| 李杰，乌仁其其格，黄振艳.呼伦贝尔草甸草原不同退化程度草地群落物种组成特征分析[J].广东农业科学,2013,40(18):139-143 |
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呼伦贝尔草甸草原不同退化程度草地群落物种组成特征分析 |
| Analysis on characteristic of plant community species composition under different degeneration degree grassland in the meadow steppe of Hulunbuir |
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| DOI： |
| 中文关键词: 草甸草原 退化程度 群落 物种组成 |
| 英文关键词: meadow steppe degeneration degree community species composition |
| 基金项目: |
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| 摘要点击次数: 1426 |
| 全文下载次数: 644 |
| 中文摘要: |
| 以呼伦贝尔草甸草原羊草+杂类草群落和贝加尔针茅+羊草群落为研究对象，对不同退化程度下的植物群落组成定量分析研究。结果表明，随着草地退化程度的增加，群落物种组成逐渐单一，数量逐渐减少，其中代表草甸草原成分的物种重要值变化较明显，群落伴生种的重要值随着退化程度的增加而降低，有些耐践踏、适口性差的物种如寸草苔、披针叶黄华、糙隐子草等对草甸草原具有一定指示作用的物种重要值具有上升的趋势；群落物种组成发生明显变化，轻度和中度退化草地仍以禾本科为优势种，退化指示类的菊科植物的重要地位得到提升，中度退化区蔷薇科和毛茛科植物不断增加，袁重度退化阶段，多以耐践踏的菊科植物、莎草科和小型禾草占优势。 |
| 英文摘要: |
| The characteristics of community in the Leymus chinensis+ford community and Stipa baicalensis community under different degeneration clegree grassland were investigated. The composition of community species was gradually unitary, quantity reduced , the important value of species changed obviously with grassland degeneration increasing in Hulunbuir meadow steppe. The species important values of bearing trample and palatability , such as Boeruera duriuscula, Thermopsis lanceolata and Cleistogenes squarrosa, increased gradually with grassland degeneration increasing. The grass and composite which reduced gradually in Stipa baicalensis community reduced first then increased in Leymus chinensis community. The leguminous plant reduced, the rose family, buttercup branch plant increased, other branch plant increased first, then reduced with grassland degeneration increasing. |
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