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The relations of the growth responses of plants, i.e. 4 species of crops, 12 species of roadside trees and 5 species of horticultural plants to cadmium (Cd) to which added soil were studied in pot culture. Growth in dry weight of corn, soybean, barley and wheat plant were decreased with increase of Cd concentration. Damage of corn plant caused by Cd treatment was more or less recovered when it was grown in soil with calcium, but that of other three crops was not recovered when it was with calcium. Although crop plants used here absorbed small amount of Cd through root, Cd content in the shoot was directly proportionate to the concentration of Cd treated to soil. Additions of calcium and sulfur to soil were effectively to change of soil pH, and only of calcium increased exchangeable calcium and cation exchange capacity of its soil. The chlorosis on leaves caused by Cd treatment was observed in 2 species such as Euonymus japonica and Rhododendron yedoense out of 5 species of the horticultural plants, especially at 50ppm of Cd concentration, Euonymus japonica occurred symptoms of chlorosis and difoliation, and at the higher concentration than that the symtoms were sever more and more. At 200 ppm of Cd feeble damage was observed in Pinus koraiensis and Ginkgo biloba but severe chlorosis observed in Robinia pseudoacacia and Sabina chinensis, Buxus koreana, Abies holophylla and Platanus orientalis. Nevertheless those plants had serious damage at 200 ppm of Cd, such symptom was weakened by adding calcium to soil with Cd. There were many Cd tolerant species out of the plants used in thies xperiment, such as Crassula falcata, Chrysanthemum morfolium, Hibiscus syriacus, Ligustrum ovalifolium, Liriodendron tulipeferia, Lespedeza crytobotrys.
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