文献类型： 外文期刊

作者： Li, Peiran ¹ ; Gong, Yingting ² ; Tanaka, Taku ³ ; Thiry, Yves ⁴ ; Huang, Qiliang ⁵ ; Komatsuzaki, Masakazu ⁵ ;

作者机构： 1.Minist Ecol & Environm PRC, South China Inst Environm Sci, State Environm Protect Key Lab Environm Pollut Hlt, Guangzhou, Peoples R China

2.Guangdong Acad Agr Sci, Inst Agr Resources & Environm, Guangzhou, Peoples R China

3.EDF R&D, LNHE, 6 Quai Watier, F-78400 Chatou, France

4.French Natl Radioact Waste Management Agcy Andra, Res & Dev Div, F-92298 Chaitenay Malabry, France

5.Tokyo Univ Agr & Technol, United Grad Sch Agr Sci, Saiwaicho 3-5-8, Fuchu, Tokyo 1838509, Japan

6.Ibaraki Univ, Ctr Int Field Agr Res & Educ, 3-21-1 Ami, Inashiki, Ibaraki 3000393, Japan

关键词： 137Cs inventory; Tillage; Cover crop treatments; Long-term transfers; Dynamic compartment model; Agroecosystem

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：9.8； 五年影响因子：9.6 ）

ISSN： 0048-9697

年卷期： 2024 年 907 卷

页码：

收录情况： SCI

摘要： The 2011 nuclear accident at Japan's Fukushima Daiichi Nuclear Power Plant (FDNPP) prompted inquiries about the long-term transfer of Cesium-137 (137Cs) from soil to agricultural plants. In this context, numerical modeling is particularly useful for the long-term evaluation of the consequences of agroecosystem contamination. Agricultural practices, such as tillage and cover cropping, play key roles in 137Cs recycling in agroecosystems. In this study, we used 10-year monitoring data to develop a dynamic model to predict 137Cs redistribution (via uptake, litterfall, translocation, and percolation) under different tillage (no-tillage, NT; rotary cultivation, RC; moldboard plow, MP) and cover crop (rye; hairy vetch; fallow weed) treatments. The verification exercise and assessment results indicated the model's reliability, as the temporal dynamics of predicted values agreed with observed values. Tillage significantly influenced the 137Cs distribution in soil, thereby decreasing plant uptake of 137Cs, whereas cover crop exerted a minimal effect on 137Cs cycling. Furthermore, while the 137Cs concentrations in soybean grain under RC and NT treatments were comparable 62 years after the FDNPP accident, the concentration under MP treatment remained consistently the lowest. Despite natural decay being the main cause of the decreased global 137Cs level in the agroecosystem, with minimal losses from percolation to deeper soil layers and soybean harvesting, adopting an appropriate tillage practice was shown to promote a long-term reduction of 137Cs concentration in crops. Finally, to improve the model's accuracy, further research should consider incorporating the effects of soil properties and extreme weather events on 137Cs flow into the model, as these factors are essential for realizing improved agroecosystem predictions.