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KMID : 0903619940350050415
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Journal of the Korean Society for Horticultural Science
1994 Volume.35 No. 5 p.415 ~ p.420
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Effect of Nitrogen Concentration in the Nutrient Solution During the First 20 Days After Planting on the Growth and Fruit Yield of Tomato Plants
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Abstract
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Tomato plants (Lycopersicon esculentum Mill cv. Ogatazuiko) were grown in the nutrient solution at 5 levels of nitrogen concentration (1∼16 me /ℓ) during the first 20 days after planting. The highest total dry weight was obtained at 8 and 16 me N through their whole life cycle. No effects of N level were found on root growth and total number of fruit, while shoot growth was significantly curved as the N level decreased. The maximum fruit yield was achieved at 4∼16 me N, whereas the plant grown at 1 and 2 me N showed poor fruit production and Ca deficiency symptoms in fruit on the 1st truss. No con-elation was found between leaf nutrient concentration and N level in the nutrient solution except for N and Ca concentration in leaf of 1∼4 me N which was temporarily decreased at 20 days after planting. The experiment showed that it is possible to control excessive vegetative growth without the loss of fruit yield by the use of 4 me N of nutrient solution during the first 20 days after planting in winter culture.
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