综合评分与PCA在直干大叶相思选优中的应用  

Application of PCA&Multiple-scoring in Selecting Plus-tree of Straight-stem Acacia auriculiformis

作　　者：孙冰[1] 杨民权[1] 何耀洪 

机构地区：[1]中国林业科学研究院热带林业研究所,广州市林业科学研究所

出　　处：《林业科学研究》1995年第6期641-646,共6页Forest Research

基　　金："八五"国家重点攻关项目

摘　　要：应用５株优势木法在海南岛尖峰岭和琼海的２０ｈｍ２大叶相思人工林中初选出优树１０株，入选率为１％，对候选优树的树高、胸径、干形、冠形和健康状况等１０个因子进行测定并数量化，所得数据运用ＳＴＡＴ程序进行方差分析和主成分分析。结果表明：优树、优势木和林分间高径生长的差异极显著，影响优树质量性状的主要因子为高径生长、干形（通直度和圆满度）及自然整枝情况。综合评分显示：优树质量性状的得分大于５２，优树的高径生长应大于优势木１０％和１５％以上，大于林分平均生长量的１５％和３０％以上。A total of ten potential Plus-trees have been primarily classified in 20 hm2 of 5to 8-year plantation of Acacia auriculiformis in Jianfengling and Qionghai, Hainan Island,based on field-survey carried out in 1992 and 1993.The main indices recorded in survey in-cluded height and diameter in breast height growth, stem-form,crown broadth,health condi-tionand some features else of plus-tree。 The obtained data were processed in STAT and ana-lyzed with method of PCA , DA and MS in order to justify which factor would play more im-portant role in plus-tree selection。 The result demonstrated that growth difference amongplus-trees,the dominants and single tree of each kind would exist in some content to a signif-icant level,and that those factors concerned growth and stem-form of tree were of minor im-portance。As for primary criteria for further selection, overall scores of plus-tree should ex-ceed 52,and its H & DBH growth should be 10%～15%larger than those of the dominantand 15%～30%larger than those of the forest。

关 键 词：直干型 大叶相思 相思树属 选择 综合评分 

分 类 号：Q949.751.9[生物学—植物学]