6年生桉树无性系的生长和材性研究

Study on Growth and Wood Property of 6-year-old Eucalypt Clones

对6年生的13个桉树无性系试验林的生长性状、生长特性和11个无性系的材性性状进行研究,结果表明:无性系间生长性状存在极显著差异,广林4的平均胸径最大而广林9的平均树高最高,分别达到13.4 cm和20.5 m,单株材积以广林4、广林9、DH32-22、LH5和EC34为前5位,即尾巨桉和尾细桉生长量较大;广林4、U7和广林9的Pilodyn值较大,均大于13 mm,EC34、LH1和LH5居中均大于12 mm,证实Pilodyn值与基本密度存在极显著负相关关系(P<0.01),Pilodyn值与木材生长量表现为极显著正相关,木材密度越大则材积越小;无性系间生长应变值无显著性差异,DH201-2应变值最大(1523);弹性模量与木材密度表现为显著正相关(P<0.05),Pilodyn值越大弹性模量越小;11个桉树无性系的实木利用价值排名顺序为:广林4>广林9>DH32-22>LH5>EC34>LH1>M1>DH201-2>UC184-1>柳桉1>SH7。

Study on growth traits and features of 13 eucalypt clones and wood properties 11 clones were carried out at the age of 6-year-old.The results showed that there were extra significant differences in growth traits between clones,average DBH of Gl4(13.4 cm)and average HT of GL9(20.5 m) was the highest in the tested clones respectively.Volume decreasing order of the first five individual trees was GL4>GL9>DH32-22>LH5>EC34,indicating growth of E.urophylla×E.grandis and E.urophylla×E.tereticornis were...