绿化树种长白松枝条分布规律研究

Research on the Branch Distribution Laws of the Pinus sylvestris var.sylvestriformis in Greening

以白城市3个样点30株长白松幼树调查数据作为依据,探究树冠和分枝的基本结构。结果表明:树冠的一级枝条和二级枝条数量均与树龄呈负相关;一级枝条数为2~5个,水平分布符合均匀分布规律;分布在1~2轮枝层的二级枝条数量最多,数量随轮枝数增加显著降低,水平分布符合均匀分布规律。

Based on the survey data of 30 Pinus sylvestris var.sylvestriformis saplings from 3 sampling sites in Baicheng City,the basic structures of the crown and the branches were studied.The results showed that the numbers of primary branches and secondary branches of the crown had the negative relation with the tree age.The number of primary branches was 2 to 5 and the horizontal distribution of primary branches conformed to the uniform distribution.The number of secondary branches was the most in the 1~2 layers of round branches and it significantly reduced with the increasing of the number of round branches,the horizontal distribution of secondary branches conformed to the uniform distribution.