西双版纳石灰山季雨林的生物量及其分配规律

生态学杂志

西双版纳石灰山季雨林的生物量及其分配规律

戚剑飞^1,2;唐建维¹

¹中国科学院西双版纳热带植物园，云南勐腊 666303；²中国科学院研究生院，北京 100039

收稿日期:2007-03-06 修回日期:1900-01-01 出版日期:2008-02-10 发布日期:2008-02-10

Biomass and its allocation pattern of monsoon rain forest over limestone in Xishuangbanna of Southwest China.

QI Jian-fei^1,2;TANG Jian-wei¹ 

¹Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla 666303, Yunnan, China; ²Graduate University of Chinese Academy of Sciences, Beijing 100039, China

Received:2007-03-06 Revised:1900-01-01 Online:2008-02-10 Published:2008-02-10

摘要/Abstract

摘要： 通过3块2 500 m²样地的调查资料，采用相对生长法（乔木层）和样方收获法（灌木层、草本层），研究西双版纳石灰山季雨林的生物量及其分配规律。建立了石灰山季雨林优势种尖叶闭花木、缅桐、轮叶戟、短棒柄花、油朴及林分2～5、5～20和>20 cm等3种不同径级的生物量回归方程。结果表明，西双版纳石灰山季雨林的总生物量为 (319.158 ± 79.740) t·hm^-2。其中，活体植物的贡献达96.32%，粗死木质残体和地上凋落物的总量占3.68%。乔木层生物量占活体植物的96.80%，木质藤本占2.68%，灌木层和草本层生物量分别为0.39%和0.12%。乔木层生物量的器官分配以茎为最高(63.72%)、根为18.82%、枝为15.63%，叶的比例仅为1.84%。乔木层生物量的径级分配主要集中于中等径级（20≤D≤40 cm）和大径级（D＞40 cm）中，并集中分配于少量优势树种内。石灰山季雨林的生物量处于该地区的较低水平，其叶面积指数为7.697 ± 1.419。

关键词: 阿特拉津, 土壤肥力, 土壤脲酶

Abstract: The monsoon rain forest over limestone is one of the main tropical forest vegetation types in Xishuangbanna of Southwest China. To study the biomass and its allocation of this vegetation, three permanent plots (50 m × 50 m) were established at different sites. Grid method (10 m × 10 m) was used to record all the individuals with D≥ 2.0 cm in each plot, shrub and herb species were investigated in nine 5 m × 5 m and 2 m × 2 m subquadrates, respectively. The methods of allometric dimension analysis and sampling harvest were used to estimate the biomass of tree, shrub and herbage layers, respectively. Biomass regression equations of 5 dominant tree species, i.e., Cleistanthus sumatranus, Sumbaviopsis albicans, Lasiococca comberi, Cleidion brevipetiolatumand Celtis wightii, and of three Dclasses (2-5, 5-20 and >20 cm) for the forest stands were established. The results showed the total biomass of monsoon rain forest over limestone in Xishuangbanna was （319.158±79.740） t·hm^-2. Living biomass made up 96.32% of the total biomass, and coarse woody debris and litterfall hold the rest. Tree, woody vine, shrub and herbage layers occupied 96.80%, 2.68%, 0.39% and 0.12% of the living biomass, respectively. In the allocation of tree biomass to various organs, stem accounted for 63.72%, and root, branch and leaf made up 18.82%, 15.63% and 1.84%, respectively. Among different Dclasses of tree layer, the biomass allocation concentrated on the medium (20≤D≤40 cm) and the largest classes (D＞40 cm). A few dominant species, in terms of biomass, made up a majority of the total biomass of tree layer, and the mean leaf area index (LAI) of the tree layer was 7.697±1.419. Compared with other tropical forest types, the estimated biomass of the monsoon rain forest lied in the lower range of the published values for tropical moist rain forest, and was lower than that of tropical seasonal rain forest in Xishuangbanna but higher than that in Puerto Rico and Rio Grande karst forests.

Key words: Atrazine, Soil fertility, Soil urease

戚剑飞;唐建维 . 西双版纳石灰山季雨林的生物量及其分配规律[J]. 生态学杂志.

QI Jian-fei^1,2;TANG Jian-wei¹ . Biomass and its allocation pattern of monsoon rain forest over limestone in Xishuangbanna of Southwest China. [J]. cje.

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