Abstract: The effects of eight nutrient solution formulas on yield and quality of hydroponic purple flowering stalk（Brassica campestris L. ssp. chinensis var. perperea Hort.）were studied. The weight，length and diameter of the flowering stalk，and the contents of soluble protein，soluble sugar，vitamin C，nitrate and cellulose were determined，in order to select the suitable nutrition formula. The results showed that：the weight of main and side stalk，leaf width and leaf length cultured from nutrient solution D were significantly higher than those of the other nutrient solution formulas. Plant heights cultured from nutrient solution A and B were significantly higher than those of the others. The nutrient solution C developed larger leaf but less bolting. The flowering stalks cultured from E and F formulas were short，basically had no bolting. The contents of vitamin C and soluble protein of the flowering stalk cultured from nutrient solution D were significantly higher than those of the others，while the contents of nitrate and cellulose were significantly lower than those of the others. The results indicated that the flowering stalk cultured from D had the best quality. The different concentration treatment of salt in the Japanese gardening balanced nutrient solution formula（A）showed that once the nutrient solution concentration was too high，the nitrate content of the flowering stalk would be significantly increased，while the nutrient solution concentration was too low，the plant height and bolting were less.

Key words: purple flowering stalk, hydroponics, nutrient solution formula, yield index, quality index