Human factors analysis of land use/cover change in Yanchi County
盐池县土地利用/覆被变化的人文因素分析

Taking Yanchi County located in western China as the study area,based on landuse change survey and socio-economic statistical data,the human factors index system of land use/cover changes（LUCC） was established.Using multiple linear regression analysis and gray correlation analysis,Yanchi County＇s population,wealth status,socio-economic,technique,policy and cultural values of factors were analyzed,as well as the leading human indicators for the LUCC.The results showed that： 1） land use in Yanchi County was mainly farmland,forestland,grassland,in 1998—2007,farmland and grassland significantly reduced,but forest land proportion increased,the remaining types of land use/cover changed very little.2） the human factors drived the LUCC,but their importance is different,the influence of demographic,cultural attitudes is larger,policy,socio-economic is medium,rich or poor condition and the skilled is lower.3） The leading impact indicators of farmland and grassland is similar,that is mainly the sex ratio,ethnic minority population,in rural areas the proportion of workers of the entire working population of the community,the proportion of output value of tertiary industry,agriculture population density,and so on,The leading impact indicators of forestland is quite different,that is mainly the proportion of effective irrigated area,agricultural service ratio,output of meat,eggs and milk,per capita GDP,the proportion of dependable crop area.We should increase agricultural technical support to ease the shortage of human and animal water use and agricultural water use status quo,to develop feeding livestock breeding economy;guide the rural population engaged in tertiary industry,increase revenue,reduce the pressure of population on agricultural land,at the same time to control the desertification of abandoned farmland.