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Suzuki M, Kubo K, Hachinohe M, Sato T, Tsukada H, Yamaguchi N, Watanabe T, Maruyama H, Shinano T. Effects of cattle manure compost application on crop growth and soil-to-crop transfer of cesium in a physically radionuclide-decontaminated field. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 908:167939. [PMID: 37924879 DOI: 10.1016/j.scitotenv.2023.167939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 10/16/2023] [Accepted: 10/17/2023] [Indexed: 11/06/2023]
Abstract
Resuming crop production in physically decontaminated fields affected by radiocesium (134Cs and 137Cs) releases is crucial for restoring impacted areas. However, surface soil excavation to reduce radiocesium may lead to lower crop yield due to the loss of fertile topsoil. This study aimed to assess the effects of cattle manure compost (CMC) application on soil properties, crop growth, and 137Cs soil-to-crop transfer in a physically decontaminated field and pot experiment. Field trials were conducted during 2018-2022, with CMC (1 and 2 kg m-2 year-1) applied alongside conventional fertilization (CMC1 and CMC2 plots, respectively) in 2018-2019 and conventional fertilization alone in 2020-2022. Additionally, a pot experiment was used to evaluate the impact of CMC application in soil (1 kg m-2 year-1 for 5 years) on 137Cs transfer. In the field trial during 2018-2019, CMC1 and CMC2 plots exhibited higher soybean shoot dry weight (DW) compared with plots receiving conventional fertilization and additional K fertilizer (+K2O). CMC application also improved soil nutrient content. The transfer factor of 137Cs (TF-137Cs: plant 137Cs activity concentration/soil 137Cs activity concentration) followed the order CMC2 < CMC1 ≈ +K2O < conventional fertilization only (CF) and was negatively correlated with soil exchangeable K (Ex-K). During 2020-2022, when all plots received conventional fertilization alone, grain yields were higher in CMC1 and CMC2 plots than in the +K2O plot, with the lowest TF-137Cs in CMC2 plot followed by CMC1, +K2O, and CF plots. The pot experiment confirmed that CMC soil had a lower TF-137Cs and higher plant DW compared with CF soil with the same Ex-K level. Additionally, the soil exchangeable 137Cs (Ex-137Cs) level was significantly lower in CMC soil than CF soil. These findings demonstrate the potential of CMC application to improve crop growth and reduce 137Cs transfer in physically decontaminated fields.
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Affiliation(s)
- Masataka Suzuki
- Research Faculty of Agriculture, Hokkaido University, Kita 9 Nishi 9, Kita-ku, Sapporo, Hokkaido 060-8589, Japan.
| | - Katashi Kubo
- Agricultural Radiation Research Center, Tohoku Agricultural Research Center, National Agriculture and Food Research Organization (NARO), 50 Harajukuminami, Arai, Fukushima 960-2156, Japan.
| | - Mayumi Hachinohe
- Division of Food Quality and Food Safety Research, Institute of Food Research, NARO, 2-1-12 Kannondai, Tsukuba, Ibaraki 305-8642, Japan.
| | - Takashi Sato
- Faculty of Bioresource Sciences, Akita Prefectural University, 241-438 Kaidobata-Nishi, Nakano, Shimoshinjo, Akita 010-0195, Japan.
| | - Hirofumi Tsukada
- Institute of Environmental Radioactivity, Fukushima University, 1 Kanayagawa, Fukushima, Fukushima 960-1296, Japan.
| | - Noriko Yamaguchi
- Division of Environmental Chemical Research, Institute for Agro-environmental Sciences, NARO, 3-1-3 Kan-nondai, Tsukuba, Ibaraki 305-8604, Japan.
| | - Toshihiro Watanabe
- Research Faculty of Agriculture, Hokkaido University, Kita 9 Nishi 9, Kita-ku, Sapporo, Hokkaido 060-8589, Japan.
| | - Hayato Maruyama
- Research Faculty of Agriculture, Hokkaido University, Kita 9 Nishi 9, Kita-ku, Sapporo, Hokkaido 060-8589, Japan.
| | - Takuro Shinano
- Research Faculty of Agriculture, Hokkaido University, Kita 9 Nishi 9, Kita-ku, Sapporo, Hokkaido 060-8589, Japan; Agricultural Radiation Research Center, Tohoku Agricultural Research Center, National Agriculture and Food Research Organization (NARO), 50 Harajukuminami, Arai, Fukushima 960-2156, Japan.
