Objective: To investigate the effect of potassium nutrition levels on contents of ligustilide

senkyunolide A

senkyunolide H

senkyunolide I

coniferylferulate

n-butylidenephthalide and levistilide A from Angelicae Sinensis Radix in different growth periods

and provide a theoretical basis for reasonably formulating theapplication scheme of potassium fertilizer in the standardized production of Angelicae Sinensis Radix. Method: In field cultivation experiment conditions

the effects of K2O of 0 kg·hm-2 (K0)

150 kg·hm-2 (K1)

300 kg·hm-2 (K2)

450 kg·hm-2 (K3)

600 kg·hm-2 (K4) and 750 kg·hm-2 (K5) on phthalides in Angelicae Sinensis Radix were studied. The contents of the above 7 phthalides components during different growth periods in roots of Angelicae Sinensis Radix were determined by HPLC method. Result: Potassium application did not change the variation trend of phthalides constituents along with the growth period in roots of Angelicae Sinensis Radix

but different volumes of potassium fertilizer application had significant effects on the contents of phthalides components(P<0.05). Under the experimental conditions

K2O 450 kg·hm-2 had the best effect on the contents of phthalides components in Angelicae Sinensis Radix. Conclusion: The appropriate level of potassium fertilizer can increase the contents of phthalides constituents in roots of Angelicae Sinensis Radix

but did not change the overall dynamic changes trend of contents of phthalides components in the roots of Angelicae Sinensis Radix.