This research was conducted to identify the effect of nitrogen form on the growth and antioxidant activities of native plants. Prunella vulgaris and Campanula takesimana were cultivated with a ebb and flow hydroponic system and treated with 3 nitrogen forms of nutrient solution of NO3-N, NH4-N, and mixed NO3/NH4-N. The growth of Prunella vulgaris and Campanula takesimana showed the best results in nutrient solution of NO3/NH4-N. Suppling the NO3/NH4-N fertilizer increased the contents of the total flavonoids in Prunella vulgaris. Total polyphenol content and DPPH scavenging activity, and NO scavenging activity were higher in NH4-N treatment, while suppling NO3-N decreased the contents of total flavonoids and total polyphenol, and the antioxidant activities of DPPH scavenging activity and NO scavenging activity.

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