降香黄檀中幼林树冠生物量研究  

Canopy Biomass of Young and Middle-age Dalbergia odorifera Forest

作　　者：余慧霖 刘慧兰 张学丰 张建龙 陈佳欣 陈毅青 杨怀 YU Huilin;LIU Huilan;ZHANG Xuefeng;ZHANG Jianlong;CHEN Jiaxin;CHEN Yiqing;YANG Huai(School of Tropical Agriculture and Forestry,Hainan University,Haikou,Hainan 570228,China;Hainan Academy of Forestry(Hainan Academy of Mangrove),Haikou,Hainan 571199,China;Research Base of Sanya,International Bamboo and Rattan Center,Sanya,Hainan 572000,China)

机构地区：[1]海南大学热带农林学院,海南海口570228 [2]海南省林业科学研究院(海南红树林研究院),海南海口571199 [3]国际竹藤中心三亚研究基地,海南三亚572000

出　　处：《热带作物学报》2025年第1期162-170,共9页Chinese Journal of Tropical Crops

基　　金：海南省重点研发专项“揭榜挂帅”项目(No.ZDYF2023SHFZ174);海南省重大科技计划项目(No.ZDKJ2021031)。

摘　　要：研究降香黄檀(Dalbergia odorifera T.Chen)人工林树冠生物量的分布特征,可以为合理的评估林分生物量和调整树冠结构提供理论依据。本研究以海南东方市林龄为10~12 a的降香黄檀人工林为研究对象,设置2种不同立地条件样地(S_(1)和S_(2)),对4.5 m以上样木截冠处理,采用分层切割法和全量称重法获取树冠层各器官生物量,建立各器官最优生物量拟合方程。结果表明:(1)冠层各器官中生物量大小顺序为裸枝>枝皮>叶片;裸枝、枝皮和冠层总生物量为S_(1)>S_(2),叶片生物量则为S_(1)<S_(2)。(2)随着冠层层次的增高,S_(1)和S_(2)裸枝和枝皮生物量均呈波浪形变化,其中S_(1)表现为先增加再下降,而S_(2)则与之相反;叶片生物量整体呈先上升再下降的趋势,其中S_(1)集中分布在树冠中上层,S_(2)主要分布在下层。S_(1)较S_(2)树冠上层生长竞争更激烈,已出现冠层严重的自然稀疏,叶生物量逐渐由下层转移至中上层。(3)生物量最优拟合模型为幂函数形式,分别为树冠总生物量[y=3.904(D^(2)H)^(1.247)]、冠裸枝[y=1.901(D2H)^(1.28)]、冠枝皮[y=0.734(D2H)^(1.276)]、叶片(y=3.86D^(2.791))。The study of the distribution characteristics of crown biomass of Dalbergia odorifera plantation can provide theoretical basis for reasonable evaluation of stand biomass and adjustment of crown structure.In this paper,D.odorif-era plantation aged 10-12 a in Dongfang,Hainan,China was taken as the research object.Two sample plots(S_(1) and S_(2))with different site conditions were set up,and the crown of the sample trees over 4.5 m was cut off.The biomass of each organ in the canopy was obtained by layered cutting method and total weighing method,and the optimal biomass fitting equation of each organ was established.(1)The order of biomass in each organ was bare branch>branch bark>leaf.The total biomass of bare branches,branch bark and canopy was S_(1)>S_(2),while the leaf biomass was S_(1)<S_(2).(2)With the in-crease of canopy class,the biomass of bare branches and branch bark of S_(1) and S_(2) showed a wave-like change,in which S_(1) increased first and then decreased,while S_(2) was the opposite.As a whole,the leaf biomass increased first and then decreased,in which S_(1) was mainly distributed in the middle and upper layers of the crown,while S_(2) was mainly distrib-uted in the lower layers.The upper layer of the canopy of S_(1) was more competitive than that of S_(2),there has been seri-ous natural thinning of canopy,the leaf biomass gradually shifted from the lower layer to the middle and upper layers.(3)The optimal fitting model of biomass was power function,which was the total biomass of crown[y=3.904(D^(2)H)^(1.247)],canopy bare branches[y=1.901(D^(2)H)^(1.28)],canopy branch bark[y=0.734(D^(2)H)^(1.276)],and canopy leaves(y=3.86D^(2.791)).

关 键 词：降香黄檀 树冠 生物量 分布特征 拟合方程 

分 类 号：S792.28[农业科学—林木遗传育种]