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KMID : 1024520220310050405
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Journal of the Environmental Sciences
2022 Volume.31 No. 5 p.405 ~ p.411
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Growth Responses of Red and Blue Lettuce (Lactuca sativa L.) under Different Levels of Shading for Indoor Cultivation
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Ju Jin-Hee
Kim Tae-Yeon
Yoon Yong-Han
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Abstract
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Production of lettuce under indoor cultivation is highly affected by light intensity. In this study, we used shade cloth (commercial black net) to examine the effect of these condition on growth without an associated yield penalty of container-grown lettuce. Four levels of shading treatments (0%, 35%, 55%, and 75% referred to as Cont., S35, S55, and S75 with respect to Cont.) and two lettuce varieties (red and blue) were evaluated. Variety-specific growth responses were observed with respect to different levels of shading treatments. High growth of red lettuce was occurred in Cont. treatment despite plant height and leaf length being higher than Cont. However, under 35% shading treatment blue lettuce was higher than in control plants. The highest root length was observed 0% shading (Cont.) of both varieties. These results reinforce the idea that blue lettuce is the better leafy vegetable rather than red lettuce for indoor cultivation related to lower light intensity environment conditions.
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KEYWORD
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Lettuce, Plant growth, Shading, Urban agriculture, Vegetables
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