黄龙山不同白桦林群落结构特征研究  

Structural Characteristics of Different Betula platyphylla Communities in Huanglong Mountain

作　　者：郭其强[1] 张文辉[1] 何景峰[1] 王贞红[1] 

机构地区：[1]西北农林科技大学林学院,陕西杨陵712100

出　　处：《西北植物学报》2007年第1期132-138,共7页Acta Botanica Boreali-Occidentalia Sinica

基　　金：国家科技支撑项目(TBKJ-2003-07)

摘　　要：在黄龙山林区以4种不同白桦林群落类型为研究对象,共设置20m×20m的样地15块,从林分特征、物种组成、物种多样性、灌木和草本生物量及乔木蓄积量等方面,对不同白桦林群落类型结构特征进行调查分析.结果显示:(1)群落B林(白桦+茶条槭混交)中白桦林分状况为最好,其次为群落A(油松+白桦混交林),群落D(白桦纯林)最差;(2)不同群落中植物种类分别为群落A(51种)>群落B(49种)>群落D(48种)>群落C(38种);(3)物种多样性指数为群落A>群落B>群落C>群落D;(4)不同群落内草本和灌木总生物量排序为群落D(73.19t·hm-2)>群落B(65.07t·hm-2)>群落C(59.93t·hm-2)>群落A(44.82 t·hm-2),乔木蓄积量为群落A(123.50m3·hm-2)>群落D(69.50m3·hm-2)>群落B(53.25m3·hm-2)>群落C(50.25m3·hm-2).研究结果表明,黄龙山不同白桦林群落中混交林在生长状况、物种组成、物种多样性和生物量方面均优于纯白桦林.表明白桦混交林对保持黄龙山森林群落稳定性,提高林分质量,实现白桦林向松栎林的逐渐过渡有重要意义.Four different types of Betula platyphylla communities were studied in terms of stand character, species composition and diversity,shrub and arbor biomasses and amount of growing arbor stock with fifteen quadrats（20 m × 20 m）in Huanglong Mountain. It was shown that （1） Betula platyphylla stand was the best in the communites of Betula platyphylla and Acer ginnala mixed forest,medium in the communities of Betula platyphylla and Pinus tabulaefomis mixed forest and the poorest in the communities of Betula platyphylla pure forest; （2） The species numbers of different communities ranked in the decreasing order of the communities of Betula platyphylla and Pinus tabulaefornis mixed forest（51 species）, Betula platyphylla and Acer ginnala mixed forest （49 species）, Betula platyphylla pure forest （48 species） and Quercus liaotungensis and Betula platyphylla mixed forest（38 species） t ; （3） The species diversity indexes of different communities ranked in the decreasing order of the communities of Betula platyphylla and Pinus tabulae fomis mixed forest,Betula plat yph ylla and Acer ginnala mixed forest, Quercus liaotungensis and Betula platyphylla mixed forest and Betula platyphylla pure forest; （4） The total biomasses of the shrubs and herbs in different communities ranked in the decreasing order of Betula platyphylla pure forest （73.19 tons per m^2）, Betula platyphylla and Acer ginnala mixed forest （65.07 tons per m^2）, Quercus liaotungensis and Betula platyphylla mixed forest（59.93 tons per m^2 ） and Betula platyphylla and Pinus tabulaefomis mixed forest（44.82 tons per m^2） and the amounts of the growing arbor stocks in the communities ranked in the decreaseing order of Betula platyphylla and Pinus tabulaefomis mixed foret （123.50 cubic meters per m^2）, Betula platyphylla pure forest （69. 50 cubic meters per m^2）, Betula platyphylla and Acer ginnala mixed forest（53.25 cubic meters per m^2） and Quercus liaotungensis and Betula platyphylla mixed forest（50. 25

关 键 词：白桦林群落 林分状况 物种组成 物种多样性 生物量 

分 类 号：Q948.157[生物学—植物学]