Effect of Nitrogen Fertilizer on the Growth and Antioxidant Activities of Prunella vulgaris and Campanula takesimana

Abstract

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.