| 摘要: |
| [目的]为版纳甜龙竹的合理经营与开发提供理论依据.[方法]以位于云南省勐仑镇人工栽培的版纳甜龙竹(Dendrocalamus hamiltonii Nees et Arn.ex Munro)林为研究对象,测定了版纳甜龙竹单株各器官含水率和生物量、种群生物量结构,并对胸径与各器官生物量的相关性进行了拟合.[结果]版纳甜龙竹秆、枝、叶3种器官含水率随龄级的增加均呈下降趋势,其中以秆的含水率下降幅度最大,竹叶的含水率变化较小.人工林的总生物量为141 598 kg/hm2,其秆、枝、叶、地下部的生物量分别为74 674,23 381,8 071,35 472 kg/hm2,占总生物量的比例依次为52.74%,16.51%,5.70%,25.05%;Ⅰ龄级、Ⅱ龄级、Ⅲ龄级、Ⅳ龄级和≥Ⅴ龄级版纳甜龙竹的生物量分别为15 899,21 013,37 124,32 495和35 067 kg/hm2,占总生物量比例依次为11.23%,14.84%,26.22%,22.95%,24.76%;版纳甜龙竹的总生物量和秆生物量除低于慈竹以外,均比其他竹种高.版纳甜龙竹各器官生物量与胸径(D)间均具有较好的相关性,其中秆生物量(Bs)、地上部生物量(Ba)与胸径(D)间的拟合模型分别为Bs=0.180 6D1.802 2(竹龄(a)≤1)、Bs=0.080 3D2.304 4(a＞1)和Ba=0.079 5D2.455 9(a＞1),且相关性均达极显著水平.[结论]建立了竹秆胸径与各器官生物量的估测模型,在生产实践中可用其估算各器官的生物量. |
| 关键词: 版纳甜龙竹 生物量 种群结构 同归模型 |
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| 基金项目:国家科技部基础条件平台项目“林木种质资源标准化整理、整合及共享试点”(2004DKA30400-05-01-02) |
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| Biomass structure and its regression models of Dendrocalamus hamiltonii Nees et Arn. ex Munro population |
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| Abstract: |
| 【Objective】 The study was done to improve theoretical basis of reasonable operation and management and exploitation of Dendrocalamus hamiltonii.【Method】 Based on the data obtained from the cultivated forest of D.hamiltonii in Menglun Town,Yunnan province,the biomass structure of population was studied and the regression model of each biomass component based on DBH and the degree of bamboo years were constructed in this paper.【Result】 The result showed that the total biomass was 141 598 kg/hm2,the moisture content of stem,twig and foliage were degressive with the increase of stem year,the degression of stem was the biggest and the degression of foliage was the smallest in the three organs.The biomass of Stem,twig,foliage and underground were 74 674,23 381,8 071,35 472 kg/hm2,and the proportions were 54.74%,16.51%,5.70%,25.05% respectively;the biomass of Ⅰdegree,Ⅱdegree,Ⅲdegree,Ⅳdegree,Ⅴdegree and above were 15 899,21 013,37 124,32 495,35 067 kg/hm2,and the proportions were 11.23%,14.84%,26.22%,22.95%,24.76% respectively;The total biomass and the stem biomass were more than other bamboo species except Neosinocalamus offinis.In addition,DBH and the different components of D.hamiltonii were highly correlative each other,the model of Stem weight (Bs) and the aboveground weight (Ba) based on DBH (D) were Bs=0.180 6D1.802 2(a≤1),Bs=0.080 3D2.304 4(a＞1) and Ba=0.079 5D2.455 9(a＞1) respectively.【Conclusion】 By using these models,the different biomass components of D.hamiltonii could be estimated in practice. |
| Key words: Dendrocalamus hamiltonii biomass population structure regression model |
