title: [Effect of N, P, K on rhizome yield and diosgenin content of Dioscorea zingiberensis].
abstract: OBJECTIVE
  A field experiment was conducted to investigate the different effects of various applying ratios of nitrogen (N), potassium (K) and phosphate (P) on diosgenin content and Rhizoma yield of Dioscorea zingiberensis.
  
  
  METHODS
  Experiment was conducted with both one factor and orthogonal design, and data was analyzed statistically on SPSS 11. 5.
  
  
  RESULTS
  Compared with the control groups,the yield of rhizome was significantly increased by N (P < 0.01), K (P < 0.01) , P (P <0.05). The content of diosgenin has no obvious increase (P > 0.05) by individual application of N, P and K, while changed significantly (P < 0.05) by the combination of proper levels of N, P, K.
  
  
  CONCLUSIONS
  The degree of effect on diosgenin content was ranged with N > K > P, while on output of dioscorea rhizome was K > N > P, and the combination of N, K, P2 was superior to others.
authors.affiliation: College of Life Sciences, Nanjing Normal University, Nanjing.
authors.forename: Wang
authors.initials: W
authors.lastname: Jian' an
authors.forename: Xu
authors.initials: X
authors.lastname: Zenglai
authors.forename: Wu
authors.initials: W
authors.lastname: Guorong
authors.forename: Chen
authors.initials: C
authors.lastname: Chongming
authors.forename: Wang
authors.initials: W
authors.lastname: Xida
authors.forename: Ding
authors.initials: D
authors.lastname: Zhizun
authors.forename: Chen
authors.initials: C
authors.lastname: Jingyao
authors.forename: Shi
authors.initials: S
authors.lastname: Yunyun
mesh_terms: D027742:Dioscorea / Q000737:chemistry* / Q000145:classification / Q000254:growth & development*; D004144:Diosgenin / Q000032:analysis* / Q000302:isolation & purification; D005308:Fertilizers; D009584:Nitrogen; D010710:Phosphates; D010946:Plants, Medicinal / Q000737:chemistry / Q000145:classification / Q000254:growth & development*; D011188:Potassium; D027343:Rhizome / Q000737:chemistry / Q000254:growth & development
chemical_list: D005308:Fertilizers; D010710:Phosphates; D004144:Diosgenin; D009584:Nitrogen; D011188:Potassium