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[1]赵燕波,张丹桔,张健,等.不同郁闭度马尾松人工林林下植物多样性[J].应用与环境生物学报,2016,22(06):1048-1054.[doi:10.3724/SP.J.1145.2016.04052]
 ZHAO Yanbo,ZHANG Danju,ZHANG Jian**,et al.Understory vegetation diversity of Pinus massoniana plantations with various canopy density[J].Chinese Journal of Applied & Environmental Biology,2016,22(06):1048-1054.[doi:10.3724/SP.J.1145.2016.04052]
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不同郁闭度马尾松人工林林下植物多样性()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
22卷
期数:
2016年06期
页码:
1048-1054
栏目:
“生态系统的格局与恢复”专栏论文
出版日期:
2016-12-25

文章信息/Info

Title:
Understory vegetation diversity of Pinus massoniana plantations with various canopy density
作者:
赵燕波张丹桔张健周泓杨魏大平张捷袁亚玲
四川农业大学生态林业研究所,四川省林业生态工程重点实验室 成都 611130
Author(s):
ZHAO Yanbo ZHANG Danju ZHANG Jian** ZHOU Hongyang WEI Daping ZHANG jie & YUAN Yaling
Key Laboratory of Ecological Forestry Engineering of Sichuan Province, Institute of Ecology & Forestry, Sichuan Agricultural University, Chengdu 611130, China
关键词:
郁闭度林下植物多样性马尾松人工林
Keywords:
canopy density understory vegetation diversity Pinus massoniana plantation
分类号:
S718.5
DOI:
10.3724/SP.J.1145.2016.04052
摘要:
对现有11年生马尾松(Pinus massoniana)人工林通过均匀间伐、抚育修枝,结合冠层分析仪测定郁闭度,形成郁闭度约为0.9、0.8、0.7、0.6、0.5的5个梯度林分,研究不同郁闭度林下植物组成及多样性特征,结果表明:(1)各郁闭度林下植物物种重要值分配较为平均,灌木中枹栎(Quercus serrate)、毛桐(Mallotus barbatus)、黄牛奶(Symplocos laurina)较高,草本中铁芒萁(Dicranopteris dichotoma)、金星蕨(Parathelypteris glanduligera)、狗脊蕨(Woodwardia japonila)、山菅兰(Dianella ensifolia)较高,在各郁闭度都占主要优势. (2)随郁闭度减小,林下植物物种数、Margalef丰富度指数、Simpson优势度指数、Shannon-wiener多样性指数都有增大趋势,但多在0.6或0.5郁闭度较0.9郁闭度才有显著增加,在0.5郁闭度灌木物种数又有减小;各郁闭度林下灌木、草本Pielou均匀度指数差异都不显著,5个郁闭度林分草本Alatato均匀度指数差异较小,灌木Alatato均匀度指数在0.6郁闭度中最高,0.5郁闭度较0.6郁闭度又相对降低. (3)各郁闭度林下植物生活型都是以高位芽为主,占比均为50%-60%,在0.6、0.7郁闭度中出现了地上芽植物,0.6、0.5郁闭度中出现了一年生植物、大型高位芽植物,地下芽植物百分比在0.5郁闭度有明显升高. (4)0.9郁闭度林分分别与其他各郁闭度林下植物群落相似系数都较低,0.5、0.6、0.7郁闭度之间群落相似系数相近且较高,都超过70%,在0.7、0.6郁闭度左右物种类别有稳定的趋势,0.5与0.8郁闭度林分群落相似系数又有下降,又有许多新物种更新. 综合而言,随郁闭度减小,林下植物物种数、生活型层次和多样性指数都呈增大趋势,在0.6郁闭度中各项指标表现最优,更小郁闭度可能会导致林下植物物种数、均匀度和多样性相对减小,不利于林地地力维持. (图3 表5 参30)
Abstract:
This study investigated the species composition and diversity of understory vegetation of Pinus massoniana plantations. The plantations were of five canopy density gradients as about 0.9, 0.8, 0.7, 0.6, 0.5, respectively. The investigation used methods including uniform thinning, pruning, and canopy analysis system (CI-110). The results showed comparatively even important values of understory vegetation in P. massoniana plantations with different canopy densities; Quercus serrate, Mallotus barbatus and Symplocos laurina were the dominant shrubs, Dicranopteris dichotoma, Parathelypteris glanduligera, Woodwardia japonila, Dianella ensifolia were the dominant herbages. With the decrease of canopy density, the species number, Margalef richness index, Simpson diversity index and Shannon-wiener diversity index of understory vegetation showed an increasing trend, while the shrub species number reduced at the canopy density of 0.5. The Pielou evenness index of shrub and herbage and the Alatato evenness index of herbage showed no significant difference in P. massoniana plantations with different canopy densities, but the Alatato evenness index of shrubs was highest at 0.6; the Alatato evenness index of shrubs at 0.5 canopy density was lower than 0.6. The understory vegetation was mainly Phanerophytes (50%-60%); Chamaephytes appeared at 0.6 and 0.7 canopy coverage densities; Pherophytes and Meso-phanerophytes appeared at 0.5 and 0.6 canopy coverage densities; the percentage of geophytes at 0.5 was obviously higher than others. The understory vegetation of P. massoniana plantations of 0.9 canopy coverage density had lower coefficient of community similarity with others, which was similar among the understory vegetation in P. massoniana plantations with 0.5, 0.6 and 0.7 canopy coverage density. The coefficient of the vegetation community similarity between 0.5 and 0.8 was relatively low. In general, with the decrease of canopy density, the species diversity index and the number of species and life forms of understory plants increased, and the canopy coverage density of 0.6 was the optimal canopy density for succession of understory vegetation. Below the canopy coverage density, the number of species, evenness index and species diversity index might decrease, and reduce the productivity and the site fertility in Pinus massoniana plantations.

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更新日期/Last Update: 2016-12-30