@phdthesis{oai:iwate-u.repo.nii.ac.jp:00009499,
 author = {髙橋, 秀子},
 month = {},
 note = {Soil contaminated with cadmium (Cd) is a heavy problem all over the world and especially in Japan, where many crop fields are contaminated. Applicative techniques are required for remediation such soils and reduction of Cd uptake in crops.  To evaluate the Cd uptake of taro (Colocasia esculenta Schott cv. Dodare), Japanese radish (Raphanus sativus L. cv. Harunomegumi) and potato (Solanum tuberosum L. cv. Dansyaku) a cultivation experiment was conducted in high Ca-contaminated field. The Ca concentration of the whole plants showed in the order of taro > potato > Japanese radish. In addition, the Cd concentration of the edible parts (daughter corm of taro, Japanese radish root and peeled potato) in each plant was the lowest in those of the other parts. The shoots of Japanese radish and potato accumulated Cd largely as compared with roots during the cultivation. It is concluded that the edible part of Japanese radish root is a safer food material with low cadmium content as compared with the other root crops. The experiment of pot culture was conducted to investigate the Cd, zinc, manganese and copper concentrations of Japanese radishes (Raphanus sativus L. cv. Harunomegumi, and Raphanus sativus L. cv. Akibutai) for 9 weeks with soil, whose cadmium and Zinc concentrations were 3.26 and 67.9 mg/kg (in dried soil), respectively. The Japanese radish plants grew normally through the growth period, and the weight of the shoots was 2.8 times of the roots. The Cd concentrations of shoots increased for 6 weeks after sowing and the increase slowed down after 6 weeks from sowing. After 9 weeks, the cadmium concentrations of the shoots were "Harunomegumi" and “Akibutai”, respectively, 2.37 and 1.45 mg/kg. The cadmium concentrations of the shoot “Harunomegumu” were higher 0.8 kg kg-1 than those of "Akibutai". It seemed that the Cd concentrations of the shoots depended on the cultivars. The Cd concentrations of the roots were a quarter of those of the shoots. The zinc concentrations of the shoots were same as those of the roots through the growth period. The manganese concentrations of the shoots increased, however, those of the roots were constant values. The copper concentrations of the shoots were higher 1.4 times than those of the roots. To evaluate the suppressive effect of five additives on cadmium (Cd) uptake by komatsuna (Brassica rapa L. var. perviridis cv. Early komatsuna), a pot experiment with Cd-contaminated acidic soil was conducted in a greenhouse. Autoclaved lightweight aerated concrete (ALC), lherzolite (Lherzo), gypsum made from waste plasterboard (Gyp-w), magnesia cement (Magwhite) and calcium carbonate containing less than 10% pure gypsum (Cacar-G) were added to the soil (1%, w/v). The shoot Cd concentrations of the plants were suppressed in the order; Magwhite ≧ Cacar-G > ALC > Lherzo. The order was in agreement with that of the soil pH increased by the application of the additives. The application of Gyp-w suppressed the shoot Cd concentration of the plants similar to Lherzo, however, it reduced the plant growth. It is concluded that Magwhite and Cacar-G are considerably effective soil amendments in the suppression of Cd uptake by the plants, and ALC and Lherzo are moderately effective, whereas Gyp-w is scarcely effective. The development of soil amendments, the improvement of cultivation techniques on the reduction of plant Cd uptake, and the phytoremediation on Cd contaminated soil will propose the avoidance of Cd crisis.},
 school = {岩手大学},
 title = {コマツナおよび根菜類等のカドミウム吸収の特性},
 year = {2010}
}