两种桉树混交造林试验初报

陈健波, 陈掁华, 卢翠香, 张磊, 雷仕锐, 刘媛, 王建忠, 邓紫宇. 两种桉树混交造林试验初报[J]. 桉树科技, 2022, 39(3): 35-39. doi: 10.13987/j.cnki.askj.2022.03.006

CHEN Jian-bo, CHEN Cheng-hua, LU Cui-xiang, ZHANG Lei, LEI Shi-rui, LIU Yuan, WANG Jian-zhong, DENG Zi-yu. Preliminary Study on Mixed Afforestation of Two Eucalyptus Species[J]. Eucalypt Science & Technology, 2022, 39(3): 35-39. doi: 10.13987/j.cnki.askj.2022.03.006

Citation:CHEN Jian-bo, CHEN Cheng-hua, LU Cui-xiang, ZHANG Lei, LEI Shi-rui, LIU Yuan, WANG Jian-zhong, DENG Zi-yu. Preliminary Study on Mixed Afforestation of Two Eucalyptus Species[J]. Eucalypt Science & Technology, 2022, 39(3): 35-39. doi: 10.13987/j.cnki.askj.2022.03.006

两种桉树混交造林试验初报

1. 广西林业科学研究院/国家林业局中南速生材繁育实验室/广西优良用材林资源培育重点实验室;

2. 广西国有派阳山林场;

3. 广西国有东门林场;

4. 广西横州市石塘林场

详细信息

作者简介:

陈健波(1964—),男,教授级高级工程师,主要从事森林培育研究。E-mail:cjbgfri@163.com

中图分类号:S792.39;S725.2

Preliminary Study on Mixed Afforestation of Two Eucalyptus Species

1. Guangxi Forestry Research Institute, Key Laboratory of Central South Fast-growing Timber Cultivation of State Forestry Administration of China, Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation;

2. Guangxi State-owned Paiyangshan Forest Farm;

3. Guangxi State-owned Dongmen Forest Farm;

4. Guangxi Hengzhou Shitang Forest Farm

摘要

摘要:大花序桉为优质锯材树种,宜作长周期大径级锯材人工林培育;尾巨桉为优良纸浆纤维等工业用材树种,适合作中短周期中小径材人工林培育,两种桉树培育目标、方式不同,任一树种纯林经营均各有优、缺点。为使2种桉树培育达到优劣互补的目的,促进桉树人工林可持续经营,探索这2种桉树进行混交栽培具有重要意义。试验设5行大花序桉+5行尾巨桉、2行大花序桉+5行尾巨桉的混交处理及2个树种的纯林为对照共4个处理,在试验林3.5年生时调查各处理林木胸径、树高生长量。通过对试验各处理的单株林木、林分生长量进行分析,结果表明:混交处理的大花序桉、尾巨桉林木平均胸径、树高、单株材积均与其纯林处理的林木间无显著差异,在与尾巨桉林木2~10 m距离范围内的大花序桉林木间的平均胸径、树高、单株材积差异不显著;4个试验处理蓄积量从大到小的排序为:尾巨桉纯林>2行大花序桉+5行尾巨桉>5行大花序桉+5行尾巨桉>大花序桉,且各试验处理间均达显著差异水平。初步认为,大花序桉与尾巨桉混交栽培对彼此单株林木生长没有明显影响,但混交林蓄积量随尾巨桉混交占比的增大而增加。由于试验时间尚短,最终结果有待后续跟踪调查。

关键词:大花序桉 / 尾巨桉 / 长周期 / 短周期 / 混交林

Abstract:Eucalyptus cloeziana is an excellent sawn timber species well suited for use in cultivating large-diameter timber, while E. urophylla × grandis is an excellent pulp and fiber timber species, suitable for cultivating medium and small-diameter timber. Thus, the cultivation objectives and optimum silviculture for cultivation of each of these two species can be quite different. Yet, cultivation of mixed species plantations can realize the complementation of such tree species and promote the sustainable management of Eucalyptus plantations. In this study mixed plantations involving two different proportions of these species were set up involving: i) 5 rows of E. cloeziana + 5 rows of E. urophylla × grandis; ii) 2 rows of E. cloeziana + 5 rows of E. urophylla× E. grandis; iii) & iv) pure species plantation of each species used as the controls. After 3.5 years of afforestation, the growth indices of the two tree species in the trial were investigated.Resultsshowed that the average tree height, diameter at breast height and individual tree volume of E. cloeziana trees were not significantly different among treatments and similarly for E. urophylla × grandis. With the increase of planting distance from E. urophylla × grandis, the average tree height, diameter at breast height and individual tree volume of E. cloeziana were not significantly different. Stand volumes differed significantly among the experimental treatments; ranked from large to small these were: pure E. urophylla × grandis > 2 rows of E. cloeziana + 5 rows of E. urophylla ×. grandis > 5 rows of E. cloeziana + 5 rows of E. urophylla × grandis > pure E. cloeziana. In the construction of mixed plantations of E. cloeziana and E. urophylla × grandis, the interactions between the different species in the early years of growth was not obvious, and stand volumes increased as the proportion of E. urophylla × grandis in the mixture increased. It is concluded that more scientific data is needed from following up this and other studies over the long-term.

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