構樹天然林生長規律研究

顏慧萍 高正龍 陳譚星 曹力凡 孟慶法 閆靈敏 呂文竹 王品勝

摘要 [目的]探究構樹天然林生長規律，為野生構樹的進一步開發利用提供科學依據。[方法]采用樹干解析法對河南伏牛山構樹（ Broussonetia papyrifera） 天然林生長規律進行研究。[結果]16年生野生構樹的胸徑、樹高與材積總生長量分別為19.55 cm、10.2 m與0.144 14 m3;其年均增長量分別為1.222 cm、0.638 m與0.009 01 m3;胸徑連年生長量和年均生長量均在6年時達到最大值，兩者在6～9年生相交，此時為胸徑數量成熟齡;樹高連年生長量與年均生長量均在3年生時達到最大值，兩者在6～9年生間相交，此時為樹高數量成熟齡;材積連年生長量在15年生時達到最大值，材積生長率在12年生時開始穩定，胸高形數在10年時基本穩定。早期構樹高生長速度快，胸徑增長量大，易于成林;天然林材積的增長量明顯，并隨樹齡的增加呈現規律的遞增趨勢。[結論]構樹可作為木本飼用植物推廣栽培。

關鍵詞 構樹;天然林;生長規律;樹干解析

中圖分類號 S 792.99? 文獻標識碼 A

文章編號 0517-6611（2021）19-0102-03

doi：10.3969/j.issn.0517-6611.2021.19.025

開放科學（資源服務）標識碼（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