关键词: 农牧交错带, 土地整理, 生态服务价值, 景观格局, 土地利用/覆盖

Abstract: The objective of this study is to provide a scientific enlightment for future ecological land use arrangement that can not only ensure the food supply,but also protect the eco-environ-mental quality,in the transition region of the farming-pastoral zone,through prohibiting from exploiting blindly wetlands and reclaiming farmlands from lakes.Although the concept of land arrangement is firstly provided in Land Management Law of the People's Republic of China enacted in 1998,the works of land arrangement (such as land development and renovation,land reclamation) have already been unfolded for a long time.Through the analysis of land use changes from 1986 to 2000,the traces of land arrangement are derived.At the same time,the ecological evaluation of land use changes will provide a scientific basis for future land arrangement work.Zhenlai County,the typical transitional belt of the farming-pastoral zone in the west of Jilin Province,is chosen as a case study area in this paper.Based on the interpretation of Landsat data,which are distilled from digital images taken in 1986,1996 and 2000 respectively,the land use and land cover changes are studied,the analysis of shape readjustment and the evaluation of the ecosystem services function of readjustment in Zhenlai County are unfolded applying the transitional matrix,landscape pattern method and ecosystem services function method.The preliminary results are as follows:1)Farmlands and pastoral land are the main land use categories in Zhenlai County;2)from 1986 to 1996,the work emphasis on land arrangement is the transformation between cultivated land and unused land,such as consolidating farm plots and developing unused land;3)and from 1996 to 2000,the work emphasis is the transformation of farmlands to grasslands.The land use arrangement will be bound to lead to the value changes of ecosystem services function,but with the degradation of eco-environment,the tiny changes of uncontrolled unit,such as wetland and water area,will induce the prodigious transformation.So the future focus and difficulty are to realize the ecological land arrangement from the point of view of cultivating ecosystem.

Key words: farming-pastoral transitional zone, land arrangement, ecosystem services function value, landscape pattern, land use and land cover change