15年生香樟人工林的生物量及生产力  

Biomass and Productivity of 15-year-old Cinnamomum camphora Plantation Forest

作　　者：谭桂菲 安家成[1] 黎贵卿[1] 王军锋[1] 陆敏 吴建文[1] 曾怡嘉 吴际友[2] 

机构地区：[1]广西壮族自治区林业科学研究院国家林业局八角肉桂工程技术研究中心广西木本香料工程技术研究中心,南宁530002 [2]湖南省林业科学院,长沙412006

出　　处：《广西林业科学》2017年第4期369-374,共6页Guangxi Forestry Science

基　　金：广西林业科技项目(桂林科字[2016]第(33)号);"十三五"国家重点研发计划(2016YFD060060050);自治区主席科技资金项目(1517-06)

摘　　要：通过对湖南省黄丰桥国有林场广黄分场15年生香樟(Cinnamomum camphora)人工林进行调查,采用样方收获法对其生物量和生产力进行研究。结果表明:香樟单株生物量随着胸径的增长而增加,不同径阶单株植物的生物量差异明显,其生物量在各器官上分配为干材>根蔸>枝条>叶>干皮>粗根>中根>细根。各器官生物量与测树因子D2H间存在密切关系,拟合的回归模型精度均为0.9以上。香樟乔木层平均生物量为183.19 t/hm^2,分配规律为干材>根蔸>枝条>叶子>干皮>粗根>中根>细根;乔木层地上部分生物量为126.90 t/hm^2,地下部分生物量为56.29 t/hm^2,分别占乔木层生物量的69.27%、30.73%,且地上部分生物量是地下部分生物量的2.3倍。林分的平均生产力为14.00 t/(hm^2·a),表现出较高的生产力;其中乔木层为12.22 t/(hm^2·a),占林分总生产力的87.29%,林下植被层为1.78 t/(hm^2·a),占总生产力的12.71%;林分中生产力在各层中的分配规律大小依次为:乔木层>灌草层>凋落物层,分别占林分总生产力的87.29%、8.79%、3.93%。The biomass and productivity of 15-year-old Cinnamomum camphora, which was planted in Guanghuang branch of Hunan Huangfengqiao state forest farm, were studied by sample harvesting method. The results showed that the individual biomass of Cinnamomum camphora plantation increased with the in- crease of DBH, the difference of individual biomass in different diameter classes was significant. The order of biomass allocation in different organs was trunk〉 root stump〉branch〉leaf〉 bark 〉big root〉middle root〉small root. There was a close relationship between the biomass of each organ and the tree factor D2H, and the accura- cy of the regression model was more than 0.9. The average biomass of tree layer was 183.19 t/hmL The distribu- tion order of biomass in each layer was trunk〉root stump〉branch〉leaf〉 bark 〉big root〉middle root〉small root. The biomass of tree layer aboveground part was 126.90 t/hm2, and the biomass of the underground part was 56.29 Uhm2, accounting for 69.27% and 30.73% of the total biomass, respectively, and the biomass of aboveground was 2.3 times higher than that of underground. The average productivity of Cinnamomum eamphora plantation was 14.00 t/ （hm2- a）, which showed a higher productivity. The productivity of tree layer was 12.22 t/ （hm2. a）, accounting for 87.29% of the total forest productivity, and the forest vegetation layer was 1.78 t/ （hm2·a）, which accounted for 12.71% of the total productivity. The productivity distribution order of each layer was arbor layer 〉 shrub grass layer 〉 litter layer, accounting for 87.29%, 8.79% and 3.93% of the total productivity, respectively.

关 键 词：香樟 人工林 生物量 生产力 回归模型 

分 类 号：S792.23[农业科学—林木遗传育种]