Chin J Plant Ecol ›› 2023, Vol. 47 ›› Issue (7): 967-977.DOI: 10.17521/cjpe.2022.0396

• Research Articles • Previous Articles     Next Articles

Age structure and dynamic analysis of Amygdalus ledebouriana population in Xinjiang, China

GUAN Yue, WANG Yan-Xin, CHU Jia-Yao, FENG Lin-Jiao, SONG Xiao-Meng, ZHOU Long()   

  1. College of Horticulture, Xinjiang Agricultural University, Ürümqi 830052, China
  • Received:2022-10-08 Accepted:2023-02-08 Online:2023-07-20 Published:2023-07-21
  • Contact: *ZHOU Long(
  • Supported by:
    The Key R&D Program of Ministry of Science and Technology of China(2016YFC0501501);Special R&D Project of Forestry and Grassland Administration of Xinjiang Uggur Autonomous Region(XJFG202003)


Aims Taking the population of Amygdalus ledebouriana in Balruk Mountain of Xinjiang as the research object, through the investigation of the natural population of A. ledebouriana in Xinjiang, and to provide a certain theory and research basis for the conservation, management and restoration of A. ledebourianapopulation.

Methods The population of A. ledebouriana was investigated and counted by typical sample method. The static life table of A. ledebourianapopulation was compiled using “space substitution time” and uniform sliding technologies, and thus the dynamic change of the population number was analyzed.

Important findings 1) The number of individuals in the III age class of A. ledebourianapopulation in Xinjiang was the largest, accounting for 19.19% of the total individual number. The number of individual plants in the population increased first and then decreased with the increase of age class. The diameter class structure of the population was “spindle”. The age structure of A. ledebourianapopulation in Xinjiang belongs to the recession type. 2) The survival curve of A. ledebouriana was close to the distribution of Deevey-II, and the death peak of the population appeared in the VIII age class, with a mortality rate of 58%. 3) Dynamic change index (Vpi), dynamic change index under external disturbance (Vpi) of A. ledebouriana population > 0, but V'pi was close to 0, and the maximum risk probability in random disturbance (Pmax) of the population under external environmental interference was 0.38%, indicating that the growth trend of the population was not obvious when it was randomly disturbed by the outside world. 4) After 2, 3, 4, 5, 6, 7, 8, 9 and 10 age classes in the future, the number of young and middle-aged individuals gradually decreases, and the elderly individuals dominate. The lack of seedlings in young individuals is one of the main reasons for the decline of A. ledebouriana population in Xinjiang. Therefore, in order to ensure the normal regeneration of A. ledebouriana population, it is very important to adopt some valid measures, for example, increase the research in the regeneration of A. ledebouriana seedlings in the future, including properly carrying out artificial tending, and protect the A. ledebouriana population by closing the mountains and raising forests in Xinjiang.

Key words: Amygdalus ledebouriana, population age structure, static life table, survival curve, dynamic analysis