南宁树木园伐区桉树萌芽林调查分析  

Investigation and Analysis of Eucalyptus Sprouting Forest in Cutting Area of Nanning Arboretu

作　　者：何荣 梁腾程 何俊俞 李昌荣[2] 刘媛[2] 唐庆兰[2] 卢翠香[2] 邓紫宇[2] 陈健波[2] HE Rong;LIANG Tengcheng;HE Junyu;LI Changrong;LIU Yuan;TANG Qinglan;LU Cuixiang;DENG Ziyu;CHEN Jianbo(Nanning Arboretum of Guangxi Zhuang Autonomous Region,Nanning 530031,Guangxi,China;Guangxi Zhuang Autonomous Region Forestry Research Institute/Key Laboratory of Central South Fast-growing Timber Cultivation of National Forestry and Grassland Administration/Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation,Nanning 530002,Guangxi,China)

机构地区：[1]广西壮族自治区南宁树木园,广西南宁530031 [2]广西壮族自治区林业科学研究院/国家林草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,广西南宁530002

出　　处：《桉树科技》2024年第4期48-54,共7页Eucalypt Science & Technology

基　　金：广西科技厅广西科技重大专项项目(桂科AA23062055)。

摘　　要：对2021—2023年南宁树木园伐区桉树萌芽林的调查数据进行方差分析和聚类分析,为桉树萌芽林经营管理提供参考。结果表明:同龄组在不同地点间,林分单位面积的产材量、林木数量及单株产材量均有显著差异。龄组Ⅰ(4 a≤林龄<6 a)中,单位面积产材量最高的是田东县(179.25 m^(3)·hm^(-2));龄组Ⅱ(6 a≤林龄<8 a)中,单位面积产材量较高的是苍梧县(183.00 m^(3)·hm^(-2))和隆安县(187.95 m^(3)·hm^(-2));龄组Ⅲ(8 a≤林龄<10 a)中,单位面积产材量最高的是横州市(242.05 m^(3)·hm^(-2))。不同龄组间的单位面积产材量、单株产材量均随龄组增大而增大,龄组Ⅱ、Ⅲ的单位面积产材量和单株产材量均极显著高于龄组Ⅰ;年均单位面积产材量随龄组增大而减小,各龄组间存在极显著差异;各龄组间的单位面积林木数量差异不显著。南宁树木园的单位面积产材量总体不高,需根据立地条件制定合理的抚育经营措施,并加强管理以提高产量。萌芽林适宜密度为1200~1600株·hm^(-2),合适的采伐林龄为6~8 a。The survey data of Eucalyptus sprouting forest in Nanning Arboretum cutting area from 2021 to 2023 were analyzed by variance analysis and cluster analysis to provide reference for the management of Eucalyptus sprouting forest.The results showed significant differences in timber yield per unit area,tree density,and timber yield per tree among different locations within the same age group.In age group Ⅰ(4 years≤stand age<6 years),had the highest timber yield per unit area(179.25 m^(3)·hm^(-2)).In age group Ⅱ(6 years≤stand age<8 years),Cangwu County(183.00 m^(3)·hm^(-2))and Long'an County(187.95 m^(3)·hm^(-2))had the higher timber yield per unit area.In age group Ⅲ(8 years≤stand age<10 years),Hengzhou City had the highest timber yield per unit area(242.05 m^(3)·hm^(-2)).Timber yield per unit area and timber yield per tree increased with age group,with age groups Ⅱ and Ⅲ showing significantly higher timber yields per unit area and per tree compared to age group Ⅰ.The average annual timber yield per unit area decreased with age group,and there were significant differences among all age groups.However,there were no significant differences in tree density per unit area across the age groups.Overall,the timber yield per unit area in Nanning Arboretum is relatively low,and it is necessary to formulate reasonable management measures according to site conditions and strengthen management to increase yield.The suitable density of sprouting forest was 1200~1600 plants·hm^(‒2),and the suitable cutting age was 6~8 years.

关 键 词：尾巨桉 萌芽林 伐区 龄组 产材量 

分 类 号：S725.7[农业科学—林木遗传育种]