[Effects of fertilizing levels on output and quality of Pinellia ternate].
OBJECTIVE
To compare the effects of the different fertilizing levels on the output, the effective element, the content of heavy-metal, the grade and the ratio of wet to dry of Pinella ternate to obtain the best fertilize ratio on the planting.


METHODS
The orthogonal desing method L9 (3(4)) was applied on the comparison between the different fertilization levels. The content of alkaloid was determined by UV spectrophotometer. The content of heavy-metal was determined by atom absorption.


RESULTS
The factors that affected the output and the quality of Pinellia ternate were N > P > K.


CONCLUSIONS
The best fertilizer combination is N 25 g/m2 ,P2O5 18 g/m2, K2O9 g/m2 and the application ratio is 2. 8: 2: 1 for them, in which the higher output and the content of alkaloid should be obtained.
Chen
Zhong-Jian
ZJ
Wenshan Prefecture Sanqi Science and Technology Research Institute, Wenshan 663000, China.
Sun
Yu-Qin
YQ
Zhao
Xiong-Ting
XT
Wang
Bing-Yan
BY
Huang
Tian-Wei
TW
Duan
Cheng-Li
CL
D000470:Alkaloids / Q000032:analysis*; D005308:Fertilizers; D019216:Metals, Heavy / Q000032:analysis*; D009584:Nitrogen; D010758:Phosphorus; D030021:Pinellia / Q000737:chemistry* / Q000254:growth & development; D010946:Plants, Medicinal / Q000737:chemistry* / Q000254:growth & development; D011188:Potassium; D011786:Quality Control; D013056:Spectrophotometry, Ultraviolet
D000470:Alkaloids; D005308:Fertilizers; D019216:Metals, Heavy; D010758:Phosphorus; D009584:Nitrogen; D011188:Potassium