The Effects of Radioactive Contamination on the Forestry Industry and Commercial Mushroom-Log Production in Fukushima, Japan

Miura, Satoru

doi:10.1007/978-4-431-55828-6_12

Cited by 16 publications

(9 citation statements)

References 12 publications

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“…In all tree species, the sapwood and some heartwood samples showed radiocesium contamination. The general trend of the radiocesium distribution in the aboveground parts of standing trees was similar to that in Fukushima Prefecture (Kaneko and Tsuboyama 2012;Koarashi et al 2012;Kuroda et al 2013;Masumori et al 2015a, b;Miura 2015;Ohashi et al 2014;Ohte et al 2015) (Figs. 17.4 and 17.5).…”

Section: Radiocesium Contamination In Forest Trees and Soil In The Wisupporting

confidence: 73%

Agricultural Implications of the Fukushima Nuclear Accident (III)

Nakanishi¹,

O’Brien²,

Tanoi³

2019

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Section: Radiocesium Contamination In Forest Trees and Soil In The Wisupporting

confidence: 73%

Agricultural Implications of the Fukushima Nuclear Accident (III)

Nakanishi¹,

O’Brien²,

Tanoi³

2019

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“…In this context, the purpose of this research was to assess the prospect of resuming mushroom-log production in contaminated areas of Fukushima. Forest contamination was investigated in three areas (A, B, C) in Tamura city in collaboration with the Fukushima Chuo Forest Cooperative (Miura 2016), located about 20 km from the Fukushima Daiichi nuclear power plant ( Fig. 11.1).…”

Section: Objective and Research Fieldmentioning

confidence: 99%

Radiocesium Contamination in Forests and the Current Situation of Growing Oak Trees for Mushroom Logs

Kobayashi

Ito

Masumori

2019

Agricultural Implications of the Fukushima Nuclear Accident (III)

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The radiocesium contamination in mushrooms and in mushroom logs is a matter of concern for the forestry industry. To know the contamination situation precisely and the future for mushroom log production, the 137 Cs distribution in six fields cultivating oak trees in Tamura city, Fukushima, was investigated in 2015. The 137 Cs concentration in new branches was found to correlate with that in the wood. This result suggests that the 137 Cs concentration in tree trunks could be estimated without felling based on the 137 Cs concentration in new branches. In addition, trees grown in one of the six fields was found to have very low 137 Cs concentration even though the concentration of 137 Cs in the soil was high. The impact of the nutritional conditions on the 137 Cs absorption in the oak seedlings grown hydroponically was also investigated by a radiotracer experiment.

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“…Over 25 million logs are used annually for shiitake mushroom (Lentinula edodes) production in Japan (Ministry of Agriculture, Forestry & Fisheries, 2017). Prior to the nuclear reactor accident at the Fukushima Daiichi Nuclear Power Plant in 2011, Fukushima prefecture was a major source of trees used for shiitake log-cultivation (Miura, 2016). As a result of the accident, the Japanese government restricted radiocesium ( 134 Cs and 137 Cs) in general foods, including mushrooms cultivated on logs, to ≤ 100 Bq/kg fresh weight (FW) (Ministry of Health, Labour and Welfare, 2012).…”

Section: Introductionmentioning

confidence: 99%

Peer Review #2 of "Efficient sampling of shiitake-inoculated oak logs to determine the log-to-mushroom transfer factor of stable cesium (v0.1)"

Dighton¹

2019

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Background. Stable cesium (133 Cs) naturally exists in the environment whereas recently deposited radionuclides (e.g., 137 Cs) are not at equilibrium. Stable cesium has been used to understand the long-term behavior of radionuclides in plants, trees and mushrooms. We are interested in using 133 Cs to predict the future transfer factor (TF) of radiocesium from contaminated logs to shiitake mushrooms in Eastern Japan. However, the current methodology to obtain a representative wood sample for 133 Cs analysis involves mechanically breaking and milling the entire log (excluding bark) to a powder prior to analysis. In the current study, we investigated if sawdust obtained from cutting a log along its length at eight points is as robust but a faster alternative to provide a representative wood sample to determine the TF of 133 Cs between logs and shiitake. Methods. Oak logs with ready-to-harvest shiitake fruiting bodies were cut into nine 10-cm discs and each disc was separated into bark, sapwood and heartwood and the concentration of 133 Cs was measured in the bark, sapwood, heartwood, sawdust (generated from cutting each disc) and fruiting bodies (collected separately from each individual disc), and the wood-toshiitake transfer factor (TF) was calculated. Results. We found that the sawdust-toshiitake TF of 133 Cs did not differ (P = 0.223) compared to either the sapwood-to-shiitake TF or heartwood-to-shiitake TF, but bark did have a higher concentration of 133 Cs (P < 0.05) compared to sapwood and heartwood. Stable cesium concentration in sawdust and fruiting bodies collected along the length of the logs did not differ (P > 0.05). Discussion. Sawdust can be used as an alternative to determine the log-to-shiitake TF of 133 Cs. To satisfy the goals of different studies and professionals, we have described two sampling methodologies (Methods I and II) in this paper. In Method I, a composite of eight sawdust samples collected from a log can be used to provide a representative whole-log sample

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The Effects of Radioactive Contamination on the Forestry Industry and Commercial Mushroom-Log Production in Fukushima, Japan

Cited by 16 publications

References 12 publications

Agricultural Implications of the Fukushima Nuclear Accident (III)

Agricultural Implications of the Fukushima Nuclear Accident (III)

Radiocesium Contamination in Forests and the Current Situation of Growing Oak Trees for Mushroom Logs

Peer Review #2 of "Efficient sampling of shiitake-inoculated oak logs to determine the log-to-mushroom transfer factor of stable cesium (v0.1)"

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