摘要
调查结果表明，油松无性系花量的变异很大。雌花在冠层外围均有分布，以中层较多，雄花主要分布在下层。花量最多的无性系是最少的倍数：雄花为２２５．８倍，雌花为８．４倍。花量与生长量指标非常密切相关。应用座标法对无性系进行评价，选出优良无性系占调查总数的２６．７％，雄雌花量分别比平均值超过５３．２％和４０．５％。这些调查结果为种子园的经营管理提供了依据。
The investigation results showed that the flower number had greatly difference invarious clones of pinus tabulaeformis.Female flower scatter all around the periphery of crownfrom the upper to the lower,but majority gather around the middle of crown. Male flowergather around the lower of crown,Between, maximum flower number and minimum flowernumber in various clones,female lawer is 8.4 times,male flower is 225.8 times.There is allclosely very correlated between the flower number and growth.The dominants clones wereselected by cordinate method and it's 26.7%。 Female flower and male flower number are 53 .2%and 40.5%higher more the dominants clones than average. The investigation result hasprovided scientific basis for management an administration of seed breeding garden.
基金
国家基金
关键词
种子园
无性系
花量
选择
油松
seed orchard
chone
flower number
selected
