构树天然林生长规律研究

颜慧萍 高正龙 陈谭星 曹力凡 孟庆法 闫灵敏 吕文竹 王品胜

摘要 [目的]探究构树天然林生长规律，为野生构树的进一步开发利用提供科学依据。[方法]采用树干解析法对河南伏牛山构树（ Broussonetia papyrifera） 天然林生长规律进行研究。[结果]16年生野生构树的胸径、树高与材积总生长量分别为19.55 cm、10.2 m与0.144 14 m3;其年均增长量分别为1.222 cm、0.638 m与0.009 01 m3;胸径连年生长量和年均生长量均在6年时达到最大值，两者在6～9年生相交，此时为胸径数量成熟龄;树高连年生长量与年均生长量均在3年生时达到最大值，两者在6～9年生间相交，此时为树高数量成熟龄;材积连年生长量在15年生时达到最大值，材积生长率在12年生时开始稳定，胸高形数在10年时基本稳定。早期构树高生长速度快，胸径增长量大，易于成林;天然林材积的增长量明显，并随树龄的增加呈现规律的递增趋势。[结论]构树可作為木本饲用植物推广栽培。

关键词 构树;天然林;生长规律;树干解析

中图分类号 S 792.99  文献标识码 A

文章编号 0517-6611（2021）19-0102-03

doi：10.3969/j.issn.0517-6611.2021.19.025

开放科学（资源服务）标识码（OSID）：

Study on the Growth Rhythm of the Natural  Broussonetia papyrifera  Forest

YAN Hui-ping，GAO Zheng-long，CHEN Tan-xing et al

（Henan High Tech Industrial Co.，Ltd.，Zhengzhou，Henan 450000）

Abstract [Objective] To explore the growth law of  Broussonetia papyrifera  natural forest and provide scientific basis for the further development and utilization of wild  Broussonetia papyrifera. [Method] The research was conducted on the growth characteristics of the natural  Broussonetia papyrifera  forest growing at Funiu Mountain Forest Henan Province by using stem analysis method.[Result] The results showed that the DBH，tree height and tree volume growth of the 16-year-old  Broussonetia papyrifera  were 19.55 cm，10.2 m and 0.144 14 m3.Their mean annual increments were 1.222 cm，0.638 m and 0.009 01 m3.The current annual increment of DBH reached maximum at the age of 6 while the mean annual increment was at the age of 6.They intersected at about 6-9 years old，which meant that the DBH growth process had reached its quantitative at the age of 6-9.The current annual increment and mean annual increment of tree height reached maximum at 3 years old.The quantitative mature age of tree height was 6-9.The current annual increment of timber volume reached maximum at 15 years old.The volume increment percent began to become stable at 12 years old.The tree form was basically steady at about 10 years old.Natural forest of  Broussonetia papyrifera  was easy to form the forest with tree height growing rapidly in the preliminary stage，and big diameter at breast height growth.Natural forest volume significantly increased，and presenting regular increasing trend with the increase of tree age.[Conclusion] Broussonetia papyrifera  could be used as woody forage plants to promote the cultivation.

Key words  Broussonetia papyrifera; Natural forest;Growth rhythm;Stem analysis