Evolution of Human-Land Relationship and Countermeasures for Adjustment in Yanchi County, Ningxia Autonomous Region
宁夏盐池县人地关系的演变及调适对策

In order to study the evolution of human-land relationship,the case study was conducted in Yanchi county of Ningxia autonomous region.Firstly,the paper briefly discussed the progress and the significance of human-land relationship,and then analyzed "human" subsystem and "land" subsystem respectively.The analysis of "Human" has been conducted through subsystem done from population quantity,population quality and human behavior.The results show that the population numbers is increasing quickly;the population quality is not high,and most population in the study area have engaged in agricultural and animal husbandry production which takes the land as major means of production.The analysis of "land" subsystem has been done from land use,changes of cultivated land and vegetation.The results show that grazing is dominant in land-use.The cultivated land resource in the region is rich,with an unbalanced distribution,and also largely cultivated land is medium-and low-yield fields;the inter-annual status of the grassland has large difference;the distribution of woodland is unbalanced,and also main forest category is coppice and shrubbery.The objective region is an important part of the ecotone of agriculture-animal husbandry in China.It is reported that the grassland resources in Yanchi county occupy 83.7% of the total land area.Therefore,the vegetation status is the most important part of the "land" subsystem.However,there is no coherent statistical data of the change of vegetation in the long time in this region,the NDVI(normalized difference vegetation index) used in the paper could comprehensively reflect the change of vegetation.And then,the paper used the method of correlation analysis,studied the relations among "human" subsystem and "land" subsystem,and summarized the evolution process in human-land relationship in Yanchi county since 1957,divided the evolution process into five phases as well.The problems in human-land relationship are as follows: the quality of population is improving constantly,but still relatively low;workforce's educational level is low.Some countermeasures for resolving the problem are put forward: controlling population growth correspondingly;increasing the transfer of the rural labor force to urban areas;improve plant production level;choose the reasonable manners of grassland use to mitigate the conflicts of the human-land relationship;making use of different resource to handle the resource problem.