四川盆地香椿生长规律初步研究

采集了3株四川盆地不同地区的自然生长的香椿,通过树干解析分析,研究其生长规律。结果表明,香椿在前8 a生长期内材积生长较慢,但胸径和树高生长较快;在随后的9 a到20 a生长期内,胸径和树高生长量最大,且较为稳定,材积生长迅速。其中5 a～10 a是树高生长的速生期,5 a～20 a是胸径生长的速生期;在20 a之后的生长期,虽然材积仍在增长,但渐趋缓慢。本文还建立了香椿树胸径、树高和材积总生长量的回归模型,可为香椿木材定向培育技术及经营管理和香椿造林提供一定的理论依据。

A Preliminary Study of the Growth Law of Toona sinensis in the Sichuan Basin

In this paper,researches were conducted on the growth regularity of Toona sinensis through stem analysis of its trunks collected from the natural environment of the Sichuan Basin.In the first eight years of Toona sinensis＇s growth period,its volume grew slowly,but its DBH and tree height grew quickly;During the succeeding 9 to 20 years,the growth of its DBH and height was the fastest and relatively stable,and its volume also grew quickly.From 5 to 10 years was the fast-growing period of tree height,while from 5 to 20 years was the fast-growing period of DBH.After 20 years of growth,although volume still grew,but gradually slowed down.The regression model was also established among the growth of height,DBH and volume,which could supply a certain theoretical support for the directive cultivation technology,management and forestation of Toona sinensis.