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KMID : 0903619990400040431
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Journal of the Korean Society for Horticultural Science
1999 Volume.40 No. 4 p.431 ~ p.435
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Effects of CO, Concentration, Light Intensity and Nutrient Level on the Growth of Leaf Lettuce in a Plant Factory
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Abstract
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We determined environmental factors reguired for optimal leaf lettuce growth (Lactuca saliva L. var. crispa cv. Grand Rapids) in a plant factory. Leaf lettuces were allowed to grown under different CO₂ concentrations, light intensities and nutrient levels in environmentally controlled room. Photosynthetic rate was increased by CO₂ enrichment and high light intensity. Growth rate was maximum at 1000 and 2000 ㎎·L^(-1) of CO₂. Under CO₂ enrichment, optimum light intensity was determined to be above 200 μ㏖·m^(-2)·s^(-1), but nutrient levels did not affect growth rate.
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