Transfer factors of 90Sr and 137Cs from paddy soil to the rice plant in Taiwan

Plant uptake and downward migration of 85Sr and 137Cs after their deposition on to flooded rice fields: lysimeter experiments with and without the addition of KCl and lime

“…These results indicate that 85 Sr transfers to rice plants more easily than does 137 Cs but that, within the plant body, 137 Cs translocates to seeds more easily than does 85 Sr. This higher mobility of radiocesium than of radiostrontium has been reported for rice and other grain crops such as wheat and barley (Verfaillie et al, 1966;Abbazov et al, 1978;Tsumura et al, 1984;Nisbet and Shaw, 1994;Choi et al, 1995;Wang et al, 1998;Leung and Shang, 2003). The results of a field study by Tsukada et al (2002b) suggest that the 137 Cs concentration in the hulled rice seeds was about three times lower than that in the straws, which is in good agreement with the present data.…”

“…Many researchers (Myttenaere et al, 1969;Tsumura et al, 1984;Choi et al, 1991;Komamura and Tsumura, 1994;Wang et al, 1998;Choi et al, 1999;Tsukada et al, 2002a) have reported the TF m values of radiocesium and/or radiostrontium for rice. Almost nothing is reported about the TF a values for rice except for the works of Choi et al (1995); Choi et al (2002a) and Leung and Shang (2003).…”

Uptake and distribution of 90Sr and stable Sr in rice plants

“…Therefore, the transfer factor of stable Sr may be lower than that of 90 Sr. Komamura and Tsumura (1994) reported that the arithmetic mean of the TF value for 90 Sr in polished rice, corrected on a dry weight basis (assumed 12% water content), was 0.0043 and the reported value was in agreement with the observed values in the present study. Another reported TF value for 90 Sr in Taiwan was 0.037 (Wang et al, 1998), which was one order of magnitude higher than the present observation. This might be attributed to the differences in soil types, soil management, cultivation methods, weather conditions and especially the sampling periods.…”

“…This might be attributed to the differences in soil types, soil management, cultivation methods, weather conditions and especially the sampling periods. Sampling periods reported by Wang et al (1998) in Taiwan were carried out in 1981, when there was still a higher deposition level of fallout 90 Sr derived from the 26th Chinese atmospheric nuclear weapon test in 1980. Therefore, the chemical and physical forms of 90 Sr might also be different from the present conditions.…”

Comparative analysis of distributions of radioactive cesium and potassium and stable cesium, potassium, and strontium in brown rice grains contaminated with radioactive materials released by the Fukushima Daiichi Nuclear Power Plant accident

“…The concentrations of stable Cs and K in germ are higher than in bran, while the highest concentration of Sr was detected for bran. It has been reported that the distributions of Sr and Cs are also different from each other in soybean plant and rice plant [17,18]. Figure 2 shows the correlations between the massic activity and the concentration of the element for 137 Cs and 134 Cs in the components of brown rice.…”