Changes in Radionuclide Levels in Milk from the Cow Supplied with Pasture Grown in Ibaraki Prefecture, after the Accident in Fukushima Daiichi Nuclear Power Plant

Takahashi, Taro; Emoto, Yuriko; Endo, Mitsugi; Onoyama, Ichiro; Tomimatsu, Satoru; Ikeda, Masanori; Li, Toshihiro; Tanoi, Keitaro; Nakanishi, Teruyuki; Manabe, Noboru

doi:10.3769/radioisotopes.61.551

Cited by 5 publications

(4 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When cows were given haylage that was contaminated with radiocesium for 1 month after the Chernobyl nuclear power plant accident, the radiocesium Fm value in the milk was approximately 0.005 day/L (Voigt et al 1989 ;Vreman et al 1989 ;Green et al 1994 ;Fabbri et al 1994 ;Gastberger et al 2001 ;Howard et al 2001 ;Beresford et al 2000 ). In Japan, when dairy cows were raised under Japanese-style management and given contaminated haylage caused by the Fukushima Daiichi nuclear power plant accident, radiocesium Fm values were between 0.0027 and 0.0064 day/L Howard 2011 , MAFF 2011 ;Manabe et al 2011 ;Manabe 2012 ;Takahashi et al 2012 (IAEA 2005(IAEA , 2009(IAEA , 2010. In our preliminary experiment, when cows were given radiocesium contaminated haylage caused by the Fukushima Daiichi nuclear power plant accident for 5 days, the Fm value was 0.00096 day/L (Hashimoto et al 2011 ).…”

Section: Discussionmentioning

confidence: 99%

Changes in the Transfer of Fallout Radiocaesium from Pasture Harvested in Ibaraki Prefecture, Japan, to Cow Milk two Months After the Fukushima Daiichi Nuclear Power Plant Accident

Manabe

Takahashi

et al. 2013

Agricultural Implications of the Fukushima Nuclear Accident

Self Cite

View full text Add to dashboard Cite

Changes in the radioactivity of 131 I, 134 Cs, and 137 Cs in milk produced by cows given pasture that was contaminated with these radioactive nuclides caused by the Fukushima Daiichi nuclear power plant accident on 11 March 2011, were examined between 16 May and 26 June 2011. Pasture (Italian ryegrass) was seeded on September 2010, and cultivated in the Animal Resource Science Center of the University of Tokyo (about 140 km south-west of the power plant). Pasture was harvested 2 months after the accident and prepared for fermented grass forage (haylage). The cows examined were born and kept in the Animal Resource Science Center and were given commercial mixed feed (total mixed ration forage: TMR) that contained no radioactive 131 I, 134 Cs, or 137 Cs, for 2 weeks before being examined. They were given haylage and TMR (10 and 25 kg/600 kg of body weight/day, respectively) for 2 weeks, and then were given only TMR (35 kg/600 kg of body weight/day) for 2 weeks. During the examination, milk was collected twice a day and mixed in each cow. The weight and radioactivity of 131 I, 134 Cs, and 137 Cs of the mixed milk in each cow were measured daily. No radioactive 131 I was detected in either the milk or haylage. The radioactivity of 134 Cs and 137 Cs contained in the mixed feed of haylage and TMR was 380 Bq/kg (radiocesium radioactivity was represented as total concentrations of 134 Cs and 137 Cs). Radiocesium radioactivity concentrations in the milk rapidly increased to 30 Bq/kg after 4 days from the start of feeding and equilibrated to 36 Bq/kg after 12 days. After that, cows were given TMR containing no radiocesium, and radioactivity concentrations of radiocesium in the milk rapidly decreased. Two weeks after stopping radiocesium feeding, radioactivity concentrations were less than 5 Bq/kg (background level). In summary, when the cow (approximately 600 kg of body weight) was given feed with radioactive 134 Cs and 137 Cs (12,600 Bq/600 kg body weight/day), 5.71% of 134 Cs and 137 Cs was secreted into the milk (720 Bq/20 kg milk/day). Radioactivity concentrations of radiocesium in the milk were lower than new standard (50 Bq/kg) of Japan.

show abstract

Section: Discussionmentioning

confidence: 99%

Changes in the Transfer of Fallout Radiocaesium from Pasture Harvested in Ibaraki Prefecture, Japan, to Cow Milk two Months After the Fukushima Daiichi Nuclear Power Plant Accident

Manabe

Takahashi

et al. 2013

Agricultural Implications of the Fukushima Nuclear Accident

Self Cite

View full text Add to dashboard Cite

show abstract

“…This result indicated that the absorption capacity of radioactive cesium differed among individual horses. We previously reported differences in radiocesium metabolism among individual cows (Hashimoto et al 2011;Manabe 2012;Manabe et al 2011Manabe et al , 2013Manabe et al , 2014Takahashi et al 2012). These cows were given radiocesium-contaminated feed, and once the cows were removed from radiocesium-contaminated forage, radiocesium concentrations in their milk rapidly decreased.…”

