两个林龄15个桉树无性系生长比较

Growth Comparison of Fifteen Eucalyptus Clones at Two Ages

对福建长泰岩溪林场两个林龄的15个桉树无性系进行调查分析,结果表明:5 a、15 a时,各无性系树高、胸径、单株材积、公顷蓄积差异极显著。5 a时W7、DH32-27、EC1、DH32-22、209X等为高产无性系;15 a时EC1、DH32-27、209X、W7、岩97、DH32-22、LH3、LH1为高产无性系。W5、LPT、LH22、W6等无性系生长缓慢,可能不适应闽南山地环境。选择这些适应闽南山地环境的优良无性系与DH32-29等进行混系造林或嵌合造林,有利于增加桉树速丰林的遗传基因多样性。

Fifteen Eucalyptus clones were assessed for growth at ages 5 and then 15 years in a trial at Changtai Yanxi State-owned Forest Farm. Significant differences were found among the clones at both ages for tree height, DBH, individual volume, growing stock per hectare. At age 5 years, clones W7, DH32-27, EC1, DH32-22 and 209X had the highest yields. At age 15 years clones EC1 DH32-27, 209X, WT, Rock97, DH32-22, LH3 and LH1 were the highest yielding ones. Meanwhile, clones Ws, LPT, LH22, W6 and a number of others grew slowly and are not as well adapted to environment of southern Fujian mountains. Crossing the superior clones, which are adapted to southern Fujian, with DH32-29 to make mixed plantations or chimeric afforestation would help increase the genetic diversity of future Eucalyptus plantations.