title: [Age structure and biomass accumulation of Acanthopanax giraldii population in west Sichuan plateau].
abstract: OBJECTIVE
  To study age structure and medicinal parts biomass accumulation of Acanthopanax giraldii population in West Sichuan Plateau.
  
  
  METHODS
  The methods of plant population ecology were applied to the study. The ramets of A. giraldii were collected in sample plot, survey the age, height, basal diameter and biomass of ramets,and also survey the number,stem bark height and length of the one-year-shoot growing in clonal ramets. Then statistically analyzed the survey data.
  
  
  RESULTS
  The article revealed growth rule of A. giraldii population. The mortality rate of clonal ramets reached a peak after six years growth. The power exponential fuction could reflect the correlation of age to the height, basal diameter and biomass of ramets. The production of medicinal parts was stable between two to six years growth of clonal ramets.
  
  
  CONCLUSIONS
  Suggested to harvest medicinal parts after three years growth of the clonal ramets. The study could provide biologic basis to population management and sustainable harvest of A. giraldii.
authors.affiliation: Ethnomidicine School of Chengdu University of Traditional Chinese Medicine, Chengdu 611131, China. raingu_80413@sina.com
authors.forename: Rui
authors.initials: R
authors.lastname: Gu
authors.forename: Shihong
authors.initials: S
authors.lastname: Zhong
authors.forename: Biao
authors.initials: B
authors.lastname: He
authors.forename: Guihong
authors.initials: G
authors.lastname: Li
authors.forename: Muxia
authors.initials: M
authors.lastname: Keri
mesh_terms: D018533:Biomass; D017753:Ecosystem; D028001:Eleutherococcus / Q000737:chemistry / Q000254:growth & development*; D010936:Plant Extracts / Q000032:analysis; D013997:Time Factors
chemical_list: D010936:Plant Extracts