| 放牧与刈割对科尔沁草甸植被演替的影响 |
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| 引用本文： | 李荣平,闫巧玲.放牧与刈割对科尔沁草甸植被演替的影响[J].干旱区资源与环境,2006,20(2):180-184. |
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| 作者姓名： | 李荣平 闫巧玲 |
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| 作者单位： | 1. 中国气象局沈阳大气环境研究所,沈阳,110016
2. 中国科学院沈阳应用生态研究所,沈阳,110016;中国科学院研究生院,北京,100039 |
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| 基金项目： | 中国科学院前沿领域研究基金 |
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| 摘 要： | 本文研究了放牧与刈割两种草地利用方式对科尔沁草甸植被演替的影响。结果表明:1)在自由放牧干扰下,优势度最大的前五个种为虎尾草(27.8)、蒲公英(3.52)、狼毒(3.42)、野韭菜(3.03)、鹅绒委陵菜(2.67);在秋季割草干扰下,优势度最大的前五个种为大油芒(9.57)、狗尾草(7.36)、野古草(6.36)、洽草(4.85)、芦苇(4.74)等五种禾本科植物;2)在自由放牧干扰下,一年生植物在群落中占据重要地位,其优势度为35.0,小于多年生植物的优势度55.9;在割草干扰下,多年生植物在群落中占据绝对优势,其优势度为82.9,大于一年生植物优势度10.6;3)在放牧扰动下,草地群落物种替代表现在不同植物生活型之间,主要是多年生草本为一年生草本和灌木所替代;表现在同一生活型不同物种之间,主要是多年生优质牧草为多年生劣质牧草或有毒有害杂草替代。
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| 关 键 词： | 放牧 刈割 草甸植物 植被演替 |
| 文章编号： | 1003-7578（2006）02-180-05 |
| 收稿时间： | 2004-12-30 |
| 修稿时间： | 2004年12月30 |
Effects of Grazing and Mowing on the Meadow Vegetation Succession in Kerqin Steppe |
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| LI Rong-ping,YAN Qiao-ling.Effects of Grazing and Mowing on the Meadow Vegetation Succession in Kerqin Steppe[J].Journal of Arid Land Resources and Environment,2006,20(2):180-184. |
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| Authors: | LI Rong-ping YAN Qiao-ling |
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| Institution: | 1, Institute of Atmospheric Environment of China Meteorological Administration, Shenyang 110016 ; 2. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016; 3. Graduate School of the Chinese Academy of Sciences, Beijing 100039,China |
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| Abstract: | In this paper,the effects of grazing and mowing on meadow vegetation succession in Kerqin Steppe were studied.The results were as follows: 1) under free grazing,the biggest advantage of the first five species were Chloris virgata(27.8)?Taraxacum mongolicum(3.52)?Stellera chamaejasme(3.42)?Allium tuberosum(3.03)?Potentilla anserina(2.67);under mowing in autumn,the biggest advantage of the first five species were Spodiopogon sibiricus(9.57)?Setaria viridis(7.36)?Arundinella hirta(6.36)?Koeleria crista(4.85)?Phragmites communis(4.74),which were all plants in Gramineae.2) under free grazing,annualsoccupied important status,whose advantage was 82.9,smaller than that of perennials(55.9);under mowing,perennials dominated in the community,whose advantage was 82.9,larger than that of annuals(10.6);3) under grazing,species replacement in grassland community was represented as different life types and different species in the same life type,i.e.perennialswere replaced by annualsand shrubs,and inferior perennialherbages or toxic and harmful weeds superseded superiorperennialherbages. |
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| Keywords: | grazing mowing meadow plants vegetation succession |
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