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Eguchi T, Ishikawa T, Fujimura S, Ota T, Wakabayashi S, Matsunami H, Shinano T. Application of Finnish phlogopite to reduce radiocesium uptake by paddy rice. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2021; 237:106687. [PMID: 34186241 DOI: 10.1016/j.jenvrad.2021.106687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 06/03/2021] [Accepted: 06/15/2021] [Indexed: 06/13/2023]
Abstract
Field and pot experiments were conducted to evaluate the effectiveness of coarse Finnish phlogopite application to reduce radiocesium uptake by paddy rice (Oryza sativa L.). The application of phlogopite was expected to reduce radiocesium uptake by crops through K supply and radiocesium retention. Three fields were set in Fukushima Prefecture, and coarse (mean particle size of 450 μm) phlogopite from Siilinjärvi (Finland) was applied at a rate of 5 t ha-1. Paddy rice was cultivated for 2-4 successive years. In all fields, the average 137Cs transfer factor (TF) of brown rice harvested from plots with added phlogopite was significantly lower than that of brown rice from plots without added phlogopite over the 2-4-year experiments. TF was decreased by up to 80% following phlogopite application, without an adverse effect on yield. Exchangeable K and soil solution K were higher in the soils with added phlogopite, suggesting K released from phlogopite reduced 137Cs uptake by paddy rice. Moreover, in a pot cultivation experiment, even when 55% of the total K was removed from phlogopite prior to application, the TF in pots with phlogopite application was less than half of that in pots without added phlogopite. The results from the field study and the pot cultivation experiment suggested that the application of Finnish phlogopite is effective to reduce the TF of brown rice. Exchangeable K and tetraphenylborate-extractable-K (TPB-K) at rooting stage, and soil solution K at tillering and heading stages showed significant negative correlation with TF. TPB-K was significantly positively correlated with soil solution K at tillering stage and heading stage, whereas exchangeable K at rooting stage did not exhibit significant correlation with soil solution K at heading stage. The results suggest that TPB-K is more reliable than exchangeable K, which could facilitate as a basis of K fertilizer recommendation for radiocesium-contaminated fields.
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Affiliation(s)
- Tetsuya Eguchi
- Tohoku Agricultural Research Center, National Agriculture and Food Research Organization, Fukushima, Fukushima, 960-2156, Japan.
| | - Tetsuya Ishikawa
- Tohoku Agricultural Research Center, National Agriculture and Food Research Organization, Fukushima, Fukushima, 960-2156, Japan
| | - Shigeto Fujimura
- Tohoku Agricultural Research Center, National Agriculture and Food Research Organization, Fukushima, Fukushima, 960-2156, Japan
| | - Takeshi Ota
- Tohoku Agricultural Research Center, National Agriculture and Food Research Organization, Fukushima, Fukushima, 960-2156, Japan
| | - Shokichi Wakabayashi
- Tohoku Agricultural Research Center, National Agriculture and Food Research Organization, Fukushima, Fukushima, 960-2156, Japan
| | - Hisaya Matsunami
- Tohoku Agricultural Research Center, National Agriculture and Food Research Organization, Fukushima, Fukushima, 960-2156, Japan
| | - Takuro Shinano
- Tohoku Agricultural Research Center, National Agriculture and Food Research Organization, Fukushima, Fukushima, 960-2156, Japan
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Matsunami H, Uchida T, Kobayashi H, Ota T, Shinano T. Comparative dynamics of potassium and radiocesium in soybean with different potassium application levels. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2021; 233:106609. [PMID: 33857822 DOI: 10.1016/j.jenvrad.2021.106609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 03/17/2021] [Accepted: 03/23/2021] [Indexed: 06/12/2023]
Abstract
We conducted a field experiment in soybean with different levels of K application to elucidate the comparative dynamics of 137Cs and K. The inventory of K in the shoots increased substantially from the fifth trifoliate stage to the full seed stage, and as the absorption of K increased, so too did the absorption of 137Cs. Overall, the effect of K application was much greater in terms of 137Cs dynamics than K dynamics or biomass production. K application reduced not only the accumulation of 137Cs in the shoots, but also the distribution of 137Cs to the grains. However, the decrease of 137Cs distribution to the grain had a much smaller effect on 137Cs accumulation in the grains than 137Cs absorption. A positive correlation was also observed between the exchangeable 137Cs/K ratio in the soil and the 137Cs/K ratio in the shoots for each growth stage, and the 137Cs/K ratios in the shoots at the full seed and full maturity stage were much higher than those at the fifth trifoliate and full bloom stage under the same exchangeable 137Cs/K ratio in the soil. These findings suggest a decrease in the discrimination of 137Cs from K during absorption after the full bloom stage. As a result of this and the increase in soil-exchangeable 137Cs/K with growth, radiocesium was more transferable to the shoots after the full bloom stage. Overall, these results suggest that lowering the soil-exchangeable radiocesium/potassium ratio after the full bloom stage by increasing K availability could efficiently reduce the transfer of radiocesium to the grains.
