Effects of different light quality on the growth and quality of pea sprouts

The effects of different light-emitting diodes ( LEDs) light quality (white (CK), 8R1B(T1), 6R3B(T2) and 6R2G1B (T3)) on the growth and quality of pea sprouts were studied. . The results showed that, compared to CK, the growth of pea sprouts were improved in 3 treatments and the best treatment is T3. The fresh weight and dry weight of sprouts in T3 treatment increased by 28.02%, 33.85%, respectively, and the hypocotyl length of sprouts in T3 increased by 27.50%. Nitrate contents of sprouts in these treatments were as follow : T1>T3>CK>T2 and far below the standard limit of nitrate in vegetables in China. The contents of vitamin C and carotenoid of sprouts in 3 treatments were significantly higher than CK. The contents of soluble protein and flavonoid increased in T3 treatment. In general, compared to CK, 3 treatments could increase the yield and improve the quality of pea sprouts, and T3 was the best treatment.