SPATIAL SCALE EFFECTS OF REGIONAL AGRICULTURE LAND RESOURCES SUSTAINABLE USE——A CASE STUDY OF JING-JIN-JI REGION
以京津冀地区为例，构建农业土地资源可持续利用的三级结构，评估不同空间尺度下的土地利用可持续性，并分析尺度效应，提出分级对策。
Nowadays,the researches of sustainable agricultural land resources use(SALRU) mainly focus on the field such as concept,systematic analysis,evaluation and countermeasure.At the same time,based on the regional differences,the practice researches for regional SALRU are processed widely.But the practice researches are almost a sort of single-level model method,and the relation of regional spatial scale is ignored,which will make it difficult to bring forward systematic and scientific decision-making.In this study,Jing-jin-ji Region is selected as the study case.Using methods of systematic theory,geographical information system(GIS) technology,field survey and statistical ways,this paper,based on the goal,types and regional resources of SALRU,builds the 3-level structure of SLRU system.And the corresponding rating of regionalism is confirmed.Subsequently,according to the rating of regionalism,3-level evaluation units of SALRU for Jing-jin-ji Region are settled.Then,using the evaluation model of integrative index,this paper evaluates systematically the sustainability of land resources use in Jing-jin-ji Region.Using the results above evaluated,spatial scale effects in Jing-jin-ji Region are analyzed,and corresponding countermeasures are put forward in different levels for sustainable land resources use.