蒙古栎无性系种子园花量变异及空间分布

Flower Quantity Variation and Spatial Distribution of Clones in Quercus mongolica Seed Orchard

以吉林森工临江林业有限公司金山林场蒙古栎无性系种子园植株为对象,调查分析蒙古栎无性系雌、雄花空间分布规律。结果表明:无性系间单株标准枝数和标准枝小枝数差异达显著水平,无性系间小枝雄花序数、小枝雌花数、雄花序总数、雌花总数差异均达到极显著水平;依据雌、雄花数量将各无性系聚类成多花类群、中间类群和少花类群;蒙古栎种子园内,雌、雄花量上、下冠层间差异均达到显著水平,花量在树冠上、下层间的比为1∶0.27,说明雌、雄花绝大多数都分布在树冠上层;蒙古栎无性系雄花数量在树冠不同方向上(东、西、南、北)的比为1∶0.89∶0.92∶0.72,雌花量为1∶0.83∶0.87∶0.72。

The spatial distribution of female and male flowers of Quercus mongolica was investigated and analyzed in Quercus mongolica clonal seed orchard in Jinshan Forest Farm of Jilin Forest Industry Group Linjiang Forestry Co.,Ltd.The results showed that there was significant difference between the number of standard twigs per plant and the number standard twigs per clone.The number of male inflorescence,the number of female flower,the total number of male inflorescence and the total number of female flower of twig were significantly different among clones.According to the number of female and male flowers,the clones were clustered into multi-flowered groups,intermediate groups and few-flowered groups.In Quercus mongolica seed orchards,the difference between male and female flower in upper and lower canopy was significant.The ratio of flower number to the upper and lower layers of the canopy average was 1∶0.27.It showed that the majority of male and female flower were distributed in the upper canopy.The average ratio of male flower number in different direction of canopy(east,west,south,north)was 1∶0.89∶0.92∶0.72,the average ratio of female flower amount in different direction of canopy was 1∶0.83∶0.87∶0.72.