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Variations of 7Be concentration in plants and its significance for 7Be in soil on the Loess Plateau, China: Based on three-year monitoring data

Abstract

Aims

With the wide application of 7Be (Beryllium-7) in soil erosion investigations, retention and interception of 7Be by vegetation plays an important role in documenting soil 7Be redistribution, with a large impact on the interpretation of 7Be measurements. However, the dynamic and temporal changes in plants and the relationship with soil 7Be concentration remain unclear, and the significance of dead plants in 7Be interception is under-researched.

Methods

The samples of single plants (6 different species), compositive plants (including living and dead plants), along with soil reference on the Loess Plateau were collected individually to analyze the variations of 7Be concentration during the growth period from 2010 to 2012.

Results

The accumulation of 7Be per mass is significantly higher in leaves than stems. The 7Be activity per mass and per area in living plants with seasonal trends ranged from 173.9 to 703.1 Bq kg–1 and 21.5 to 190.1 Bq m–2, respectively, and in dead plants ranged from 381.8 to 964.5 Bq kg–1 and 30.4 to 285.7 Bq m–2. Precipitation accounted for the largest contribution to the accumulation of 7Be in plants, followed by plant growth, species and parts. Plants accounted for 7Be interception on slope up to 66% (living plants accounted for 7% ~ 31% and dead plants accounted for 6% ~ 44%). The interception of living plants is low at first, then increases with the accumulation of rainfall and biomass together.

Conclusions

Our results highlight that 7Be in plants (especially for the dead plants) is of great significance for 7Be in soil on the slope, and is controlled by precipitation, growth status and plant characteristics. The reference information obtained in this work will contribute to improving the accuracy of 7Be tracing technology, and broadening its scope.

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Availability of data and materials

The datasets generated and/or analyzed during the current study are not publicly available due to related project policies and regulations, but are available from the corresponding author on reasonable request.

References

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Funding

This work was supported by the National Natural Science Foundation of China (No. 41877080, 42177338) and the Loess Plateau Ecological Restoration Innovation Team, Shaanxi Academy of Forestry (SXLK2020-03–02).

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Authors and Affiliations

Authors

Contributions

All authors contributed to the study conception and design. The first draft of the manuscript was written by Xuantian Li. Methodology, experimental design, sampling and writing review were performed by Fengbao Zhang; The English and conceptualization were performed by Claudio O. Delang; Data analysis was performed by Yanxing He; Conceptualization was performed by Mingyi Yang and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Fengbao Zhang.

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The authors have no competing interests to declare that are relevant to the content of this article.

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Li, X., Zhang, F., He, Y. et al. Variations of 7Be concentration in plants and its significance for 7Be in soil on the Loess Plateau, China: Based on three-year monitoring data. Plant Soil (2022). https://doi.org/10.1007/s11104-022-05453-x

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  • DOI: https://doi.org/10.1007/s11104-022-05453-x

Keywords

  • Beryllium-7
  • Loess Plateau
  • Precipitation
  • Plant
  • Activity concentration