TY - JOUR
T1 - Decontamination effects of bark washing with a high-pressure washer on peach [Prunus persica (L.) Batsch] and Japanese persimmon (Diospyros kaki Thunb.) contaminated with radiocaesium during dormancy
AU - Sato, Mamoru
AU - Abe, Kazuhiro
AU - Kikunaga, Hidetoshi
AU - Takata, Daisuke
AU - Tanoi, Keitaro
AU - Ohtsuki, Tsutomu
AU - Muramatsu, Yasuyuki
N1 - Publisher Copyright:
© 2015 The Japanese Society for Horticultural Science (JSHS), All rights reserved.
PY - 2015/10/22
Y1 - 2015/10/22
N2 - The effect of bark washing with a high-pressure washer on deciduous trees contaminated during dormancy by radiocaesium fallout derived from the Fukushima Daiichi Nuclear Power Plant accident was examined using peach [Prunus persica (L.) Batsch] and Japanese persimmon (Diospyros kaki Thunb.). Eighteen-year-old peach trees (‘Akatsuki’) were bark-washed twice with a high-pressure washer on July 5 and 27, 2011. Seven-year-old peach trees (‘Kawanakajima Hakuto’) were bark-washed on January 24, 2012, and thirty-year-old Japanese persimmon trees (‘Hachiya’) were bark-washed on December 21, 2011. For the peach trees, most of the bark was not removed by washing with a high-pressure washer. In contrast, the rough bark of Japanese persimmon was removed completely. No significant differences in the137Cs concentration of ‘Akatsuki’ fruit were found between the treatments conducted in the summer of 2011. Upon the bark washing of peach ‘Akatsuki’ trees in summer, the possibility of secondary contamination of leaves via the leachate containing137Cs was likely. The137Cs concentrations in fruits and leaves of peach ‘Kawanakajima Hakuto’ collected in summer 2012 were decreased significantly by washing treatment conducted in winter 2011-2012. In the year after treatment, the137Cs concentrations in fruits and leaves of Japanese persimmon were significantly decreased by the treatment. The effect of the bark washing on decreasing137Cs contents in fruits and leaves was greater in Japanese persimmon than in peach. The results for ‘Kawanakajima Hakuto’ and ‘Hachiya’ demonstrated the possibility of additive contamination.
AB - The effect of bark washing with a high-pressure washer on deciduous trees contaminated during dormancy by radiocaesium fallout derived from the Fukushima Daiichi Nuclear Power Plant accident was examined using peach [Prunus persica (L.) Batsch] and Japanese persimmon (Diospyros kaki Thunb.). Eighteen-year-old peach trees (‘Akatsuki’) were bark-washed twice with a high-pressure washer on July 5 and 27, 2011. Seven-year-old peach trees (‘Kawanakajima Hakuto’) were bark-washed on January 24, 2012, and thirty-year-old Japanese persimmon trees (‘Hachiya’) were bark-washed on December 21, 2011. For the peach trees, most of the bark was not removed by washing with a high-pressure washer. In contrast, the rough bark of Japanese persimmon was removed completely. No significant differences in the137Cs concentration of ‘Akatsuki’ fruit were found between the treatments conducted in the summer of 2011. Upon the bark washing of peach ‘Akatsuki’ trees in summer, the possibility of secondary contamination of leaves via the leachate containing137Cs was likely. The137Cs concentrations in fruits and leaves of peach ‘Kawanakajima Hakuto’ collected in summer 2012 were decreased significantly by washing treatment conducted in winter 2011-2012. In the year after treatment, the137Cs concentrations in fruits and leaves of Japanese persimmon were significantly decreased by the treatment. The effect of the bark washing on decreasing137Cs contents in fruits and leaves was greater in Japanese persimmon than in peach. The results for ‘Kawanakajima Hakuto’ and ‘Hachiya’ demonstrated the possibility of additive contamination.
KW - Contamination
KW - Fukushima daiichi nuclear power station
KW - High-pressure washing
KW - Migration via bark
KW - Radioactive fallout
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U2 - 10.2503/hortj.MI-054
DO - 10.2503/hortj.MI-054
M3 - Article
AN - SCOPUS:84944748675
VL - 84
SP - 295
EP - 304
JO - Horticulture Journal
JF - Horticulture Journal
SN - 2189-0102
IS - 4
ER -