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沱江流域两种人工针叶林群落结构比较
引用本文:陈文年,卿东红,张轩波.沱江流域两种人工针叶林群落结构比较[J].广西植物,2011,31(3):357-363.
作者姓名:陈文年  卿东红  张轩波
作者单位:1. 内江师范学院,生命科学学院,四川,内江,641112;四川省高等学校特色农业资源研究与利用重点实验室,四川,内江,641112
2. 内江师范学院,生命科学学院,四川,内江,641112
基金项目:四川省教育厅科研基金,内江师范学院自然科学重点项目,内江师范学院博士科研基金
摘    要:采用样方调查法比较了沱江流域两种人工针叶林群落的结构.结果表明,湿地松林中湿地松幼苗幼树很少;马尾松林中有较多的马尾松幼苗幼树.马尾松种群多度比湿地松种群大38%,而湿地松种群的平均高度、平均冠幅比马尾松种群分别大32.7%和22.2%.从高度结构及径级结构来看,马尾松种群在各个级别上都有分布;而在湿地松种群中,没有Ⅰ...

关 键 词:湿地松  马尾松  群落结构  物种多样性  种群更新

Comparison of community structure between two artificial coniferous forests in the Tuojiang River Valley
CHEN Wen-Nian,QING Dong-Hong,ZHANG Xuan-Bo.Comparison of community structure between two artificial coniferous forests in the Tuojiang River Valley[J].Guihaia,2011,31(3):357-363.
Authors:CHEN Wen-Nian  QING Dong-Hong  ZHANG Xuan-Bo
Institution:1.College of Life Science, Neijiang Normal University, Neijiang 641112, China; 2.Key Laboratory of Regional Characteristic Agricultural Resources, Neijiang 641112, China
Abstract:By using plot sample method,community structure of two artificial forests were studied in a low mountain area of the Tuojiang River Valley.The results showed that there were less Pinus elliottii seedlings and saplings in P.elliottii community compared with P.massoniana community.Individuals of P.massoniana were 38% more than those of P.elliottii.However,average hight and average diameter of tree crown of P.elliottii were 32.7% and 22.2% bigger than that of P.massoniana,respectively.Judged from height and DBH(diameter at breast height) structure,individuals of P.massoniana distributed through all classes.On the contrary,P.elliottii population had no individuals of class Ⅰ and Ⅱ,and was dominated by the biggest trees,suggesting that it was difficult for the population to regenerate in the future.P.massoniana at each height class could form certain coverage,but P.elliottii individuals under 1 m could not form any coverage,indicating that P.elliottii population was short of seedlings and saplings,which was consistent with the conclusion drawn from height and DBH study.Aboveground biomass yield of tree layer in P.elliottii stand was bigger than that in P.massoniana stand,while biomass of shrub layer in P.elliottii stand was smaller than that in P.massoniana stand.As to biomass of herb layer,the two stands had no significant difference.Species diversity in both shrub layer and herb layer in P.massoniana community was higher than that in P.elliottii community,which was closely related to big coverage of tree layer in P.elliottii community,because big coverage of tree layer could exert an strong negative influence on plants under tree layer.Considering fast afforestation and production of wood,it is more suitable for P.elliottii to be grown widely.
Keywords:Pinus elliottii  Pinus massoniana  community structure  species diversity  regeneration of population
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