[Effect of N, P, K on rhizome yield and diosgenin content of Dioscorea zingiberensis].
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.
Jian' an
Wang
W
College of Life Sciences, Nanjing Normal University, Nanjing.
Zenglai
Xu
X
Guorong
Wu
W
Chongming
Chen
C
Xida
Wang
W
Zhizun
Ding
D
Jingyao
Chen
C
Yunyun
Shi
S
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
D005308:Fertilizers; D010710:Phosphates; D004144:Diosgenin; D009584:Nitrogen; D011188:Potassium