title: [Effects of formula fertilization to yield and content on polysaccharide of Isatis indigotica].
abstract: OBJECTIVE
  To select the optimum formula fertilization of Isatis indigotica through analyzing the yield and contents of polysaccharide of Radix Isatis for different treatments.
  
  
  METHODS
  An orthogonal experiment design on the basis of three factors and four levels was applied for studying the effect of formula fertilization on yield. The contents of polysaccharides were determined with phenol-witriolic colorimetry.
  
  
  RESULTS
  The optimum formula fertilization of Radix Isatis was carbamide 869.0 kg x hm(-2), superphosphate 1 428.6 kg x hm(-2) and potassium sulfate 0 kg x hm(-2).
  
  
  CONCLUSIONS
  Superphosphate can observably influence the yields of Radix Inditis. while carbamide influence the contents of polysaccharide of Radix Inditis.
authors.affiliation: College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China. njwkc2002@126.com
authors.forename: Kang-Cai
authors.initials: KC
authors.lastname: Wang
authors.forename: Xiao-Qing
authors.initials: XQ
authors.lastname: Tang
authors.forename: Jian
authors.initials: J
authors.lastname: Wu
authors.forename: Li-Ping
authors.initials: LP
authors.lastname: Sun
mesh_terms: D018533:Biomass; D011756:Diphosphates; D005308:Fertilizers; D031219:Isatis / Q000737:chemistry / Q000254:growth & development; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry / Q000254:growth & development; D011134:Polysaccharides / Q000032:analysis*; D013431:Sulfates; D014508:Urea
chemical_list: D011756:Diphosphates; D005308:Fertilizers; D011134:Polysaccharides; D013431:Sulfates; C031512:potassium sulfate; C033414:superphosphate; D014508:Urea