闽楠优树子代测定林优良家系和单株初步选择

Selection of Superior Family and Individual of Plus Tree Progeny of Phoebe bournei

通过林分调查,对11 a林龄41个家系闽楠优树子代测定林的树高、胸径、冠幅生长和通直度、分枝度指数进行测定,结果表明:不同家系树高5.55~8.90 m,胸径6.92~11.91 cm,单株材积0.014671~0.050397 m^3,差异均达到极显著水平,树高遗传力0.8725,胸径遗传力0.7917,单株材积遗传力0.8557;通直度指数3.04~4.86,差异达到0.1显著水平;冠幅2.15~2.81 m、分枝度指数3.14~3.90,差异均未达到显著水平。以单株材积生长为依据,选出8个速生优良家系,其树高8.22~8.90 m,遗传增益7.62%~15.46%;胸径10.86~11.91 cm,遗传增益11.62%~20.40%;单株材积0.041936~0.050397 m^3,遗传增益32.20%~55.97%,相比6 a林龄选出的9个优良家系重复入选3个,8 a林龄选出的8个优良家系重复入选6个;选出30个速生优良单株,其树高8.3~11.0 m,遗传增益4.22%~19.62%;胸径12.0~16.3 cm,遗传增益19.28%~52.06%;单株材积0.059388~0.111401 m^3,遗传增益53.40%~150.05%;相比6 a林龄选出的30个优良单株重复入选14个。