Section: Discussionmentioning

confidence: 99%

“…The details of this experiment have already been reported (Hashimoto et al 2011;Manabe 2012;Manabe et al 2011Manabe et al , 2013Manabe et al , 2014Takahashi et al 2012). Changes in radiocesium levels in milk produced by cows given radiocesium contaminated feed after the nuclear accident on March 11, 2011, were examined between May 16 and June 26, 2011.…”

Section: The Effects Of "Clean Feeding" Management For Dairymentioning

confidence: 99%

“…When cows (body weights~600 kg) were given contaminated feed (12,600 Bq/600 kg body weight/day), 5.71 % of radiocesium was secreted into the milk (720 Bq/20 kg milk/day). The transfer coefficient (Fm) for the transfer of radiocesium from cow feed to milk was calculated according to the following formula: Fm (day/L) ¼ radiocesium level in milk (Bq/L)/the intake of radiocesium by each cow (Bq/cow/day) (Hashimoto et al 2011;Manabe et al 2013Manabe et al , 2014Takahashi et al 2012). The radiocesium Fm value was 0.0029 (day/L) at the highest point of radiocesium levels in the milk.…”

Section: The Effects Of "Clean Feeding" Management For Dairymentioning

confidence: 99%

See 1 more Smart Citation

Effects of “Clean Feeding” Management on Livestock Products Contaminated with Radioactive Cesium Due to the Fukushima Daiichi Nuclear Power Plant Accident

Manabe

Takahashi

Endo

et al. 2016

Agricultural Implications of the Fukushima Nuclear Accident

Self Cite

View full text Add to dashboard Cite

Contamination of food and animal products by radioactive cesium represents an important potential route of exposure in the human food chain. Therefore, following the Fukushima Daiichi nuclear power plant accident, the development of solutions for radiocesium contamination is a serious social issue in Japan. Most farm animals are kept in closed barns in Japan; this reduced the initial contamination of animal products by radioactive nuclides in the early phase of the accident. Furthermore, pigs and chickens were given imported feed that was not contaminated. However, more than 10 million tons of grass feed were needed for herbivorous livestock in Japan. We report the effects of "clean feeding" management on livestock products contaminated with radioactive cesium due to the nuclear accident. The present results concerning products from herbivores (horses, sheep, and cattle) revealed that radiocesium levels were undetectable in the meat or milk of herbivores that fed on non-contaminated feed after an initial period of consuming radiocesium-contaminated feed. Thus, we conclude that N. Manabe (*)

show abstract

Research with radiation and radioisotopes to better understand plant physiology and agricultural consequences of radioactive contamination from the Fukushima Daiichi nuclear accident

Nakanishi

2017

J Radioanal Nucl Chem

Self Cite

View full text Add to dashboard Cite

Research carried out by me and my group over the last almost four decades are summarized here. The main emphasis of my work was and continues to be on plant physiology using radiation and radioisotopes. Plants live on water and inorganic elements. In the case of water, we developed neutron imaging methods and produced 15 O-labeled water (half-life 2 min) and applied them to understand water circulation pattern in the plant. In the case of elements, we developed neutron activation analysis methods to analyze a large number of plant tissues to follow element specific distribution. Then, we developed realtime imaging system using conventional radioisotopes for the macroscopic and microscopic observation of element movement. After the accident in Fukushima Daiichi nuclear power plant, we, the academic staff of Graduate School, have been studying agricultural effects of radioactive fallout; the main results are summarized in two books published by Springer.

show abstract

Changes in Radionuclide Levels in Milk from the Cow Supplied with Pasture Grown in Ibaraki Prefecture, after the Accident in Fukushima Daiichi Nuclear Power Plant

Cited by 5 publications

References 1 publication

Changes in the Transfer of Fallout Radiocaesium from Pasture Harvested in Ibaraki Prefecture, Japan, to Cow Milk two Months After the Fukushima Daiichi Nuclear Power Plant Accident

Changes in the Transfer of Fallout Radiocaesium from Pasture Harvested in Ibaraki Prefecture, Japan, to Cow Milk two Months After the Fukushima Daiichi Nuclear Power Plant Accident

Effects of “Clean Feeding” Management on Livestock Products Contaminated with Radioactive Cesium Due to the Fukushima Daiichi Nuclear Power Plant Accident

Research with radiation and radioisotopes to better understand plant physiology and agricultural consequences of radioactive contamination from the Fukushima Daiichi nuclear accident

Contact Info

Product

Resources

About