The best clone is TZ-8,following by TZ-5 and TZ6.The individual wood volume of these 3 clones at 7a old were 0.609 3 m~3,0.532 9 m~3 and 0.514 9 m~3,resp. Comparing with the control,the realistic gain of these traits were 264%,231% and 223%,resp.

• 表现最好的无性系是TZ-8、次是TZ-5和TZ-6；7年生平均材积分别为0.；6093、0