基于主成分分析的呼和浩特市土地生态安全评价

根据呼和浩特市土地生态资源现状,从自然、资源环境、经济与社会三个方面选取了20个指标,构建了评价指标体系。采用主成分分析法对2009~2015年呼和浩特市土地生态安全进行分析,分析结果表明,2009~2015年呼和浩特市土地生态安全状况是逐年走低的。人均GDP、人均公共绿化面积、工业产业比重及农牧业生产资料价格指数等因子是影响呼和浩特土地生态安全的关键因素,保护农牧区土地质量、防治土地退化是保护土地生态安全的根本。

Evaluation on Land Ecological Security in Hohhot Based on Principal Component Analysis

Based on the status of land ecological resources in Hohhot,20 indexes covering nature,resource environment,econo-my and society were selected and the evaluation index system was established. With the principal component analysis,the land ecological security of Hohhot from 2009 to 2015 was analyzed. The results showed that the land ecological security of Hohhot was declining year by year in 2009-2015. Besides,per capital GDP and public green area,the proportion of industry and the price index of agricultural and animal husbandry production materials were the key factors influencing the land ecological se-curity of Hohhot. The key for protection of the land ecological security may lie in the protection of land quality and preven-tion of land degradation in farming and stock-breeding areas.