加勒比松和湿地松形态、密度与抗风能力分析  

Principal Component Analysis of the Morphology,Density and Wind Resistant Ability of Caribbean pine and Slash pine

作　　者：徐慧兰[1] 冯源恒[1] 吴东山[1] 陈新华 许承荣 杨章旗[1] 

机构地区：[1]广西壮族自治区林业科学研究院,广西南宁530002 [2]广西壮族自治区南宁市林业科学研究所,广西南宁530107 [3]广西壮族自治区合浦县林业科学研究所,广西合浦536199

出　　处：《福建林业科技》2017年第2期65-68,85,共5页Journal of Fujian Forestry Science and Technology

基　　金：广西八桂学者创新团队(松树资源培育及产业化关键技术;2011A015);"十二五"农村领域国家科技计划专题(广西国外松高世代育种和种苗繁育关键技术研究与示范;2012BAD01B0203-04);"十二五"农村领域国家科技计划专题(加勒比松高世代育种和种苗繁育关键技术研究与示范;2012BAD01B0203-1)

摘　　要：为了具体分析加勒比松和湿地松抗风能力,对遭受台风袭击的加勒比松和湿地松的树高、枝下高、胸径、冠幅和密度等进行测定,并对这些指标进行主成分分析。结果显示:形态和密度指标主成分分析导出的综合得分分值(F)与受损等级相关性极显著,表明可利用易测量的形态和密度指标,间接判断加勒比松和湿地松的抗风能力;6项指标对抗风能力的权重大小依次为:冠幅>密度3>枝下高>平均密度>胸径>树高,形态指标对抗风能力的权重大小依次为:枝下高>冠幅>胸径>树高;加勒比松和湿地松形态和密度指标的具体差异不大,但加勒比松的抗风能力远优于湿地松,可以推断抗风能力不受某几个重要指标的左右,而是多个指标共同作用的结果。In order to analyze the differences of the wind resistant ability of Caribbean pine and Slash pine, morphological and density indexes of Caribbean pine and Slash pine were measured after a typhoon hit. Correlation between wind resistant ability and those in- dexes were analyzed by the way of PCA. The results showed that F comprehensive score which derived from PCA and the damage lev- el were significantly correlated. The morphological and density indexes can indirecdy estimate the wind resistant ability of Caribbean pine and Slash pine. The weight of several indexes which considered density to the wind resistant ability was as follows： crown 〉 den- sity 3 〉 height under branch 〉 average density 〉 DBH 〉 height. The weight of morphological indexes to the wind resistant ability was as follows ： height under branch 〉 crown 〉 DBH 〉 height. Morphological and density indexes of the Caribbean pine and Slash pine were not that different,but the wind resistant ability of the Caribbean pine was much better than that of the Slash pine. It can be concluded that the wind resistant ability is not affected by few important indexes,but the results of combined effects of a number of indexes.

关 键 词：加勒比松 湿地松 形态和密度指标 抗风能力 主成分分析 

分 类 号：S791.244[农业科学—林木遗传育种] S791.248[农业科学—林学]