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KMID : 0903619940350020103
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Journal of the Korean Society for Horticultural Science
1994 Volume.35 No. 2 p.103 ~ p.110
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Effect of Long - Term CO2 Enrichment on Growth , Yield and Quality in Tomato
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Abstract
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The tomato plant (Lycopersicon esculentum Mill cv. Kwangsu) was acclimated with long-term CO₂ enrichment of 800 ppm and 2400 ppm in a controlled cultivation. This plant was studied to better understand the growth response in the field and laboratory from 1987 to 1989. Total leaf area and shoot growth of the tomato plant increased more in the CO₂ 800 ppm-enriched plants than in the CO₂ 2400 ppm-enriched plants and in the ambient. Root growth of the CO₂ 800 ppm-enriched plants significantly increased at 30 days. but sharply decreased 60 days after the treatment (DAT). Relative growth rates and net assimilation rates were strictly maintained in the CO₂-enriched plants until 30 DAT and then lowered below the ambient. Specific leaf area in the CO₂-enriched plants was lower than the control and gradually declined as plants developed further. Marketable yield of tomatoes in the first two clusters increased to 46.4% and 33.2% in the CO₂ 800 ppm-enriched and the 2400 ppm-enriched plants, respectively. Also average fruit weight and marketable yield ratio increased tremendeously in the CO₂ 800 ppm-enriched plants. The CO₂ enrichment showed to be most effective in the early application of the yield and it significantly inhibited the puffy fruit ratio.
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