Why strontium baselines should be based on pristine areas only: The disturbing effect of agricultural lime revisited
Contact us if these videos are not relevant.
Contact us if these videos are not relevant.
View abstract on PubMed
Summary
This summary is machine-generated.Agricultural lime lowers groundwater 87Sr/86Sr ratios in farmland. Pristine areas retain higher ratios, indicating lime
Area Of Science
- Geochemistry
- Environmental Science
- Hydrogeology
Background
- The 87Sr/86Sr ratio in groundwater is a key geochemical tracer.
- Understanding anthropogenic impacts on natural strontium isotope signatures is crucial for environmental monitoring.
Purpose Of The Study
- To investigate the impact of agricultural practices on groundwater 87Sr/86Sr ratios.
- To differentiate between natural and anthropogenic sources of strontium in meltwater plain environments.
Main Methods
- Analysis of 87Sr/86Sr ratios in groundwater and vadose zone sand from boreholes.
- Comparison of isotope ratios in pristine (heath/forest) and agricultural (farmland) areas.
- Evaluation of potential strontium sources, including agricultural lime and carbonate clasts.
Main Results
- Groundwater and vadose zone sand exhibit significantly lower 87Sr/86Sr ratios in farmland compared to pristine areas.
- The observed decrease in 87Sr/86Sr ratios in farmland is attributed to the application of agricultural lime.
- Strontium from agricultural lime is mobile and not retained in topsoil.
Conclusions
- Agricultural lime application demonstrably alters groundwater strontium isotope signatures.
- Pristine areas serve as a better reference for natural strontium baselines.
- Groundwater and surface water in contact with farmland are unsuitable for establishing natural strontium baselines.
Contact us if these videos are not relevant.
Contact us if these videos are not relevant.
