不同竹类人工林生态系统生物量空间分配格局  

Characteristics of biomass allocation in different bamboo plantations

作　　者：鹿士杨 潘丽萍 彭晚霞[2] 宋同清[2] 杜虎[2] 刘永贤 LU Shiyang;PAN Liping;PENG Wanxia;SONG Tongqing;DU Hu;LIU Yongxian(Agricultural Resource and Environment Research Institute,Guangxi Academy of Agricultural Sciences,Nanning 530000,China;Key Laboratory of Agro-ecological Processes in Subtropical Region,Institute of Subtropical Agriculture,Chinese Academy of Sciences,Changsha 410125,China;Huanjiang Observation and Research Station of Karst Ecosystem,Chinese Academy of Sciences,Huanjiang 547100,Guangxi,China)

机构地区：[1]广西壮族自治区农业科学院农业资源与环境研究所,南宁530000 [2]中国科学院亚热带农业生态研究所亚热带农业生态过程重点实验室,长沙410125

出　　处：《生态科学》2018年第4期123-129,共7页Ecological Science

基　　金：国家自然科学基金项目地区科学基金项目(31660141);国家重点研发计划(2016YFC0502405);广西重点研发计划(桂科AB16380255;桂科AB17129009)

摘　　要：以胸径为单变量,利用幂函数、指数函数和多项式函数方程模拟麻竹(Dendrocalamus latiflorus)、毛竹(Phyllostachys pubescens)和粉单竹(Bambusoideae cerosissima)林各类器官的生物量,研究比较了3种不同种类竹林的生物量分配特征。结果表明,所选模型可以很好的估测竹林及各器官生物量。麻竹、毛竹和粉单竹单株平均生物量为18.160、13.736和4.372 kg,其林分生物量分别为15.124、28.598和5.102 t·ha^(-1)。竹林单株和林分器官分配一致,均以竹秆最大,其次为竹根,再者为竹枝、竹叶,但麻竹竹叶>竹枝例外。不同竹林生态系统总生物量与灌木层、草本层、凋落物变化规律一致,粉单竹>毛竹>麻竹;但各层生物量分配不同,麻竹和毛竹表现为乔木层>凋落物层>灌木层、草本层,乔木层占绝对优势;而粉单竹表现为草本层>凋落物层>灌木层>乔木层,且各层次优势不明显。根据单株和林分生物量分配特征,地上部分和地下部分生物量不均,应适当调整竹林林分密度和制定合理的采伐措施,提高竹林的生产力水平,从而增强其碳储存能力。Based on the data of diameter at the breast height（DBH）, characteristics of biomass allocation in different bamboo plantations were studied using power function, exponential function, and polynomial equation, respectively. Three types of bamboo plantations were selected, i.e. Dendrocalamus latiflorus, Phyllostachys pubescens, and Bambusoideae cerosissima. The results indicated that biomass allocation in bamboo organs could be precisely predicted by the models. Individual plant biomass of D. latiflorus, P. pubescens, and B. cerosissima were on average 18.160, 13.736, and 4.372 kg, respectively. While the total biomass of three bamboo plantations was 15.124, 28.598, and 5.102 t·ha^-1, respectively. Biomass allocation in individual bamboo plant for the three bamboo types followed the order of stem 〉root 〉branch〉 leaf, except for D. latiflorus in which the biomass of leaf was larger than branch. The total biomass of the three bamboo plantation ecosystems was in the order of B. cerosissima 〉P. pubescens〉 D. Latifloru, and the same pattern was observed in shrub layer, herbaceous layer, and litter layer. However, the biomass allocation in each layer differed among the three bamboo plantations. For example, biomass allocation followed the order of canopy 〉litter layer 〉shrub layer 〉herbaceous layer in D. Latiflorus and P. pubescens plantations, while followed the order of herbaceous layer〉 litter layer 〉shrub layer 〉canopy in B. cerosissima plantations. The results suggested that, to enhance the productivity of bamboo plantation and increase carbon sequestration, it should adjust bamboo stand density and develop rational harvest regimes according to biomass allocation.

关 键 词：生物量 空间 分配格局 生态系统 竹林 

分 类 号：Q948[生物学—植物学]