【摘要】 在12年生大叶山杨人工中龄林中选择标准木,采用树干解析的方法对大叶山杨树高、胸径及材积生长过程进行了分析。研究表明:大叶山杨树高、胸径曲线是时间的增函数,即树高、胸径随生长年限的增加而增加,在树高生长方面表现出早期速生的生长规律,材积生长表现为最初几年生长较慢,5a后材积生长加快,曲线上没有出现拐点,速生高蜂时期还未到来。更多还原

【Abstract】 Twelve-year-old adult Populus davidiana var.macrophylla were selected.Tree height,DBH&growth of volume were analyzed by tree trunk analysis.Result shows that the tree height and DBH curve of Populus davidiana are increasing function of time.In other words,the tree height and DBH increase monotonically with the increase of the growth period.In the growth of the tree,it showed early and fast growth.The growth of volume showed slow growth in the first few years,rapid growth of volume after 5 a,no inflection point appeared on the curve,and the peak period of growth has not yet arrived.更多还原