山东西部平原粮棉主产区农业生态安全评价与分区研究——以聊城市为例

采用主成分—聚类分析方法对聊城市农业生态安全进行了评价与分区研究,结果表明:主成分分析法对众多评价指标有较强的综合表达,6项主成分表达了原指标体系信息量的96%以上,新变量在理论上较好地反映了农业生态安全的总体要求与耕地、农产品数量等主要方面;样本聚类方法比较客观地反映了研究区域8县(市、区)除农业自然资源外其他农业生产条件方面的差异,可信性较强。

Study on Agri-ecological Security Evaluation and Dipartition of Grain Food and Cotton Production Base

In this paper,based on indexes system,the agri-ecological security evaluation and dipartition of Kaifeng were synthetical evaluated with the principal component analysis and clustering analysis. The results showed that:(1)principal component analysis was efficient in synthetical expression of original indexes,the 6 principal components expressed more than 96 % information of original index system and well reflected in theory collective need,cultivated land and primary products amount,etc,in agriecological security.(2)the classification results from swatch clustering method of 8 evaluation regions reflected impersonally the difference in agriculture production conditions except natural resources of all evaluation regions. The results was beneficial to agricultural eco-environment conservation and sustainable development.