title: [Ecology suitability of Polygonum capitatum in Guizhou province based on topographical conditions].
abstract: OBJECTIVE
  To study ecology suitability rank dividing of Polygonum capitatum for selecting artificial planting base and high-quality industrial raw material in Guizhou province.
  
  
  METHODS
  Based on the investigation of PCB and DEM data of Guizhou province, the relationship between the gallic acid content in P. capitatum and topographical conditions was analyzed by statistical analysis. The geographic information systems (GIS)-based assessment and landscape ecological principles were applied to assess ecology suitability areas of P. capitatum in Guizhou.
  
  
  CONCLUSIONS
  slope, aspect and altitude are main topographical factors that affect the content of gallic acid in P. capitatum. The gallic acid content of P. capitatum is higher in the lower altitude, shady slope and smaller slope areas. The gallic acid content is higher in the eastern areas of Guizhou province.
authors.affiliation: Institute of Chinese Material Medical, China Academy of Chinese Medical Sciences, Beijing 100700, China.
authors.forename: Xiaobo
authors.initials: X
authors.lastname: Zhang
authors.forename: Tao
authors.initials: T
authors.lastname: Zhou
authors.forename: Lanping
authors.initials: L
authors.lastname: Guo
authors.forename: Shoudong
authors.initials: S
authors.lastname: Zhu
authors.forename: Luqi
authors.initials: L
authors.lastname: Huang
mesh_terms: D000220:Adaptation, Biological; D002681:China; D004463:Ecology; D005707:Gallic Acid / Q000032:analysis; D040362:Geographic Information Systems; D028502:Polygonum / Q000737:chemistry / Q000502:physiology*; D019371:Topography, Medical
chemical_list: D005707:Gallic Acid