基于可拓优度评价模型的耕地生态安全评价——以保定市为例

Assessment on Cultivated Land Eco-security Based on Extension Superiority Evaluation Model——A Case Study of Baoding City

为了充分了解保定市耕地生态安全状况,以促进耕地资源的可持续利用,构建了耕地生态安全评价指标体系,并采用可拓优度评价模型对2003—2012年保定市的耕地生态安全进行评价。结果表明,2003—2012年,保定市耕地生态安全水平总体上呈现下降趋势,并具有明显的区域差异。位于保定市西北部山区的涞源县,东部地区的高碑店市、容城县和东南部地区的高阳县、博野县、蠡县以及位于保定市西南部的望都县等县(市)耕地生态安全水平较高;位于保定市中部地区的清苑县、满城县、徐水县和南部地区的定州市、曲阳县耕地生态安全水平较低;位于保定市西北部地区的涞水县、北部的涿州市和西南部地区的顺平县、唐县、阜平县耕地生态安全水平波动较大,且在整个评价期内总体上呈下降趋势。

In order to fully understand the status of the cultivated land eco-security of Baoding,and realize sustainable use of the cultivated land resources,the cultivated land eco-security was evaluated by the extension superiority evaluation model from 2003 to 2012 in Baoding city. The results showed that on the whole,the cultivated land eco-security level increased from 2003 to 2012 in Baoding city,and had obvious regional differences. The cultivated land eco-security level was higher in Laiyuan county in the mountainous regions of the northwest,Gaobeidian city and Rongcheng county in the east,Gaoyang county,Boye county and Lixian county in the southeast,and Wangdu county in the southwest of Baoding city; the cultivated land eco-security level was lower in Qingyuan county,Mancheng county and Xushui county in the centre of Baoding city and Dingzhou city,Quyang county in the south of Baoding city; on the whole,the cultivated land eco-security level fluctuated greatly and decreased in Laishui county in the northwest,Zhuozhou county in the north and Shunping county,Tang county and Fuping county in the southwest of Baoding city from 2003 to 2012.