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Acta Prataculturae Sinica ›› 2025, Vol. 34 ›› Issue (7): 132-144.DOI: 10.11686/cyxb2024327

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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

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