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Affiliation(s)
- Hisaya Matsunami
- Agricultural Radiation Research Center, Tohoku Agricultural Research Center, NARO, 50 Harajuku-minami, Arai, Fukushima, Fukushima, 960-2156, Japan.
| | - Tomoko Uchida
- Agricultural Radiation Research Center, Tohoku Agricultural Research Center, NARO, 50 Harajuku-minami, Arai, Fukushima, Fukushima, 960-2156, Japan; Division of Agro-Environment Research, Tohoku Agricultural Research Center, NARO, 4 Akahira, Shimo-kuriyagawa, Morioka, Iwate, 020-0198, Japan.
| | - Hiroyuki Kobayashi
- Agricultural Radiation Research Center, Tohoku Agricultural Research Center, NARO, 50 Harajuku-minami, Arai, Fukushima, Fukushima, 960-2156, Japan; Center for Weed and Wildlife Management, Utsunomiya University, 350 Mine-machi, Utsunomiya, Tochigi, 321-8505, Japan.
| | - Takeshi Ota
- Agricultural Radiation Research Center, Tohoku Agricultural Research Center, NARO, 50 Harajuku-minami, Arai, Fukushima, Fukushima, 960-2156, Japan; Bio-oriented Technology Research Advancement Institution, NARO, 8 Higashida-cho, Kawasaki, Kanagawa, 210-0005, Japan.
| | - Takuro Shinano
- Agricultural Radiation Research Center, Tohoku Agricultural Research Center, NARO, 50 Harajuku-minami, Arai, Fukushima, Fukushima, 960-2156, Japan; Research Faculty of Agriculture, Hokkaido University, Kita 9, Nishi 9, Kita-ku, Sapporo, Hokkaido, 060-8589, Japan.
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Wakabayashi S, Takahashi S, Matsunami H, Hamamatsu S, Hachinohe M, Kihou N, Yamaguchi N. Evaluation of 137Cs ageing by dynamics of 137Cs/ 133Cs ratio in Andosol paddy fields with/without potassium fertilizer application. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2020; 218:106252. [PMID: 32421576 DOI: 10.1016/j.jenvrad.2020.106252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 02/25/2020] [Accepted: 03/15/2020] [Indexed: 06/11/2023]
Abstract
The mobility of 137Cs in soil decreases with time owing to fixation by micaceous minerals. Such ageing is a critical parameter for estimating and predicting annual change in 137Cs contamination risk of agricultural products. The decrease in the exchangeable fraction of 137Cs has traditionally been used as an index of the 137Cs ageing. Under field conditions, however, exchangeable 137Cs is influenced by several environmental factors. In this study, we propose a new index to evaluate the 137Cs ageing with minimum influence of environmental factors. The ratio of the exchangeable 137Cs fraction to exchangeable fraction of 133Cs ((137Cs/133Cs)exch) eliminates the influence of environmental factors on exchangeable 137Cs. We assessed the applicability of the (137Cs/133Cs)exch index, using a four-year field study of a rice paddy in allophanic Andosol, starting 200 days after the Fukushima Dai-ichi Nuclear Power Plant accident. The influence of K fertilization was also investigated. The 137Cs and 133Cs exchangeable fractions varied together, indicating that both were similarly controlled by environmental factors. The values of (137Cs/133Cs)exch decreased with time, reflecting 137Cs fixation by the ageing. The half-time of the (137Cs/133Cs)exch decline was 6.6-17.7 years. Relative to K fertilization, the lack of K fertilization seemed to affect the 137Cs ageing in two ways: the early 137Cs fixation progressed more rapidly, probably because fewer competing K+ ions were present, and the long-term ageing process was occasionally hampered, probably by the release of reserve K from micaceous minerals. The (137Cs/133Cs)exch values were similar to the ratio of the 137Cs to 133Cs transfer factor of the rice straw. Thus, we conclude that the (137Cs/133Cs)exch index is reliable for evaluating the 137Cs ageing, decrease in 137Cs mobility caused by the diffusion into micaceous mineral interlayer, in the field.
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Affiliation(s)
- Shokichi Wakabayashi
- Tohoku Agricultural Research Center, NARO (National Agriculture and Food Research Organization), 50 Harajukuminami, Arai, Fukushima, Fukushima, 960-2156, Japan.
| | - Shigeru Takahashi
- Central Region Agricultural Research Center, NARO, 2-1-18 Kannondai, Tsukuba, Ibaraki, 305-8666, Japan.
| | - Hisaya Matsunami
- Tohoku Agricultural Research Center, NARO (National Agriculture and Food Research Organization), 50 Harajukuminami, Arai, Fukushima, Fukushima, 960-2156, Japan.
| | - Shioka Hamamatsu
- Headquarters, NARO, 3-1-1 Kannondai, Tsukuba, Ibaraki, 305-8517, Japan.
| | - Mayumi Hachinohe
- Food Research Institute, NARO, 2-1-12 Kannondai, Tsukuba, Ibaraki, 305-8642, Japan.
| | - Nobuharu Kihou
- Institute for Agro-Environmental Sciences, NARO, 3-1-3 Kannondai, Tsukuba, Ibaraki, 305-8604, Japan.
| | - Noriko Yamaguchi
- Institute for Agro-Environmental Sciences, NARO, 3-1-3 Kannondai, Tsukuba, Ibaraki, 305-8604, Japan.
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Thiry Y, Albrecht A, Tanaka T. Development and assessment of a simple ecological model (TRIPS) for forests contaminated by radiocesium fallout. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2018; 190-191:149-159. [PMID: 29793757 DOI: 10.1016/j.jenvrad.2018.05.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 02/26/2018] [Accepted: 05/07/2018] [Indexed: 06/08/2023]
Abstract
The management of vast forested zones contaminated by radiocesium (rCs) following the Chernobyl and Fukushima fallout is of great social and economic concern in affected areas and requires appropriate dynamic models as predictive or questioning tools. Generally, the existing radio-ecological models need less fragmented data and more ecological realism in their quantitative description of the rCs cycling processes. The model TRIPS ("Transfer of Radionuclide In Perennial vegetation Systems") developed in this study privileged an integrated approach which makes the best use of mass balance studies and available explicit experimental data for Scots pine stands. A main challenge was the differentiation and calibration of foliar absorption as well as root uptake in order to well represent the rCs biocycling. The general dynamics of rCs partitioning was simulated with a relatively good precision against an independent series of observed values. In our scenario the rCs biological cycling enters a steady-state about 15 years after the atmospheric deposits. At that time, the simulations showed an equivalent contribution of foliage and root uptake to the tree contamination. But the root uptake seems not sufficient to compensate the activity decline in the tree. The initial foliar uptake and subsequent internal transfers were confirmed to have a great possible impact on the phasing of tree contamination. An extra finding concerns the roots system acting as a buffer in the early period. The TRIPS model is particularly useful in cases where site-specific integrated datasets are available, but it could also be used with adequate caution to generic sites. This development paves the way for simplification or integration of new modules, as well as for a larger number of other applications for the Chernobyl or Fukushima forests once the appropriate data become available. According to the sensitivity analysis that involves in particular reliable estimates of net foliar uptake as well as root uptake not disconnected from rCs exchange reactions in soil.
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Affiliation(s)
- Yves Thiry
- Andra, Research and Development Division, 1-7 rue Jean-Monnet, 92298 Châtenay-Malabry cedex, France.
| | - Achim Albrecht
- Andra, Research and Development Division, 1-7 rue Jean-Monnet, 92298 Châtenay-Malabry cedex, France
| | - Taku Tanaka
- EDF R&D, LNHE, 6 quai Watier, 78400 Chatou, France
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A novel role for methyl cysteinate, a cysteine derivative, in cesium accumulation in Arabidopsis thaliana. Sci Rep 2017; 7:43170. [PMID: 28230101 PMCID: PMC5322390 DOI: 10.1038/srep43170] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 01/18/2017] [Indexed: 11/18/2022] Open
Abstract
Phytoaccumulation is a technique to extract metals from soil utilising ability of plants. Cesium is a valuable metal while radioactive isotopes of cesium can be hazardous. In order to establish a more efficient phytoaccumulation system, small molecules which promote plants to accumulate cesium were investigated. Through chemical library screening, 14 chemicals were isolated as ‘cesium accumulators’ in Arabidopsis thaliana. Of those, methyl cysteinate, a derivative of cysteine, was found to function within the plant to accumulate externally supplemented cesium. Moreover, metabolite profiling demonstrated that cesium treatment increased cysteine levels in Arabidopsis. The cesium accumulation effect was not observed for other cysteine derivatives or amino acids on the cysteine metabolic pathway tested. Our results suggest that methyl cysteinate, potentially metabolised from cysteine, binds with cesium on the surface of the roots or inside plant cells and improve phytoaccumulation.
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Eguchi T, Ohta T, Ishikawa T, Matsunami H, Takahashi Y, Kubo K, Yamaguchi N, Kihou N, Shinano T. Influence of the nonexchangeable potassium of mica on radiocesium uptake by paddy rice. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2015; 147:33-42. [PMID: 26026983 DOI: 10.1016/j.jenvrad.2015.05.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Revised: 05/04/2015] [Accepted: 05/05/2015] [Indexed: 06/04/2023]
Abstract
A pot cultivation experiment was conducted to elucidate the influence of the nonexchangeable potassium (K) of mica on radiocesium ((137)Cs) uptake by paddy rice (Oryza sativa L. cv. Koshihikari), and to evaluate the potential of mica application as a countermeasure to reduce radiocesium transfer from soil to paddy rice. The increase in the exchangeable K concentrations of soils, measured before planting, due to mica (muscovite, biotite, and phlogopite) application was negligible. However, in trioctahedral mica (biotite and phlogopite)-treated soil, the release of nonexchangeable K from the mica interlayer maintained the soil-solution K at a higher level during the growing season in comparison to the control, and consequently decreased the (137)Cs transfer factor for brown rice (TF). The sodium tetraphenylboron (TPB)-extractable K concentration of the soils, measured before planting, was strongly negatively correlated with the TF, whereas the exchangeable K concentration of the soils, also measured before planting, was not correlated with the TF. Therefore, we conclude that TPB-extractable K is more reliable than exchangeable K as a basis of fertilizer recommendations for radiocesium-contaminated paddy fields. Phlogopite-treated soils exhibited higher TPB-extractable K concentrations and lower TF values than biotite-treated soils. We thus conclude that phlogopite application is an effective countermeasure to reduce radiocesium uptake in paddy rice.
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Affiliation(s)
- Tetsuya Eguchi
- Agricultural Radiation Research Center, NARO Tohoku Agricultural Research Center (NARO/TARC), Fukushima 960-2156, Japan.
| | - Takeshi Ohta
- Agricultural Radiation Research Center, NARO Tohoku Agricultural Research Center (NARO/TARC), Fukushima 960-2156, Japan
| | - Tetsuya Ishikawa
- Agricultural Radiation Research Center, NARO Tohoku Agricultural Research Center (NARO/TARC), Fukushima 960-2156, Japan
| | - Hisaya Matsunami
- Agricultural Radiation Research Center, NARO Tohoku Agricultural Research Center (NARO/TARC), Fukushima 960-2156, Japan
| | - Yoshihiko Takahashi
- Agricultural Radiation Research Center, NARO Tohoku Agricultural Research Center (NARO/TARC), Fukushima 960-2156, Japan
| | - Katashi Kubo
- Agricultural Radiation Research Center, NARO Tohoku Agricultural Research Center (NARO/TARC), Fukushima 960-2156, Japan
| | - Noriko Yamaguchi
- Soil Environment Division, National Institute for Agro-Environmental Sciences, Ibaraki 305-8604, Japan
| | - Nobuharu Kihou
- Soil Environment Division, National Institute for Agro-Environmental Sciences, Ibaraki 305-8604, Japan
| | - Takuro Shinano
- Agricultural Radiation Research Center, NARO Tohoku Agricultural Research Center (NARO/TARC), Fukushima 960-2156, Japan
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Sreenivasa Chari M, Manjaiah KM, Sachdev P, Sachdev MS. 134Cs transfer factors to green gram and soybean as influenced by waste mica. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2012; 104:46-54. [PMID: 22115435 DOI: 10.1016/j.jenvrad.2011.08.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2010] [Revised: 08/05/2011] [Accepted: 08/11/2011] [Indexed: 05/31/2023]
Abstract
Greenhouse pot culture experiment was carried out to study the (134)Cs transfer factors from soils to green gram and soybean as influenced by waste mica application (@ 0, 10, 20, 40 g mica kg(-1) soil) and compared with muriate of potash (MOP) application (0.17 g kg(-1) soil). For the study, the soils were contaminated with (134)Cs radionuclide @ 37 kBq kg(-1) soil. The shoot biomass and K uptake by crops were significantly improved with waste mica application (@ 40 g kg(-1) soil). Compared to control, waste mica and MOP application significantly improved the yield, K content in plant and its uptake. Amongst the soils, crops grown in vertisol recorded higher shoot biomass compared to inceptisol and ultisol. Irrespective of the treatments, higher (134)Cs transfer factors were seen in ultisol (0.30) as compared to inceptisol (0.16) and vertisol (0.13). It was observed that higher the K concentration in soil and plant, lowered (134)Cs transfer to green gram and soybean. The study recommended that waste mica @ 20 g kg(-1) would be useful for checking the (134)Cs transfer factors from soils to green gram and soybean.
