Study On Evaluation Of Sustainable Land Use In Agro-Pastoral Zone Of Northeast China

In recent years,with the speed of industrialization and urbanization,land resources have been seriously damaged.The agro-pastoral zone of northeast china was a typical fragile eco-environment area whose land desertification and soil erosion were more prominent under the long term rough land application.This situation had a serious impact on the local economic development and production,and seriously restricted the sustainable use of local land.However,the researches on sustainable land use of agro-pastoral zone of northeast china were rather scarce.Moreover,the existing research had some defects in index system and evaluation model,so we need to strengthen research on these aspects.This paper takes the Northeast agro-pastoral zone as the research object.Based on the existing research and the actual situation of land resource utilization,the evaluation index system was constructed from economic possibility,sustainability of resources environment and social acceptability.Then the traditional TOPSIS method was improved and an evaluation model based on the improved TOPSIS method was constructed.From two angles of time and space,the author did his research on sustainable land use of Baicheng,Jilin province.At last,the obstacle factor was used to diagnose the obstacle factors of different time and space which affect the level of sustainable land use in Baicheng and some suggestions were put forward.The results show that:(1)the level of sustainable land use in Baicheng had been gradually improved from 2005 to 2014 with the comprehensive close degree increasing from 0.3464 to 0.6262.The level of sustainable land use had risen from lower level to higher level.(2)According to the classification index,the economic feasibility of Baicheng is steadily rising from 2005 to 2014.The sustainability of the resources and environment is rising first and then decreasing,and the overall trend is rising.The volatility of social acceptability is larger and the increase or decrease alternates,and the overall trend is on the rise.(3)There are differences in the sustainable utilization of land in 5 counties in Baicheng in 2014.The level of sustainable land use from big to small are Zhenlai County,Tongyu County,Taonan City,Taobei District,Da'an City.(4)In terms of factor barriers,the main obstacle factors affecting the sustainable utilization of land in Baicheng are the natural population growth rate,Population density,green coverage rate of developed areas,grassland coverage,and third industry output values accounted for GDP.