Acta Agrestia Sinica

Acta Agrestia Sinica ›› 2018, Vol. 26 ›› Issue (6): 1290-1297.DOI: 10.11733/j.issn.1007-0435.2018.06.002

Previous Articles     Next Articles

Community Structure and Plant Diversity under Different Degrees of Degraded Grassland in Tianzhu,Gansu

YANG Xiao-mei1,2, YAO Tuo1,2, WANG Li-de2,4, ZHANG Jian-gui1,2, LI Qi2,3, FENG Ying1,2, LI Hai-yun2,3, LI Chang-ning2,3, GAO Ya-ming2,3   

  1. 1. College of Grass Industry, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China;
    2. Key Laboratory of Grassland Ecosystem Education, Lanzhou, Gansu Province 730070, China;
    3. China-America Grassland and Animal Husbandry Sustainable Development Research Center, Lanzhou, Gansu Province 730070, China;
    4. Gansu Provincial Institute of Sand Control, Lanzhou, Gansu Province 730070, China
  • Received:2018-07-09 Revised:2018-10-26 Online:2018-12-15 Published:2019-01-28

天祝不同退化程度草地植物群落结构与物种多样性研究

杨晓玫1,2, 姚拓1,2, 王理德2,4, 张建贵1,2, 李琦2,3, 冯影1,2, 李海云2,3, 李昌宁2,3, 高亚敏2,3   

  1. 1. 甘肃农业大学草业学院, 甘肃 兰州 730070;
    2. 草业生态系统教育部重点实验室, 甘肃 兰州 730070;
    3. 中-美草地畜牧业可持续发展研究中心, 甘肃 兰州 730070;
    4. 甘肃省治沙研究所, 甘肃 兰州 730070
  • 通讯作者: 姚拓
  • 作者简介:杨晓玫(1992-),女,博士研究生,主要从事草地微生物多样性研究,E-mail:yangxiaomeirz@126.com
  • 基金资助:
    国家自然科学基金（31660688）；现代农业产业技术体系建设专项资金项目（CARS-35）；中央引导地方科技发展专项：祁连山东段退化生态系统修复技术创新示范（ydzx20176200004893）资助

PDF

Abstract: In order to explore the dynamic characteristics of the stability and species diversity of different degraded alpine grasslands in Tianzhu County,the community structure and plant composition and diversity of alpine meadow under different degrees of degradation,including light degradation(LDG),moderate degradation (MDG),and severe degradation (SDG),were analyzed. The results indicated that:the four degrees and one quantity of plant community characteristics of three different degraded grasslands was a gradually decreasing trend and the differences were significant (P<0.05). The order was LDG> MDG> SDG. There were more than 21 plant species of 19 genus in 11 families,mainly including leguminosae,compositae. Among them,gramineae and cyperaceae played a key role in ecological stability. The perennial herb dominated in the community,annual herb was the lowest,and there were no arbor layer and shrub layer. The species dominance index was the highest in SDG,that is,0.31,while the species richness index and the diversity index were the highest in LDG,which were 0.89 and 2.34,respectively. In summary,different degrees of degradation had a great impact on the productivityof the Tianzhu alpine grassland. With the increase of the degraded degree of alpine grassland,the plant diversity gradually reduced,and the plant community structure became singleness. Therefore,adequate attention should be paid to the utilization and conservation of the grassland in this area,and the grasslands should be rationally utilized and scientifically managed.

Key words: Tianzhu, Alpine meadow, Degradation, Plant diversity, Community

摘要： 为探究天祝高寒草地不同退化程度生态系统的稳定性及物种多样性的动态变化特征规律，以天祝高寒草地为对象，采用样方法对不同退化程度草地植物群落结构和物种组成进行了分析，结果表明：天祝高寒草地轻度退化草地（LDG）、中度退化草地（MDG）和重度退化草地（SDG）植物群落四度一量特征整体呈现逐渐降低趋势且差异显著（P<0.05），表现为LDG > MDG > SDG；研究区植物共11科19属21种，植物主要为豆科、菊科、禾本科、蔷薇科和莎草科，其中莎草科和禾本科对群落的稳定性起决定作用，其生态型群落呈现多年生草本植物占优势，一年生草本植物最少，无乔木层和灌木层，不同退化程度草地群落物种优势度指数在重度退化草地最高为0.31，丰富度指数和多样性指数在轻度退化草地最高分别为0.89和2.34。综上，随着天祝高寒草地退化程度的增加，其植物多样性逐渐降低，植物群落结构分布单一，应重视该地区草地的保护，合理利用和科学管理草地。

关键词: 天祝, 高寒草地, 退化程度, 植物群落结构, 物种多样性

CLC Number: