Analysis On The Change Characteristics Of Cultivated Land Quality Grade In Qianxi County

Widely absorbed research achievements on the changes of cultivated land quality and the driving forces, taken the agricultural land classification in2003,and the investigation data of land use change of Qianxi County in2011as the research basis,then supplement survey the new farming area,land consolidation project areas,and which area the natural quality factors has been changed significantly, then analysis the change of cultivated land quality in Qianxi County, and use SPSS software to establish the linear regression equation, studied the driving mechanism of the change of cultivate land in Qianxi. The results as following:1) The cultivated land quality grade in Qianxi County do not breakthrough, but in some townships which have good natural conditions and take good land reclamation measures, such as Yu Huzhai, Yin Zhuang, Xin Ji,Tai Pingzhai, the cultivated land quality grade are improved.At the same time,limitd by nature and urban construction and other non-agriculture project such as "around the mountain",some of the township had droped the grade,like Old City,Han Erzhuang.Even happened Phenomenon that the original grade disappeared, such as the10grade in Han Erzhuang,the12grade in San Tunying. Affected by the reclamation and development of cultivated land,some of the township had increased cultivated land wich the quality grade is not too good,such as Bai Miaozi,Dong Lianhua,Dong Huangyu,Han Erzhuang. Newly increased cultivated land mainly concentrated in grade11and grade12,2) Analyzed the driving forces of cultivated land quality changing by the combination of qualitative and quantitative analysis method. Employed establish the linear regression equation analysis to study the eight variables, the results indicated that the intensities of land management measures,rate of non-agriculturalization of economy,urbanization, radiation of large city were the main driving factors that affected the grade changes of cultivated land in Qianxi County,regularly cultivated area,total output of grain also make certain contributions to the grade changes.