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本文应用主成分分析和最优分割相结合的方法,对全国12省的64个马尾松(Pinus massoniana Lamb)种源进行排序和分类。第一、第二主成分累计贡献率达93％以上,综合性较强,降维较合理。研究结果,将马尾松种源分为三个类型:一、南亚热带类型;二、中亚热带中部、南部类型;三、北亚热带和中亚热带北部类型。以两广种源为代表的南亚热带类型在安远、武功山和戈阳三个试验点上均生长最佳,是速生优良类型。马尾松种类的划分,为开展第二阶段有限分布区种源试验提供了依据。
In this paper, 64 Pinus massoniana Lamb provenances were sorted and classified in 12 provinces in China by using principal component analysis and optimal segmentation. The cumulative contribution rate of the first and second principal components is over 93%, which is more comprehensive and the dimensionality reduction is more reasonable. As a result, the Pinus massoniana provenances are divided into three types: one is the South Asia subtropical type; the other is the Central and Southern Central Asia subtropics; the third is the North subtropical and the Middle subtropical North types. The South Asia subtropical type, represented by two broad and diverse sources, grows best at all three test points: Anyuan, Wugong Mountain and Geyang. It is an excellent type of fast growing. The classification of Pinus massoniana provides the basis for carrying out the provenance test in the second stage of limited distribution.