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草业学报 ›› 2025, Vol. 34 ›› Issue (7): 132-144.DOI: 10.11686/cyxb2024327

• 研究论文 • 上一篇    

外源添加物对三江源高寒草甸苔藓结皮快速培育的影响

郭龙欣1,2(), 张铭洋1,3, 杨永胜1(), 庞博1, 张振华1,4, 张秀娟2   

  1. 1.中国科学院西北高原生物研究所,中国科学院高原生物适应与进化重点实验室,青海 西宁 810008
    2.长江大学园艺园林学院,湖北 荆州 434025
    3.中国科学院大学,北京 100039
    4.青海海北高寒草地生态系统国家野外科学观测研究站,青海 西宁 810008
  • 收稿日期:2024-08-27 修回日期:2024-10-30 出版日期:2025-07-20 发布日期:2025-05-12
  • 通讯作者: 杨永胜
  • 作者简介:E-mail: ysyang@nwipb.cas.cn
    郭龙欣(2000-),女,江西吉安人,在读硕士。E-mail: 13797399897@163.com
  • 基金资助:
    中国科学院青海省人民政府三江源国家公园联合研究专项(LHZX-2021-01);青海省应用基础研究项目(2022-ZJ-716)

Effects of exogenous additives on the rapid cultivation of moss crusts in alpine meadows of the Three-River-Source region, China

Long-xin GUO1,2(), Ming-yang ZHANG1,3, Yong-sheng YANG1(), Bo PANG1, Zhen-hua ZHANG1,4, Xiu-juan ZHANG2   

  1. 1.Key Laboratory of Plateau Adaptation and Evolution of Plateau Biota,Northwest Institute of Plateau Biology,Chinese Academy of Sciences,Xining 810008,China
    2.College of Horticulture and Landscape Architecture,Yangtze University,Jingzhou 434025,China
    3.University of Chinese Academy of Sciences,Beijing 100039,China
    4.Qinghai Haibei National Field Research Station of Alpine Grassland Ecosystem,Xining 810008,China
  • Received:2024-08-27 Revised:2024-10-30 Online:2025-07-20 Published:2025-05-12
  • Contact: Yong-sheng YANG

摘要:

为探究三江源地区高寒草甸苔藓结皮快速培育方式,利用正交试验与完全组合试验相结合的设计方法,研究了养分因子、菌类和植物生长调节剂噻苯隆(TDZ)3类外源添加物对苔藓结皮生长发育过程的影响。结果表明:1)养分因子碳(C)添加显著抑制苔藓结皮株高,氮(N)、磷(P)的添加对苔藓结皮盖度和高度具有显著影响;2)菌类和TDZ添加均对苔藓结皮株高具有显著影响(P<0.05),其中TDZ对结皮盖度具有一定抑制作用;3)TDZ与放线菌的交互作用在苔藓结皮培育过程中具有一定积极影响;4)快速培育三江源高寒草甸的最佳因子组合为巨大芽孢杆菌(1 g·kg-1基质)+蒸馏水,在人工气候室条件下培育70 d,苔藓结皮盖度、密度、株高及叶绿素a含量分别达到90.35%,31.39 株·cm-2,1.86 mm和7.39 μg·cm-2。综上,三江源地区苔藓结皮培育过程中受到外源因素影响较大,且在添加巨大芽孢杆菌条件下长势较好,研究结果为该地区退化高寒草甸苔藓结皮快速培育提供一定参考。

关键词: 三江源, 苔藓结皮, 养分因子, 菌类, 植物生长调节剂

Abstract:

Establishment of moss crusts plays an important role in the conservation and restoration of alpine meadows in the Three-River-Source region. This research investigated methods for more rapid moss crust establishment. An orthogonal, full factorial experimentally design was used to investigate the effects of nutrient factors, a companion fungus and the plant growth regulator thidiazuron(TDZ) on the growth of moss crusts. It was found that: 1) The addition of the nutrient factor carbon (C) significantly inhibited the height of the moss crust, and the addition of nitrogen (N) and phosphorus (P) had significant effects on the coverage and height of the moss crust. 2) Fungus addition and TDZ supplementation resulted in significant increase in plant height of the moss crust (P<0.05), and TDZ had an inhibitory effect on crust cover; 3) The interaction of TDZ with actinomyces had some positive effects on the cultivation of moss crust; 4) In the complete combination experiment, the optimal factor combination for rapid cultivation of alpine meadow in the Three-River-Source region was Bacillus megaterium (1 g·kg-1 substrate)+distilled water. After 70 days growth in an artificial climate chamber under this treatment the moss crust cover was 90.35%, plant density was 31.39 plants·cm-2, plant height was 1.86 mm and chlorophyll a content was 7.39 μg·cm-2, respectively. In conclusion, the moss crust cultivation process in the Three-River-Source region was greatly affected by exogenous factors, and the growth was better with the addition of B. megaterium, which accelerated the establishment moss crust in this experiment.

Key words: the Three-River-Source region, moss crust, nutrient factors, fungus, plant growth regulator