关键词: 四川省, 耕地面积, 动态变化, 耕地利用效率

Abstract: [Objective] The evaluation of using efficiency of cultivated land is the evaluation about the productivity effect after the investment put into the cultivated land, and its aim is to value whether the actual benefits reach the anticipated benefit according to the investment. [Method] Based on the Statistics and Census Data of Sichuan from 2000 to 2012, 10 indexes from the field of economy, technology and population were selected as factors which have affect on the change of the quantity of cultivated land, principal component analysis was used to analyze the main driving factors, and DEA (data envelopment analysis)was adopted to build evaluating system to measure the using efficiency of the cultivated land. [Results] The principal component analysis shows that the factors "economy's development and population" and "agricultural science" could summarized all the factors, and the percentage reaches 97.926%, as a result, these two factors were con-firmed to be the main driving factors that leaded to the change of the quantity of cultivated land in Sichuan. besides, the factor "policy" played an important role in the change of cultivated land of Sichuan;The DEA (data envelopment analysis)shows that the comprehensive using efficiency of cultivated land of Sichuan province was 0.956, and the pure technical efficiency was 0.999, and scale efficiency was 0.957, which showed a relatively high level and good stability. [Conclusion] The evaluation method could provide more ideas for future researches on cultivated land use, which could also provide more references for the benefit evaluation of land using.

Key words: Sichuan province, cultivated area, dynamic change, using efficiency of cultivated land