木材材性株内径向变异模式研究初探V.15个欧美杨无性系木材纤维长度的径向变异模式的研究  

A PRIMARY STUDY ON THE RADIAL VARIATION PATTERNS OF WOOD PROPERTIES WITHIN TREES V.THE RADIAL VARIATION PATTERNS AND ITS VARIATION OF WOOD FIBRE LENGTH OF 15 CLONES

作　　者：姜笑梅[1] 许明坤[1] 黄东森[2] 

机构地区：[1]中国林业科学研究院木材工业研究所 [2]中国林业科学研究院林业研究所

出　　处：《林业科学》1997年第2期168-175,共8页Scientia Silvae Sinicae

基　　金：林业部世界银行贷款国家造林项目

摘　　要：１５个欧美杨无性系木材纤维长度的株内变异模式大致相似，但各无性系间以至无性系内株间仍有差异。纤维长度变异模式的数字特征在无性系间有显著差异，表明纤维长度在无性系间选择有潜力，选择不仅可在纤维长度的平均水平上，而且也可在变异模式上进行。用聚类方法，将１５个无性系的纤维长度径向变异模式分为３组，并可用数学公式Ｙ＝Ｃ１＋Ｃ２×Ｘ２＋Ｃ３ｅｘｐ（－Ｃ４×Ｘ１）表达。不同无性系系变异曲线虽有交叉，但年－年相关显著。The radial variation patterns of wood fibre length of 15 clones of Populus×euramercana were geneerally the same.But there existed a certain degree of interclonal and intraclonal variation.Average fibre length at various ages and the parameters related to variation patterns as well varied significantly among clones.This encourages the improvement of both the average level of fibre length and its variation patterns by selection and breeding.The radial variation patterns of fibre length of 15 clones were divided into three groups by classical analysis and expressed using the methematical model Y=C 1+C 2×X 2+C 3exp(-C 4×X 1).There existed intersection between fibre length profiles of different clones,but the age-age correlation were significant,indicating that the early-selection among clones is feasible.

关 键 词：纤维长度 径向变异模式 木材 

分 类 号：S781[农业科学—木材科学与技术]