Effects of Different Light Emitting Diodes on Growth and Quality of Lettuce
The study investigated the effects on growth and quality of lettuce under six light treatments: yel ow LED (Y) , green LED (G), red LED (R), blue LED (B) and the red plus blue light (R∶B=3∶1) by dysprosium lamp as control (CK). The re-sults showed that: under combination of red light and blue light, the fresh weight and dry weight were the largest, and the second was blue light treatment. Com-pared with the control, blue light and red plus blue light significantly enhanced the contents of soluble sugar, soluble protein, free amino acid and vitamin C. The study also showed that, red plus blue light significantly improved activity of nitrate reduc-tase and glutamine synthetase in lettuce leaves, which reduced the contents of ni-trate and nitrite and improved the safety effectively.
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万方数据
维普
