social stability benefit of arable land resources in Wuhan City was increasing year by year, from 1.50 × 108 yuan in 1996 to 4.24 × 108 yuan in 2009; （2） The social security benefit of arable land resources was decreasing year by year, from 7 886.65 yuan/（hm2 · a） in 1996 to 6 618.74 yuan/（hm2 · a） in 2009 , which indicated that the social security system in rural needed to be established urgently. （3） The ecological benefit value of arable land resources showed a trend of rising after falling, and the change of arable land quantity was an im- portant influence factor. The general socio-ecological value fluctuant trend of arable land resources in Wuhan City was rising. It is necessary to fully take into account the value of arable land resources due to the coexis- tence of extension growth, and extensive, inefficient utilization of city land in our country.