[Effects of fertilizing levels on output and quality of Pinellia ternate].

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