国内美国黄松引种气候适生区2种区划方法的对比研究

为了获得美国黄松适生区划分的最佳方法,根据我国42个引种地的12个气候指标,分别运用模糊相似优先分析方法和主成分-聚类分析方法对美国黄松的引种地进行划分,并将这2种方法区划的结果与美国黄松实际生长状况进行综合对比分析。结果表明,2种分析结果存在一定的差异,对于个别区域划分的类型差别较大。通过与美国黄松实际生长情况对比研究,发现两者均不能完全准确地得到适合美国黄松引种的地区,把2种方法结合起来才是划分美国黄松适生区最好的方法。

A Comparative Study of Two Division Methods on Suitable Ecological Regions for Introducing Pinus ponderosa in China

In order to obtain the optimal division method for the suitable establishment areas of Pinus ponderosa,the introducing areas were divided based on the 12 climate indicators of 42 introducing locations by using fuzzy similitude priority ratio analysis,principal component-cluster analysis.Comparisons were made among the two analytic methods and actual growth of P.ponderosa.The results showed that there existed significant differences between the results of the two methods,and both of them could not give an accurate conclusion about the optimal establishment locations of P.ponderosa.However,the combination of the results of two methods was the best alternative to divide the most suitable areas.