南洋楹无性系造林初期生长表现及选择

Early Growth Performance and Selection of Paraserianthes falcataria Clones

在广东省博罗县开展了14个南洋楹优树组培无性系造林测定试验,对比分析其早期生长情况及适应性,筛选出速生稳定性较好的无性系。结果表明:测定林0.5年和1.5年生时的成活率分别为94.3%和84.2%;不同无性系的生长和形质性状存在极显著差异(P<0.01);1.5年生平均树高5.83 m、胸径6.67 cm、材积0.011 7 m3,3个生长性状的无性系重复力达到0.7以上;初步筛选出无性系161、160、176、171、238,平均保存率为88.00%,与对照(CK)相比较,可获得材积选择增益为28.18%~68.18%。

14 Paraserianthes clones were tested in Boluo, Guangdong. The study of early growth showed that the survival rates were 94. 3% and 94.2% respectively when the test stand was O. 5-year-old and 1.5-year-old. There were significant differences in growth and quality traits among the 14 clones （P 〈 0. 01 ） ; the mean height, DBH, and individual tree volume were 5.83 m, 6.67 cm and 0. 011 7 m3 at age 1.5, the repeatability of the 3 growth traits reached more than 0.7; primary clones included 161, 160, 176, 171, 238, the average survival rate of which reached 88.00%, and they could obtain volume real gain of 28.18%-68.18% compared with control.