Xibei zhiwu xuebao (Jun 2024)

Study on soil seed bank and seedling regeneration of different populations of Amygdalus ledebouriana in wild fruit forest in Ta􀆳e Basin

  • GUAN Yue,
  • SHEN Wenjing,
  • LU Biao,
  • WANG Yanxin,
  • Akejulidezi Nurgailide,
  • ZHOU Long

DOI
https://doi.org/10.7606/j.issn.1000-4025.20230734
Journal volume & issue
Vol. 44, no. 6
pp. 961 – 967

Abstract

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Abstract [Objective] The study aims to investigate the soil seed bank and seedling regeneration characteristics of Amygdalus ledebouriana in Xinjiang, and to explore the limiting factors affecting the population regeneration of A . ledebouriana. [Methods] A . ledebouriana in the Ta􀆳e Basin of Xinjiang was used as the research object, and the soil seed bank and seedling regeneration were studied by means of field plot investigation, soil sample collection, and seedling number and grade statistics under the mother plant. [Results] (1) The average density of seeds in the soil seed bank of A . ledebouriana was 96.45 m2. The complete seed density of the Tuoli population was the highest, and the density of seeds eaten by the Yumin population was the highest, while the insect-eaten seeds only appeared in the Tacheng population. (2) The seeds of A . ledebouriana were mainly distributed in the litter layer, accounting for 56.29% of the total seeds, S2 (0-5 cm) soil layer accounted for 29.07%, and S3 (5-10 cm) soil layer accounted for 14.65%. The horizontal diffusion distance of soil seeds was proportional to the slope of A . ledebouriana. (3) No seedlings were found in the investigated A . ledebouriana seedlings. Grade Ⅰ seedlings accounted for 51.12% of the total number of seedlings. A . ledebouriana seedlings were concentrated in the range of 50 cm from the base of the mother plant. [Conclusion] The distribution characteristics of soil seed bank of A . ledebouriana is near the mother plant and the surface, and the characteristics of seedling regeneration is also near the mother plant distribution. Under natural conditions, gnawed seeds, insect-infested seeds, and niche loss are the main reasons why A . ledebouriana seedlings cannot germinate and the regeneration of seedlings is limited.

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