| 徐舟，查同刚，张志强，杨敬儒，陈立欣.晋西黄土区蔡家川流域不同退耕林地的物种多样性研究[J].广东农业科学,2013,40(7):170-175 |
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晋西黄土区蔡家川流域不同退耕林地的物种多样性研究 |
| Species diversities of vegetation communities of abandoned croplands in western Shanxi of the loess plateau |
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| DOI： |
| 中文关键词: 黄土高原 晋西 物种多样性 |
| 英文关键词: loess plateau western Shanxi Province species diversity |
| 基金项目:“十二五”农村领域国家科技计划项目（2011BAD38B0504） |
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| 中文摘要: |
| 为了研究晋西黄土地区不同退耕林地下的物种多样性，基于14 个样方内植被数据，通过丰富度指数、多样性指数、Simpson 指数、均匀度指数研究晋西黄土地区主要植被群落的物种多样性。结果表明，14 个样地共记录了102 种高等植物，草本层种类73 种，灌木层包括乔木幼树共31 种，乔木层12 种；不同类型森林群落内部各层的群落多样性基本都表现为：草本层>灌木层>乔木层：但在山杨（Populus davidiana）次生林和山杨辽东栎（Quercusliaotungensi）次生林中灌木层高于草本层。群落之间灌木层物种多样性：次生林>人工林，以山杨次生林和刺槐（Robinia pseudoacacia）纯林多样性最高；草本层物种多样性：人工林>次生林，刺槐侧柏（Platycladus orientalis）混交林和油松（Pinus tabulaeformi）人工林的多样性最高，刺槐人工林和山杨辽东栎次生林草本多样性最低。不同林分灌木层和草本层的丰富度表现为，灌木层：次生林>混交林>纯林；草本层：纯林≥混交林>次生林。β多样性显示，混交林相比较于纯林与次生林之间差异小。研究结果表明混交林比单一树种造林有更高的群落物种多样性，低密度造林能够提高群落物种多样性。创造林隙供灌木和小乔木生长以及营林初期采用乔灌草搭配造林能够加快群落演替，促进植被恢复。 |
| 英文摘要: |
| To find out the undergrowth plants diversity in western Shanxi Province forest region of the Loess Plateau,based on the data of 14 quadrats’vegetation, richness index, diversity index, Simpson index, evenness index were adopted
to study the species diversities of major communities. The results showed that there were 102 kinds of vascular plants,
including 73 kinds of herbaccous, 31 kinds of shrub and 12 kinds of arbors. The species diversities increased in the order
of the herbaceous layers，the shrub layers and the arbor layers in different forest communities. In the shrub layer, the
species diversity appeared higher than that in herbaccous layer, like Populus davidiana secondary forest and Quercus
liaotungensi secondary forest. In different communities, the species diversities in shrub layers secondary forest were higher than plantations in P. davidiana secondary forest and Robinia pseudoacacia plantations. In herbaceous layers, plantations was higher than secondary forest in Robinia pseudoacacia +Platycladus orientalis mixed forest and Pinus tabulaeformi planation. Robinia pseudoacacia platationg and Populus davidiana +Quercus liaotungensi secondary forest was lower.Richness index was different in shrub layers and herbaceous layer, in shrub layers, it appeared the order of secondary forest, mixed forest and purebred forests, and in herbaceous layer, it appeared the order of purebred forests, mixed forest and secondary forest. Diversity analysis showed that mixed forest had more similarity to secondary forest than purebred forests. The result indicated that the afforestation in low density and the afforestation of mixed forests with multiple tree species could increase the community diversity. The vegetation recovery could be promoted through creation of forest gap and mixed configuration of species. |
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