Element contents and stable isotope analysis in plants from a nitrogen and potassium tracer experiment in the Chilean Coastal Cordillera
- Stock, Svenja C
- Koester, Moritz
- Nájera, Francisco
- Boy, Jens
- Matus, Francisco
- Merino, Carolina
- Abdallah, Khaled
- Spielvogel, Sandra
- Gorbushina, Anna A
- Dippold, Michaela Anna
- Kuzyakov, Yakov
DOIAbstract
A tracer experiment was conducted in three study sites along a continental transect from arid to humid-temperate conditions in the Chilean Coastal Cordillera. The objective was to determine the short-term (<1 year) plant nitrogen (N) and potassium (K) acquisition from topsoil (A-Bw horizons), subsoil (Bw-BCw horizons), and saprolite (below BCw horizon). In February and March 2016, δ¹⁵N (as Na¹⁵NO₃, 99 at%) and the K analogs rubidium (as RbCl) and cesium (as CsCl) were injected in three soil depths around the focal plants: Gutierrezia resinosa (H.&A.) B. in the northernmost site (arid shrubland), Aristeguietia salvia (C.) K.&R. in the intermediate site (mediterranean woodland), and Araucaria araucana (M.) K. in the southernmost site (tempera...
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