草地学报

›› 2012, Vol. 20 ›› Issue (4): 616-620.DOI: 10.11733/j.issn.1007-0435.2012.04.003

• 研究论文 • 上一篇    下一篇

不同恢复措施对西藏安多高寒退化草地植被的影响

孙磊1, 王向涛1, 魏学红1, 杨晓梅2, 武高林2   

  1. 1. 西藏农牧学院动物科学学院, 西藏 林芝 860000;
    2. 西北农林科技大学 中国科学院水利部水土保持研究所 黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西 杨凌 712100
  • 收稿日期:2011-12-27 修回日期:2012-03-11 出版日期:2012-08-15 发布日期:2012-08-28
  • 通讯作者: 武高林
  • 作者简介:孙磊(1978-),男,江苏徐州人,讲师,学士,主要从事西藏草地生态方面的教学与科研工作,E-mail:xizangsunlei@163.com
  • 基金资助:
    教育部人文社会科学研究项目基金(09YJC840032);国家自然科学基金项目(30860061);科技部农业科技成果转化资金项目(2010GB2F400453);国家社科基金(XZ1121)资助

Effects of Restoration Measures on Vegetation Features of Alpine Degraded Grassland of Amdo County in Tibet

SUN Lei1, WANG Xiang-tao1, WEI Xue-hong1, YANG Xiao-mei2, WU Gao-lin2   

  1. 1. Animal Science Technology Department of Tibet Agriculture and Animal Husbandry College, Linzhi, Tibet 860000, China;
    2. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation of Chinese Academy of Sciences and Ministry of Water Resources/Northwest A&F University, Yangling, Shaanxi Province 712100, China
  • Received:2011-12-27 Revised:2012-03-11 Online:2012-08-15 Published:2012-08-28

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摘要： 为探讨不同恢复措施条件对草地植被特征、地下生物量、地下种子库以及多样性等方面的影响,在西藏安多典型退化草地进行围栏,并选用细茎冰草(Agpoyron trachyeaulun L.)、垂穗披碱草(Elymus nutans Griseb)、无芒雀麦(Bromus inermis Layss)和冷地早熟禾(Poa crymophila Keng)4种牧草,在围栏内进行免耕补播的试验研究。结果表明:经过免耕补播和围栏封育后,草地植物高度、盖度、产量均有不同程度的提高;植物多样性有少量增加,植被优势种差异较显著;植物群落地下生物量变化幅度较大,特别是经过围栏和补播的草地,其0~10 cm地下生物量增加明显;此外,土壤种子库测定表明,围栏和补播试验地种子总数明显高于围栏外,增加的种子数主要分布在0~5 cm的土层中。

关键词: 高寒退化草地, 恢复措施, 地上-地下植被特征

Abstract: Agpoyron trachyeaulun L., Elymus nutans Griseb, Bromus inermis Layss and Poa crymophila Keng were reseeded in fenced areas using no-tillage. Vegetation height, coverage and grass yield were studied in order to reveal the effects of different restoration measures for vegetation characters, underground biomass, seed bank and diversity of Amdo in a typical degraded meadow in Tibet. Results showed that vegetation height, coverage and grass yield improved after no-tillage reseeded and fenced. Plant diversities increased slightly while there were significant differences among dominant species. Further, changes were seen in underground biomass of plant communities. Biomass of 0~10 cm soil layer ascended dramatically after fenced and reseeded. Additionally, the numbers of seeds in both fenced and reseeded plots were greater outside the fence and distributed mainly within 0~5 cm soil layer.

Key words: Alpine degraded grassland, Restoration measures, Vegetation features

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