基于灰色模糊评价法的耕地社会功能评价——以重庆市为例

Assessment of the Social Functions of Cultivated Land Based on the Gray Fuzzy Evaluation Method——Take Chongqing as an Example

耕地社会功能主要包括粮食安全功能、提供就业和社会保障功能,且具有衍生性、差异性和功能主导性的内涵特征,据此建立了耕地社会功能的评价指标体系,并以重庆市为例,采用灰色模糊综合评价模型,计算出2001年-2011年重庆市耕地社会功能变化情况.结果表明:研究时段内,重庆市耕地社会总功能呈波动上升趋势,粮食安全功能发挥不稳定,提高就业功能经合理衰退阶段后逐渐恢复,社会保障功能良性提高;且重庆市耕地社会功能受粮食安全功能影响最大,社会保障功能次之,提供就业功能影响最小.

The social functions of cultivated land involve mainly food security ,job creation and social secur-ity ,and are connotationally characterized by derivativeness ,diversity and function-dominance .Based on the above ,an evaluation index system for the social functions of cultivated land was established ,and a grey fuzzy comprehensive evaluation model was adopted to estimate the changes in the social functions of cultivated land in Chongqing in the 2001 - 2011 period .The results showed that in the study period ,the social functions of cultivated land in Chongqing exhibited ,in general ,a rising trend in fluctuation .The three components of social functions of cultivated land were different in importance .Food security ranked first ,followed in sequence by social security and job-creation .In recent years ,the importance of social se-curity function has become increasingly prominent .Food security function is unstable ,because it is affect-ed by weather and other natural conditions ;and job-creation function has seen a gradual recovery after a reasonable recession phase ,because it is affected by national policy of agriculture and employment .