丽江云杉优良家系选择

Selection of superior excellent families of Picea likiangensis

以引自甘肃省小陇山林业科学研究所的15个丽江云杉家系3年生苗为材料,于国有樟村坪林场造林,观测各家系的成活率、保存率、树高、当年新梢长、地径、南北平均冠幅和一级分枝数,并对家系间6个生长性状指标进行分析。结果表明:7年生时,15个丽江云杉家系间保存率和新稍长的差异均不显著,树高和冠幅的差异均达极显著,地径和一级分枝数的差异均达显著。综合选择出的3个优良家系7年生平均树高比其它12个家系的平均树高提高16.5%,当年新稍长提高10.9%,地径提高4.6%,冠幅提高10.9%,保存率提高3.4%。

Taking the experiment material of three-year Picea likiangensis of 15 families at State-owned Forest Farm of Zhangcunping which introduced from Xiaolongshan Forestry Institute of Gansu Province. The six growth character indexes between genealogy is analyzed as following： observation of survival rate and survival rate of system,conducted to study the tree height,the length of new shoot,the number of first order lateral branches,the bud number of leading shoot,the north-south crown width and the preserving rate of total length of top wheel lateral branch. The results showed that the differences of survival rate between family and the new longer of 15 P. likiangensis in 7 year-old weren＇t significant,and the tree height and crown width differences were very significantly,and the difference of ground diameter and the number of primary branches have significant. Comprehensive selection of three fine family of 7 year-old P. likiangensis are increased 16. 5% ratio than the average tree height increased of 12 others,and the length of new shoot,ground diameter,crown width and survival rateincreased 10. 9%,4. 6%,10. 9% and 3. 4%,inspectively.