title: [Study on procedure of seed quality testing and seed grading scale of Phellodendron amurense].
abstract: OBJECTIVE
  To study the procedure of seed quality testing and seed grading scale of Phellodendron amurense.
  
  
  METHODS
  Seed quality testing methods were developed, which included the test of sampling, seed purity, weight per 1 000 seeds, seed moisture, seed viability and germination rate. The related data from 62 cases of seed specimens of P. amurense were analyzed by cluster analysis.
  
  
  CONCLUSIONS
  The seed quality test procedure was developed, and the seed quality grading scale was formulated.
authors.affiliation: The Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China.
authors.forename: Yanlu
authors.initials: Y
authors.lastname: Liu
authors.forename: Zhao
authors.initials: Z
authors.lastname: Zhang
authors.forename: Lingchao
authors.initials: L
authors.lastname: Dai
authors.forename: Bengang
authors.initials: B
authors.lastname: Zhang
authors.forename: Xiaoling
authors.initials: X
authors.lastname: Zhang
authors.forename: Han
authors.initials: H
authors.lastname: Wang
mesh_terms: D016000:Cluster Analysis; D018525:Germination; D032102:Phellodendron / Q000196:embryology*; D011786:Quality Control; D012639:Seeds; D014894:Weights and Measures