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|本期目录/Table of Contents|

 沱江流域两种人工针叶林群落结构比较()

《广西植物》[ISSN:1000-3142/CN:45-1134/Q]

期数:
2011年03期
页码:
357-363
栏目:
植物生态学与环境生物学
出版日期:
2011-08-01

文章信息/Info

Title:
 Comparison of community structure between two artificial coniferous forests in the Tuojiang River Valley
作者:
 陈文年12 卿东红1 张轩波12
 1.内江师范学院 生命科学学院, 四川 内江 641112; 2.四川省高等学校特色农业资源研究与利用重点实验室, 四川 内江 641112
Author(s):
 CHEN Wen-Nian12 QING Dong-Hong1 ZHANG Xuan-Bo12
 1.College of Life Science, Neijiang Normal University, Neijiang 641112, China; 2.Key Laboratory of Regional Characteristic Agricultural Resources, Neijiang 641112, China
关键词:
 湿地松 马尾松 群落结构 物种多样性 种群更新
Keywords:
 Pinus elliottii Pinus massoniana community structure species diversity regeneration of population
分类号:
-
DOI:
-
文献标识码:
A
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级和Ⅱ级的幼苗和小树,种群中以大树为主,呈现出更新不良。马尾松在各个树高级别上都形成一定的盖度,但湿地松在1 m以下不形成盖度,反映出湿地松缺乏幼苗幼树,这与树高及径级研究中得出的结果是一致的。乔木层地上生物产量是湿地松林大于马尾松林;而灌木层地上生物产量却是马尾松林大于湿地松林;草本层地上生物产量则在两种林分中则无明显差异。湿地松林灌木层和草本层的物种多样性都比马尾松林低一些,这与湿地松林乔木层盖度较大,对林下灌草层的阴蔽作用有关。从快速绿化及用材的角度来看,湿地松更适合于当地大面积的推广种植。
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.

参考文献/References

备注/Memo

备注/Memo:
更新日期/Last Update: 2011-07-01