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| Effects of Different Light Quality of Red，Blue and Green LED on Quality of Watermelon and Muskmelon Seedlings |
| LI Fenghua1 ☆，JIE Yuanfen2 ☆，WU Guoxiu1，XU Qiaoqiao1，LI Yanman1，LI Yang1，ZHANG Jiazi1，LI Shengli1* |
| 1College of Horticulture，Henan Agricultural University，Zhengzhou 450002，Henan，China；2Henan Vocational College of Agriculture，Zhengzhou 451450，Henan，China |
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Abstract In order to explore the effects of different light quality on watermelon and muskmelon seedling quality，this experiment took watermelon variety‘Tianwang 50’and muskmelon variety‘Qingxiu No.2’ as test materials，grew them in light incubator and taking white light as the contrast（CK）．Then，the experiment analyzed the effects of combination light of R4B1，R6B1，R4B1G1 and R6B1G1 with 4 different ratio treatments on seedling growth．The results showed that comparing with the CK，combination light had promoted the growth of watermelon and muskmelon seedlings，red and blue light significantly accelerated the growth of watermelon seedlings，and red，blue and green light significantly enhanced the growth of muskmelon seedlings．The best light quality combinations for watermelon and muskmelon seedlings were R6B1 and R4B1G1，respectively．R6B1 and R4B1G1 treatments could effectively improve the morphological indexes，including plant height，stem diameter，leaf area，root system growth and matter accumulation，and physiological and biochemical indexes such as leaf photosynthetic pigment content，soluble sugar content and root system activity，etc．Those were all helpful to substance accumulation of seedlings and then achieving the effect of strong seedlings．
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Received: 23 December 2021
Published: 05 May 2022
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