太原市华北落叶松人工林生长研究

Study on Growth Process of Larix principis-rupprechtii in Taiyuan City

以太原市华北落叶松人工林为研究对象,利用树干解析对其生长动态进行了研究,分析了华北落叶松的生长过程。结果表明,华北落叶松胸径的连年生长量在第15年达到最大值,连年生长量曲线与平均生长量曲线在第18年相交;树高连年生长量在第15年达到最大值,连年生长量曲线与平均生长量曲线在第22年相交。材积在15~25年时连年生长量快速增长,25年时连年生长量达到了最大值,之后逐渐减缓,直到第34年,材积的连年生长量曲线与平均生长量曲线没有相交,说明太原市的华北落叶松林分还没有达到成熟期,正处于生长期。

In this paper,the tree trunk analysis was used to study the growth dynamics of Larix principis-rupprechtii in Taiyuan City,and the growth process of Larix principis-rupprechtii was analyzed.The results showed that the annual growth amount of DBH reached the maximum at 15 a and growth curve intersected with the average growth curve at 18 a.The highest growth rate of the tree height reached the maximum at 15 a,the growth curve of height and the average growth curve intersected at 22 a.The annual growth rate of volume showed a rapid growth from 15 a to 25 a and gradually slowed down from 25 a,the annual growth curve of Larix principis-rupprechtii did not intersect with the average growth curve until 34 a,which indicated that the forest of Larix principis-rupprechtii in Tianyuan City had not reached the mature stage,but was in the growth period.