青海云杉无性系种子园球花的分布规律研究

目的]研究青海云杉无性系种子园雌雄球花的花芽分布与花量。方法]以张掖市龙渠国家青海云杉无性系种子园为试验对象,对15个无性系的花量及球花分布进行调查。结果]青海云杉89.95%的雄球花主要着生在树冠中下部的内膛枝条上,雌球花着生在树冠中上部的外围枝条上;而80.54%的雌球花主要着生在树冠中上部的外围枝条上;85%的雄球花着生在2年生和3年生的枝条上,1年生、5~6年生枝条上几乎没有,在多年生Ⅰ级侧枝上有雌雄球花发出,但数量极少。80%的雌球花着生在3、4年生的枝条上,1年生枝条上没有,2年生、5~6年生枝条上的雌球花比例小于10%;试验所选取的15个青海云杉无性系雌雄球花以85#最多。结论]青海云杉不同的无性系之间雌雄球花量显著差异,雌雄球花在树冠中的分布存在分层现象,花芽有很长的潜伏期。

Distribution Law of Conei n Clonal Seed Orchard of Picea crassifolia

Objective] To research the flower bud distribution and flower quantity of male and female cones in clonal seed orchard of Picea crassifolia.Method] With the Longqu clonal seed orchard of Picea crassifolia in Zhangye as the study objects, we investigated the distribution of cone distribution and cone flower quantity of 15 clones.Result] 89.95%male cone of Picea crassiflo ia mainly born in bore branches in the canopy of the part, the female cone in the periphery of the upper branches in the canopy;while 80.54%female cone mainly grew in the cano-py of the periphery of the upper branches .85% male cone grew in 2 years and 3 years old branches, there were few in 1 year, 5-6years branches.Male and female cones appeared on perennial Ⅰcollateral branches, but the quality was few.80% of the female cone born in the 3, 4 years old branches, but there were no cone in 1 year old branches.2 years, 5 -6years old branches of the female cone ratio was less than 10%.Among the 15 clone male and female cones of Picea crassifolia, 85# was most. Conclusion] There is not significant differences between different clone of male and female cones.The male and female cones of Picea crassifolia are distributed in different layers in the crown.And the flower bud of Pieca crassifolia has a long incubation period.