摘要
迎春5号杨是牡丹江林区1982年从中国林科院引进的黑小杨混合系中选育出的优良无性系。该品种具有生长迅速、材质优良、抗性强等优良特性。15年生林分平均胸径达301cm、平均树高达201m、单株材积05149m3,显著超过了小黑杨等参试品种。根据树冠面积与胸径相关关系选择数学模型进行拟合,得到y=a+bx+cx2+dx3为最佳模型,以此编制迎春5号杨经营密度表。
Yingchun poplar 5 is a fine clone cultivated from mixed strains of Heixiao poplar introduced from the Chinese Academy of Forestry in Mudanjiang Forestry Area in 1982. This strain is of several fine characters such as fast-growing, fine wood quality and high resistance etc. The mean breast-height diameter, mean tree height and individual volume of 15-year-old stands are 30.1 cm, 20.1 m and 0.514 9 m 3 respectively, exceeding that of Lesser Black poplar significantly. According to the correlation relationship between crown area and breast-height diameter, the most suitable mathematical model was obtained: y=a+bx+cx 2 +dx 3 , with which management density table of Yingchun poplar 5 was made.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
1998年第6期24-27,共4页
Journal of Northeast Forestry University
关键词
迎春5号杨
生长评价
经营密度
Yingchun poplar 5
Evaluation of growth
Management density