| 封育对干热河谷稀树灌草丛退化草地土壤种子库和植物多样性的影响 |
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| 引用本文： | 张建利,王海宁,毕玉芬,张文.封育对干热河谷稀树灌草丛退化草地土壤种子库和植物多样性的影响[J].草原与草坪,2008(1):6-12,17. |
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| 作者姓名： | 张建利 王海宁 毕玉芬 张文 |
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| 作者单位： | 云南农业大学,动物科学学院,云南,昆明,650201 |
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| 基金项目： | 云南省自然科学基金重点项目(2003C0008Z)，云南省科技攻关项目(2004NG04)资助 |
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| 摘 要： | 于2004年对金沙江干热河谷地区典型稀树灌草丛退化草地进行了围栏封育。在封育后第1年和第2年，以未围栏封育退化草地为对照，对草地土壤种子库和植被的物种组成、密度变化、多样性变化及土壤种子库与植被群落的相似性进行了调查和分析。结果表明，随着围栏封育年限的增加，土壤种子库密度和植物密度增加极显著（P〈0．001），其物种组成主要以一年生草本为主。在围栏封育过程中，土壤种子库和物种丰富度明显下降，物种多样性降低，植被均匀性下降。随着封育年限增加，土壤种子库物种组成相似性指数和植被物种组成相似性指数均降低。
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| 关 键 词： | 金沙江干热河谷 稀树灌草丛 土壤种子库 植物多样性 |
| 文章编号： | 1009-5500（2008）01-0006-08 |
| 收稿时间： | 2007-06-21 |
| 修稿时间： | 2007-09-12 |
Effects of enclosure management on soil seed bank and vegetation diversity of degraded grassland in dry-hot valley of Jinsha River |
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| ZHANG Jian-li,WANG Hai-ning,BI Yu-fen,ZHANG Wen.Effects of enclosure management on soil seed bank and vegetation diversity of degraded grassland in dry-hot valley of Jinsha River[J].Grassland and Turf,2008(1):6-12,17. |
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| Authors: | ZHANG Jian-li WANG Hai-ning BI Yu-fen ZHANG Wen |
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| Institution: | (Faculty of Animal Science and Technology of Yunnan Agricultural University ,Kunming 650201 ,China) |
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| Abstract: | The representative degraded Savanna shrub grassland was enclosed in dry-hot valley of Jinsha River in 2004.After one or two years enclosure,some characteristics of the grassland were investigated,such as variation of soil seed bank,composition of vegetation community,seed density,diversity index and similarity index.The results show that:comparing with the control,soil seeds density and species increased very significantly(P<0.001)after one or two year enclosing,and most of the species were annual herbaceous plants.The species number,diversity index and similarity index in the two years enclosing were lower than those of one year enclosed or control after two years enclosing.The similarity index show that the species of soil seeds and vegetation community species were decreasing as the enclosure years increased.This result could provide the theoretic basis and practical support for ecological recovery of degenerated grasslands in dry-hot valley of Jinsha river. |
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| Keywords: | Jinsha River hot-dry valley savanna shrub-grass soil seed bank vegetation diversity |
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