title: [Dynamic change of phenolic acids in soils around rhizosphere of replanted Rehmannia glutinosa].
abstract: OBJECTIVE
  To determine 5 phenolic acids in the soils around rhizosphere of Rehmannia glutinosa in the field under normal rotation and successive cropping.
  
  
  METHODS
  Phenolic acids related to allelopathy effect in the soils around rhizosphere of R. glutinosa were determined by HPLC.
  
  
  RESULTS
  The growth of R. glutinosa under normal rotation was strong. During harvest, the dry weight of the root tube and the volume of the R. glutinosa under normal rotation were 6.02 and 7.71 times of the ones under successive cropping.
  
  
  CONCLUSIONS
  The seeding stage and elongating stage are the crucial periods for the autotoxic effect of the R. glutinosa under continuous cropping. During these periods, the content of coumaric acid, 4-hydroxybenzoic acid, syringic acid, and ferulic acid of R. glutinosa under successive cropping are notably negative correlation with the growth of the leaf and root tuber of R. glutinosa under successive cropping. Among them, ferulic acid plays a major role in the restriction effect on R. glutinosa under successive cropping.
authors.affiliation: Institute of Chinese Medicinal Materials, Henan Agricultural University, Zhengzhou 450002, China.
authors.forename: Jiafang
authors.initials: J
authors.lastname: Du
authors.forename: Wenjia
authors.initials: W
authors.lastname: Yin
authors.forename: Juan
authors.initials: J
authors.lastname: Li
authors.forename: Zhongyi
authors.initials: Z
authors.lastname: Zhang
mesh_terms: D002851:Chromatography, High Pressure Liquid; D003373:Coumaric Acids / Q000032:analysis / Q000378:metabolism / Q000633:toxicity; D005707:Gallic Acid / Q000031:analogs & derivatives / Q000032:analysis / Q000378:metabolism / Q000633:toxicity; D062385:Hydroxybenzoates / Q000032:analysis* / Q000378:metabolism / Q000633:toxicity; D018515:Plant Leaves / Q000187:drug effects / Q000254:growth & development; D018517:Plant Roots / Q000187:drug effects / Q000254:growth & development; D032267:Rehmannia / Q000187:drug effects / Q000254:growth & development* / Q000378:metabolism; D012987:Soil / Q000032:analysis*
chemical_list: D003373:Coumaric Acids; D062385:Hydroxybenzoates; D012987:Soil; D005707:Gallic Acid; C004999:ferulic acid; C001945:syringic acid; C017616:phenolic acid