[Effects of N P K on yield and baicalin contents of Scutellaria baicalensis].
OBJECTIVE
To find out the effects of different levels and combinations of nitrogen, phosphorus and potassium on the growth and secondary metabolites of Scutellaria baicalensis.


METHODS
The quantities of growth, physiological indicators and baicalin contents in different fertilization treatment were calculated and compared.


RESULTS
The growth physiological indicators and baicalin contents of S. baicalensis in complex fertilization treatment were better than those in single element fertilization treatment, and nutrition balance types better than maladjustment type. The reasonebly fertilitzing in complex fertilization treatment, nitrogen could improve the fertilizer efficiency of phosphorus.


CONCLUSIONS
According to the fertilization mathematic model, the optimum fertilization dosage should be primarily defined as N: 22.6-25.0 g/m2, P: 30.6-44.6 g/m2, K: 5.4-21.4 g/m2, that is 2N:3P:1K.
Zhang
Yan
Y
Beijing University of Traditional Chinese Medicine, Beijing 100102, China. zhangyan8669@126.com
Liu
Yong
Y
Wang
Wen-quan
WQ
Wang
Ji-yong
JY
D018533:Biomass; D005308:Fertilizers; D005419:Flavonoids / Q000032:analysis* / Q000592:standards; D009584:Nitrogen / Q000494:pharmacology; D010758:Phosphorus / Q000494:pharmacology; D018517:Plant Roots / Q000737:chemistry / Q000187:drug effects / Q000254:growth & development; D010946:Plants, Medicinal / Q000737:chemistry / Q000187:drug effects / Q000254:growth & development*; D011188:Potassium / Q000494:pharmacology; D011786:Quality Control; D031364:Scutellaria baicalensis / Q000737:chemistry / Q000187:drug effects / Q000254:growth & development*
D005308:Fertilizers; D005419:Flavonoids; D010758:Phosphorus; C038044:baicalin; D009584:Nitrogen; D011188:Potassium