西双版纳白背桐群落生物量研究  

Biomass of tropical secondary Mallotus paniculatus forest in Xishuangbanna

作　　者：冯志立[1] 郑征[1] 唐建维[1] 宋启示[1] 张建侯[1] 

机构地区：[1]中国科学院西双版纳热带植物园,昆明650223

出　　处：《生态学杂志》2005年第3期238-242,共5页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(30000131和40173039);中国科学院生态系统研究网络(CERN)资助项目

摘　　要：对云南西双版纳热带次生演替初期的白背桐群落生物量进行了测定。结果表明 ,10龄群落总生物量为 5 7. 819t·hm-2 ,其中乔木层为 5 1. 0 19t·hm-2 (占群落生物量的 88 2 4 % ) ,灌木层 5 . 6 4 4t·hm-2 (占 9. 76 % ) ,层间植物 1 .0 13t·hm-2 (占 1. 75 % ) ,草本层 0 14 3t·hm-2 (占 0. 2 5 % )。与其 5龄群落相比 ,10龄群落乔木层、灌木层和层间植物的生物量分别增长了 10 5 .0 4 %、12 2 . 73%和 93 .32 % ,草本层生物量降低 83 5 3%。在演替过程中群落乔木层生物量主要集中于少数优势树种 ,白背桐、木姜子、榕树的生物量合计 2 6. 170t·hm-2 (占乔木层生物量的 5 1. 2 9% )。群落乔木层生物量主要以小径级树木的生物量为主 ,其器官生物量积累的大小顺序依次为 :干 >枝 >根 >叶。Employing standard tree regression analysis (for trees) and harvest method,the biomass of tropical secondary forest dominated by Mallotus paniculatus in Xishuangbanna was studied. Total biomass of a 10-year-old community was 57.819 t·hm -2,with the biomass of tree,shrub,inter-layer and herb layers 51.019 t·hm -2 (88.24% of community biomass),5.644 t·hm -2 (9.76%),1.013 t·hm -2 (1.75%) and 0.143 t·hm -2 (0 25%),respectively. From the 5-year-old to 10-year-old plant community,biomass of tree,shrub and inter-layer layers increased by 105.04%,122.73% and 93.32%,respectively,while that of the herb layer decreased by 83.53%. The biomass was mainly concentrated in a few dominant species in the tree layer. Biomass of Mallotus paniculatus,Litsea sp. and Ficus sp. reached 26.170 t·hm -2,accounting for 51.29% of tree layer biomass. The smaller DBH classes mainly contributed to the biomass of tree layer,and organs in the tree layer ranked in order of stem>branch>root>leaf.

关 键 词：白背桐 次生演替 生物量 西双版纳 

分 类 号：Q948.1[生物学—植物学]