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

Kong Wei

Abstract

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.

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Key concepts: Ecosystem services, Agriculture, Ecosystem, Agricultural land, Service (business), Land use, Business, Unit (ring theory)