关键词: 生态敏感性, 县域, 土地利用变化, 耕地后备资源, 土地利用强度

Abstract: According to the data of land use status from 2011 to 2015, the correlation between land use intensity and ecosystem service value of 10 pilot counties （cities） was calculated and analyzed, so as to establish the number of ecological sensitivity and evaluate the ecological sensitivity degree of pilot counties （cities） under land use change from 2011 to 2015. The restrictive factors of pilot counties （cities） were put forward, and the problems in the development of cultivated land reserve resources in different types and regions were analyzed. The results showed that the ecological environment of low sensitive areas is all right,and the terrain of low sensitive areas was relatively flat, and the main limiting factors of the unfavorable cultivated reserve resources are few, which were beneficial to the development of cultivated reserve resources; The middle sensitive areas’ limiting factors were more, and there were mainly soil texture, soil salinization, ecological conditions etc., and the ecological environment can’t be guaranteed and can be affected by the development of reserve cultivated land resources easily, which should full consider the economic benefits, social benefits and ecological benefits; The ecological environment of high sensitive areas was easily to be damaged, and the limiting factors of developing reserve cultivated land resources were more than middle sensitive areas’, when developing reserve cultivated land resources detailed development plan according to the actual situation can be made with the direction of improving the ecological environment, and the water balance analysis can be carried out.

Key words: ecological sensitivity, county area, the land use change, reserve cultivated land resources, land use intensity