Effects of Organic Fertilizer on Bok Choy Growth and Quality in Hydroponic Cultures

Effects of corn steep liquor (organic fertilizer, OF) and conventional chemical fertilizer (CF) on the growth yield bok choy (Brassica rapa var. chinensis) in summer autumn hydroponic growing systems were compared. When OF CF applied with same amount total nitrogen cultivation, there was no significant difference between yields; however, rate slower than CF. twice (OF2), significantly inhibited likely owing to dissolved oxygen deficiency different rates nitrification absorbance by plant root. Although contents potassium, calcium, magnesium showed among three treatments both cultivation seasons, carbon/nitrogen ratio tended be higher OF2 Lower nitric acid ascorbic content found Overall, our results suggest that a comparable is expected using recipe fertilization cultivation. However, further improvement management needed