甘肃省耕地资源生态安全评价

为科学评价甘肃省耕地资源的生态安全及其变化,构建了评价指标体系,并对甘肃省1991～2010年耕地资源的生态安全动态变化状况及空间差异进行了分析,同时对耕地资源的生态安全障碍因素进行了初步探讨.结果表明:1991～2010年甘肃省耕地资源生态安全指数总体不断下降;1991～2010年甘肃省各市(州)的耕地资源生态安全状况变化情况不尽相同,并伴有集聚趋势;影响甘肃省耕地资源生态安全指数的主要障碍因子为耕地废水、单位耕地农药用量、单位耕地化肥用量以及单位耕地的废渣堆放量.

Ecological security appraisal of cultivated land recourse of Gansu Province

In order to estimate scientifically ecological security and its change of cultivated land resources in Gansu Province,the evaluation index system of ecological was constructed and ecological security dynamic change situation was analyzed of cultivated land resource during 1991 to 2010 and barrier factor of ecological security was discussed.The results showed that the ecological security index of cultivated land resource was decline from 1991 to 2010.The change of cultivated land resource ecological security index was different in each city and state during 1991 to 2010 and there was a assemble trend in Gannan City,Longnan City and Linxia City,which cultivated land resource ecological security index was higher.The main obstacle factors of cultivated land resource ecological security was farmland water,arable land,farmland fertilizer pesticide dosage units as well as the unit of farmland waste dumps.