title: [The investigation of the licorice resources in northeast China].
abstract: OBJECTIVE
  To find out the licorice(Glycyrrhiza uralensis) distribution area, resource complexion and resource reserves of northeast China, to analyze the cause of the swing of the pendulum of resources, to put forward the countermeasure of resource protection and to provide evidence for the establishment of relative statutes.
  
  
  METHODS
  Combination of visit-inquisition and sample-square investigation involving the resource complexion of the 32 counties and cities in the northeast China wasmade.
  
  
  CONCLUSIONS
  The east distribution boundary and the whole distribution current of licorice in the northeast China were determined the northeast licorice distributing region was compartmentalized into three typical sub-regions, and the licorice population character and artificial disturbing status in main counties of every sub-region were described. The licorice reserves were also figured out. At the same time, the nature and the artificial factors that influenced the swing of the pendulum of licorice resource were analyzed, and the correlative safeguard measure was brought forward.
authors.affiliation: Resources and Environments College, Beijing Forestry University, Beijing 100083, China.
authors.forename: Ji-yong
authors.initials: JY
authors.lastname: Wang
authors.forename: Chun-sheng
authors.initials: CS
authors.lastname: Liu
authors.forename: Wen-quan
authors.initials: WQ
authors.lastname: Wang
mesh_terms: D002681:China; D003247:Conservation of Natural Resources; D017753:Ecosystem; D029882:Glycyrrhiza uralensis; D010598:Pharmacognosy; D010946:Plants, Medicinal