数種葉菜類および根菜類の生育とカドミウム吸収に及ぼすカキ殻施用の効果 : 園芸用培養土を用いた土耕ポット試験

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It is said that the application of alkaline material is an effective method for suppressing absorption of Cd in soil by plants.Since the main ingredient of oyster shells is calcium carbonate, it seems that the application of oyster shells is effective forthis purpose, but there are many points which are not understood about this effect. In this study, the effects of applicationsof calcium carbonate or oyster shells on the growth and absorption of Cd in several species of leafy or root vegetables wereinvestigated in pot culture experiment using commercially available gardening compost as soil with low Cd leve(l total Cd ; 0.16μg g^-1). In leafy vegetables, growth of leaves and stems was 6.2 g plant^-1, 5.6 g plant^-1 and 4.2 g plant^-1 with calcium carbonate, oystershell groups and control of Japanese mustard spinach, respectively, showing significantly higher values than that of control.However, significant difference was not observed in cabbage, potherb mustard, and crown daisy. On the other hand, in rootvegetables, growth of root was 0.93 g plant^-1 in calcium carbonate group in carrot, showing significantly higher value than 0.51-0.54 g plant^-1 of control or oyster shell groups. However, no significant difference was observed among the treatment groups inJapanese radish. With oyster shell, turnip showed significantly lower growth than that of control. In leafy vegetables, Cd concentration of leaves and stems were 0.08-0.11μg g^-1 dry matter (DM) in calcium carbonateand oyster shell groups of Japanese mustard spinach, potherb mustard, and crown daisy, showing significant lower levelsthan those of 0.13-0.14μg g^-1 DM of control. However, no significant difference was observed between the treatments withcalcium carbonate and oyster shell. In addition, no significant differences were observed in cabbage. In root vegetables, Cdconcentration were 0.28-0.32 μg g^-1 DM in calcium carbonate and oyster shell groups of Japanese radish, showing significantlylower levels than 0.48μg g^-1 DM of control. However, no significant difference was seen between the calcium carbonate andoyster shell groups. Calcium carbonate group of turnip showed 0.21μg g^-1 DM, significantly lower than 0.38μg g^-1 DM of control.Carrot showed no significant differences among the treatments.
帝京科学大学の論文
2013-03-31

数種葉菜類および根菜類の生育とカドミウム吸収に及ぼすカキ殻施用の効果 : 園芸用培養土を用いた土耕ポット試験

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