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Acta Prataculturae Sinica ›› 2024, Vol. 33 ›› Issue (12): 99-110.DOI: 10.11686/cyxb2024036

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Allelopathic effects of aqueous extracts from Reaumuria soongorica and Salsola passerina on seedling growth

Yu-ying WANG(), Pei-fang CHONG(), Jian-xi ZHANG, Hang-hang LIU, Xin-guang BAO, Xue-ying WANG   

  1. College of Forestry,Gansu Agricultural University,Lanzhou 730070,China
  • Received:2024-01-27 Revised:2024-03-04 Online:2024-12-20 Published:2024-10-09
  • Contact: Pei-fang CHONG

Abstract:

Plants can enhance their competitiveness through allelopathy. It has been observed that the desert plant Reaumuria soongorica grows better with Salsola passerina than it does alone. The aim of this study was to determine whether this phenomenon is related to allelopathy. Pot experiments were conducted to determine the effects of aqueous extracts of different organs of 1-year-old R. soongorica and S. passerina plants at a range of concentrations (0.02, 0.04, 0.06, and 0.08 g?mL–1) on the growth and physiology of seedlings. We found that at the same mass concentration, leaf extracts of R. soongorica and S. passerina had the strongest allelopathic inhibitory effect on plant growth, followed by stem extracts, and then root extracts. This order of allelopathic effects of aqueous extracts of R. soongorica and S. passerina on seedling growth was the same, on the whole, for all extract concentrations. The treatments at a concentration of 0.02 g?mL–1 had the weakest inhibitory effects, and those at 0.08 g?mL–1 had the strongest inhibitory effects. In general, the aqueous extracts of R. soongorica organs had a stronger inhibitory effect on the growth of S. passerina seedlings than the aqueous extracts of S. passerina organs had on R. soongorica seedlings. In summary, there is an allelopathic interaction between R. soongorica and S. passerina. Therefore, when establishing artificial vegetation in desert areas, allelopathy between species should be considered, and appropriate planting methods should be selected to achieve the best revegetation outcomes. These findings provide insight for planning the ecological restoration and protection of desert ecosystems.

Key words: Reaumuria soongorica, Salsola passerina, seedling growth, allelopathic effect