基于生态系统服务价值的扬州市农地非农化生态效应测评

农地非农化对区域的经济增长、生态环境保护影响较大，测算区域农地非农化的生态环境效应具有重要意义。近年来扬州市农地非农化规模较大，研究其生态系统服务价值的变化情况，可以为该区土地资源可持续利用和生态环境保护提供决策支持。运用中国生态系统服务价值当量因子表和扬州市单位面积农田生态系统提供的食物生产服务的经济价值，以及1996-2004年扬州市土地利用变更调查数据，对扬州市农地非农化引发的生态系统服务价值变化进行估算和比较。研究表明，9年间扬州市共有17 450.91 hm2农地实现非农化，并造成生态系统服务价值减少215.47×106元。从不同类型生态系统服务功能价值变化来看，废物处理价值减少最多，娱乐文化价值减少最小；从不同土地利用类型的生态系统服务价值变化来看，耕地和其他农用地非农化造成的损失最多。

ECOLOGICAL EFFECT EVALUATION ON FARMLAND NON-AGRICULTURAL CONVERSION BASED ON ECOSYSTEM SERVICE VALUES IN YANGZHOU CITY

The farmland non-agricultural conversion is key to regional economic development and eco-environmental protection.Recently, there is a big scale of farmland non.agricultural conversion.To study the changes in ecosystem service values can provide a reference for making policies in sustainable development of land resources and eco-environmental protection. This paper, by means of ecosystem service values and economic values of food production from unit farmland, and 1996-2004 land survey data, estimates and compare the ecosystem service values of farmland non-agricultural conversion, indicates a total 17 450.91 hm2 converted with a decrease in ecosystem service value by 215.47×106 RMB.From different ecosystems, the ecosystem service values decrease most while entertainment culture decreases least; from different land use categories, the ecosystem service values has a biggest loss from plowland and other agricultural land non-agricultural conversion.