基于主成分分析法的湖南省农用地集约利用评价

Evaluation of Agricultural Land Intensive Use in Hunan Based on Principal Component Analysis Method

采用主成分分析方法,从市(州)层面对湖南省农用地集约利用进行定量综合评价,并依据评价结果进行聚类分析。结果表明:2008年,湖南省农用地可划分为集约利用、中度集约利用、低度集约利用三等,归并为6类;环洞庭湖地区及湘江流域的岳阳、常德、益阳、长沙、湘潭、衡阳、永州7市农用地处于集约利用状态,其中,长沙、湘潭归并为一类,岳阳、益阳、衡阳归并为一类,常德、永州归并为一类;湘中娄邵盆地的娄底、邵阳和湘东的株洲3市农用地处于中度集约利用状态,归并为一类;湘西的怀化、湘西州、张家界和湘南的郴州4市(州)农用地处于低度集约利用状态,其中,郴州、怀化归并为一类,张家界、湘西州归并为一类。研究结果符合区域农用地利用实际,对湖南省农用地集约高效利用具有一定的指导意义。

In order to understand the situation and spatial layout of agricultural land intensive use in Hunan Province, the authors built a set of evaluation index system of agricultural land intensive use, tried to use principal component analysis method to make a quantitative and comprehensive evaluation on agricultural land intensive use from city （prefecture） level in the province, and conducted cluster analysis with the evaluation results. The results show that in 2008 the agricultural land use in the province could be classified into three grades such as intensive utilization level, moderate intensive utilization level, low intensive utilization level, and could be inducted into six types. Agricultural land of the seven cities in the Dongting Lake rim area and the Xiangjiang River Basin such as Yueyang, Changde, Yiyang, Changsha, Xiangtan, Hengyang, Yongzhou was in intensive utilization situation, in which Changsha and Xiangtan were of the same type, Yueyang, Yiyang and Hengyang another type, and Changde and Yongzhou the third type. Agricultural land of Loudi, Shaoyang, Zhuzhou in central and eastern Hunan was in moderate intensive utilization situation, and could be merged into the same type. That of Huaihua, Xiangxi, Zhangjiajie and Chenzhou in western and southern Hunan was in low intensive utilization situation, in which Chenzhou and Huaihua the same type, Zhangjiajie and Xiangxi another type. The research results were in accordance with the actual conditions in Hunan Province.