title: [A study on bark quality of Magnolia officinalis Rehd. et Wils].
abstract: OBJECTIVE
  To understand the main factors influencing the bark quality of Magnolia officinalis so as to theoretically establish a basis for quality assessment, genetic improvement and layout of bark producing areas.
  
  
  METHODS
  Eighty-two samples from the main bark producing areas(11 counties of 7 provinces such as Zhejiang, Fujian, Sichuan, Hunan, Guangxi, Jiangxi and Hubei) were collected. Totally there were 121 samples, including 39 from the trial stand located in Jingning of Zhejiang the obtained out of the seeds from the bark producing areas mentioned above. HPLC was used in the analysis of phenols contained in the bark of Magnolia officinalis.
  
  
  RESULTS
  The main factors influencing the bark quality have been made clear.
  
  
  CONCLUSIONS
  The quality is affected by provenance, leaf shape, DBH, tree height, crown size, age, bark thickness color of bark powder, oiliness, grounding nature, bark type, position of sampling, etc., of which provenance, leaf shape, powder color, bark thickness and DBH are the most influential factors. These factors should be fully considered when making quality assessment and genetic improvement of the bark of Magnolia officinalis.
authors.affiliation: Science Commission of Jingning County, Zhejiang Province, Jingning, Zheijiang 323500, Zheijiang, China.
authors.forename: J P
authors.initials: JP
authors.lastname: Si
authors.forename: Z K
authors.initials: ZK
authors.lastname: Tong
authors.forename: Y R
authors.initials: YR
authors.lastname: Zeng
mesh_terms: D001713:Biphenyl Compounds / Q000032:analysis*; D017705:Lignans; D031566:Magnolia / Q000033:anatomy & histology / Q000737:chemistry*; D024301:Plant Bark / Q000033:anatomy & histology / Q000737:chemistry; D010946:Plants, Medicinal / Q000033:anatomy & histology / Q000737:chemistry*; D011786:Quality Control; D000498:Allyl Compounds; D010636:Phenols
chemical_list: D001713:Biphenyl Compounds; D017705:Lignans; C005498:magnolol; C005499:honokiol; D000498:Allyl Compounds; D010636:Phenols