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Affiliation(s)
- M Sreenivasa Chari
- Division of Soil Science and Agricultural Chemistry, Indian Agricultural Research Institute, New Delhi 110012, India
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Vandebroek L, Van Hees M, Delvaux B, Spaargaren O, Thiry Y. Relevance of Radiocaesium Interception Potential (RIP) on a worldwide scale to assess soil vulnerability to 137Cs contamination. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2012; 104:87-93. [PMID: 21963466 DOI: 10.1016/j.jenvrad.2011.09.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2009] [Revised: 08/19/2011] [Accepted: 09/02/2011] [Indexed: 05/22/2023]
Abstract
The extent of radiocaesium retention in soil is important to quantify the risk of further foodchain contamination. The Radiocaesium Interception Potential (RIP -Cremers et al., 1988, Nature 335, 247-249) is an intrinsic soil parameter which can be used to categorize soils or minerals in terms of their capacity to selectively adsorb radiocaesium. In this study, we measured RIP for a large soil collection (88 soil samples) representative of major FAO soil reference groups on a worldwide scale and tested the possibility to predict the RIP on the basis of other easily accessible or measurable soil data. We also compared RIP values with those obtained from separate chemical extraction experiments. The range of measured RIP values (1.8-13300 mmol kg(-1)) was shown to include nearly all possible cases of agricultural soil contamination. Only Podzols, Andosols and Ferralsols were clearly characterized by a very low RIP (<2000 mmol kg(-1)). On a worldwide scale, RIP was in fact slightly related to soil reference type or other simple major physicochemical parameters such as clay percentage or organic matter. Conversely our results indicated a link between the RIP and radiocaesium extractability across very different soils. We showed that, with the proposed scale of RIP values, a simple acid extraction method can provide an operational result highly predictive of potential RIP despite very contrasting soil properties. The RIP could be estimated from the empirical equation: RIP = (-31.701 ∗ log(AER) + 58.886)(2) where AER is the fraction of acid-extractable radiocaesium.
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Affiliation(s)
- Louis Vandebroek
- SCK•CEN, Belgian Nuclear Research Center, Foundation of Public Utility, Biosphere Impact Studies, Boeretang 200, 2400 Mol, Belgium
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de Boulois HD, Joner EJ, Leyval C, Jakobsen I, Chen BD, Roos P, Thiry Y, Rufyikiri G, Delvaux B, Declerck S. Role and influence of mycorrhizal fungi on radiocesium accumulation by plants. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2008; 99:785-800. [PMID: 18055077 DOI: 10.1016/j.jenvrad.2007.10.008] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 10/18/2007] [Indexed: 05/25/2023]
Abstract
This review summarizes current knowledge on the contribution of mycorrhizal fungi to radiocesium immobilization and plant accumulation. These root symbionts develop extended hyphae in soils and readily contribute to the soil-to-plant transfer of some nutrients. Available data show that ecto-mycorrhizal (ECM) fungi can accumulate high concentration of radiocesium in their extraradical phase while radiocesium uptake and accumulation by arbuscular mycorrhizal (AM) fungi is limited. Yet, both ECM and AM fungi can transport radiocesium to their host plants, but this transport is low. In addition, mycorrhizal fungi could thus either store radiocesium in their intraradical phase or limit its root-to-shoot translocation. The review discusses the impact of soil characteristics, and fungal and plant transporters on radiocesium uptake and accumulation in plants, as well as the potential role of mycorrhizal fungi in phytoremediation strategies.
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Affiliation(s)
- H Dupré de Boulois
- Université catholique de Louvain, Unité de Microbiologie, Croix du Sud 3, 1348 Louvain-la-Neuve, Belgium
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