山西省耕地动态变化及驱动力研究

根据山西全省及各地市（1979～2005）耕地数据,分别总结出全省耕地面积变化和各市耕地利用动态度、相对变化率及耕地重心变化;结合近27年来全省社会各经济因素,采用主成分分析法,对山西省耕地驱动因子进行了研究。结果表明：山西全省耕地总面积分阶段呈缓慢减少趋势（1997年突变点）;1997～2004年各市耕地利用动态度均...

Dynamic change of cultivated land and driving forces in Shanxi Province

The change of cultivated land area and land use dynamic degree,relative rate of changes,and cultivated land gravity center were calculated at provincial and city levels respectively based on the cultivated land statistical data for the period 1979～2005 in Shaanxi Province.The driving factors of cultivated land in the Province were analyzed with the provincial socio-economic factors in the last 27years using the method of PCA(principal component analytical).The results showed that a slowly decrease trend in stages was found in the total cultivated land area in Shanxi Province(the change point was in 1997);The cultivated land use dynamic degree in all cities were negative,while the relative change rates of land use were positive;Cultivated land gravity center changed in all the cities,and the largest change was in Shuozhou;The five driving factors of socio-economic development,demographic factor,technological advances in agriculture,food security and livestock production were found.