The average tree volume,height and diameter of 6 superior families were above 0.033 339 m3,11.31 cm,6.62 m respectively which had average genetic gains above 30%,9%,11%. These superior families could be used for seed orchard and vegetative propagation.

• 调查数据经过统计分析；从参试的家系中选出6个优良家系；其材积、胸径、树高平均值分别达到0.；033 339m3、11