杉木无性系测定林分析及速生无性系选择

Cunninghamia lanceolata Clone Test Plantation Analysis and Fast-Growing Clone Selection

对福建省洋口国有林场1994年营建的杉木无性系测定林的生长性状进行调查分析,结果表明:无性系16年生时平均树高、胸径、单株材积分别为13.19 m、14.59 cm、0.1339 m3;无性系树高、胸径、材积重复力达0.6873以上,生长性状受到中等强度的遗传控制。以16年生时材积为指标选出4个速生无性系,平均树高、胸径、单株立木材积分别为14.30 m、16.30 cm、0.17696 m3,遗传增益均值分别为13.03%、12.26%、33.26%。

This paper studied the growth of Cunninghamia lanceolata clone test plantation which was established on Yangkou National Forest Farm in 1994.The results showed that the average tree height,DBH and volume were 13.19 m,14.59 cm and 0.1339 m3 when the plantation was 16 years old.The repeatability of clone tree height,DBH and volume were more than 0.6873,so clone's growth was mainly controlled by middling intensity of genetic factor.4 fast-growing clones were selected based on 16-year-old volume.The average tree height,DBH and volume of the 4 clones were 14.30m,16.30cm and 0.17696 m3 respectively,and volume genetic gains of the 4 clones were 33.26%.