A - Papers appearing in refereed journals
Sun, Y., Amelung, W., Wu, B., Haneklaus, S., Schnug, E. and Bol, R. 2022. Fertilizer P-derived uranium continues to accumulate at Rothamsted long-term experiments. Science of the Total Environment. 820, p. 153118. https://doi.org/10.1016/j.scitotenv.2022.153118
Authors | Sun, Y., Amelung, W., Wu, B., Haneklaus, S., Schnug, E. and Bol, R. |
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Abstract | The application of phosphorus (P) fertilizers inevitably contributes to the accumulation of trace elements, such as uranium (U), in agricultural soils. The fertilizer-derived U accumulation was first reported in Rothamsted Research in 1979. In the present study, we expand this early key research by evaluating the fertilizer-derived U accumulation in topsoil (0–23 cm) from 1876 to the 2010s. We found that total U accumulation rates ranged from 2.8 to 6.1 μg U kg−1 yr−1 at the Broadbalk and Park Grass, respectively, being similar to those observed 40 years ago. This highlights that U accumulation is still an ongoing process in Rothamsted. Fortunately, the proportion of fertilizer-derived U did not significantly increase in the ammonium acetate extractable (‘proxy’ of plant-available) fraction over 130 years. In addition, we compiled an overview of the global rate of mineral P fertilizer-derived U accumulation in agricultural systems using existing literature (36 experimental trials, from 11 countries). The resulting dataset predicts an estimated mean U accumulation of 0.85 μg U kg−1 soil for an annual application of 1 kg P ha−1 in the topsoil of agricultural systems (0.26 μg U kg−1 per kg P ha−1 for arable land and 1.34 μg U kg−1 per kg P ha−1 for grassland). The annual U accumulation per applied kg P ha−1 being 0.08 (Broadbalk) and 0.17 μg U (Park Grass) corresponds to around one-third and one-eighth of the worldwide mean U accumulation for their respective agricultural systems, suggesting ‘relatively’ low U contents of the applied P fertilizers. Our study underscores that fertilizer-derived U accumulation is a persistent problem on the global scale, even if at different rates, and therewith suggests an evaluation of current regulatory limits and acceptable U input levels from P fertilization. |
Keywords | Fertilizer-derived uranium; Rothamsted; Soil; Agriculture; Phosphorus |
Year of Publication | 2022 |
Journal | Science of the Total Environment |
Journal citation | 820, p. 153118 |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.scitotenv.2022.153118 |
Open access | Published as non-open access |
Funder | Biotechnology and Biological Sciences Research Council |
Funder project or code | The Rothamsted Long Term Experiments [2017-2022] |
Output status | Published |
Publication dates | |
Online | 15 Jan 2022 |
Publication process dates | |
Accepted | 10 Jan 2022 |
ISSN | 0048-9697 |
Publisher | Elsevier Science Bv |
Permalink - https://repository.rothamsted.ac.uk/item/98817/fertilizer-p-derived-uranium-continues-to-accumulate-at-rothamsted-long-term-experiments
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