001007635 001__ 1007635
001007635 005__ 20240226075228.0
001007635 037__ $$aFZJ-2023-02127
001007635 1001_ $$0P:(DE-Juel1)177770$$aUhlig, David$$b0$$eCorresponding author$$ufzj
001007635 1112_ $$aGoldschmidt Hawaii 2022$$cHonolulu$$d2022-07-10 - 2022-07-15$$wUSA
001007635 245__ $$aTesting Mg stable isotopes as a potential geochemical tool in agronomy
001007635 260__ $$c2022
001007635 3367_ $$033$$2EndNote$$aConference Paper
001007635 3367_ $$2DataCite$$aOther
001007635 3367_ $$2BibTeX$$aINPROCEEDINGS
001007635 3367_ $$2DRIVER$$aconferenceObject
001007635 3367_ $$2ORCID$$aLECTURE_SPEECH
001007635 3367_ $$0PUB:(DE-HGF)6$$2PUB:(DE-HGF)$$aConference Presentation$$bconf$$mconf$$s1689060813_12097$$xOther
001007635 520__ $$aA sustainable use of soil resources is urgently required to cope with the increasing demand for agricultural products during climate change. Advanced soil cultivation methods like subsoil management were suggested but analytical tools to measure changes in the nutrient use efficiency of crops are still missing. Here we tested the applicability of Mg stable isotopes as novel evaluation tool in agronomy. To this end, we conceptually demonstrated under which conditions changes in the Mg isotope composition (26Mg) of crops and the bioavailable fraction of Mg in soils containing low, middle, and high inventories of exchangeable Mg could be resolved from analytical uncertainty, when simulating subsoil management. We found that shifts in 26Mg values are only detectable if i) the crop uptake-related Mg isotope fractionation factor is at the upper end of hitherto published fractionation factors, ii) a high Mg uptake flux of crops is matched by a low Mg supply from the exchangeable fraction, and iii) subsoil management causes a considerable deepening of the rooting system.We tested our concept on field trials, where deep loosening with and without the incorporation of compost was conducted on Luvisols. Shifts in 26Mg values of crops and the exchangeable fraction of Mg in soil were mostly unresolvable from the analytical uncertainty, which positively tested the Mg isotope concept for well nurtured soils. Yet, systematic shifts in 26Mg values among crops cultivated on and beside a melioration strip were found and attributed to the uplift of isotopically distinct compost-derived Mg on the melioration strip and root restricting layers beside the melioration strip. Also, field-based crop uptake-related ‘apparent’ Mg isotope fractionation factors of winter wheat and spring barley were determined, which differed from one another. However, the quantitative approach of Mg isotopes was violated when lime or Mg-carbonate containing fertilizer were applied to the field. In these cases, the isotope-derived difference in the Mg use efficiency were likely caused by the uneven distribution of lime-derived Mg with depth. Hence, using Mg stable isotopes as a new geochemical routine for agronomy will require further work to allow low-demanding, minimally invasive sampling of the soil-plant system.
001007635 536__ $$0G:(DE-HGF)POF4-2173$$a2173 - Agro-biogeosystems: controls, feedbacks and impact (POF4-217)$$cPOF4-217$$fPOF IV$$x0
001007635 536__ $$0G:(BMBF)031B0515C$$aBonaRes - (Modul A, Phase 2): Soil3-II - Nachhaltiges Unterbodenmanagement, Teilprojekt C (031B0515C)$$c031B0515C$$x1
001007635 7001_ $$0P:(DE-Juel1)138881$$aWu, Bei$$b1$$ufzj
001007635 7001_ $$0P:(DE-Juel1)129438$$aBerns, Anne E.$$b2$$ufzj
001007635 7001_ $$0P:(DE-Juel1)129427$$aAmelung, Wulf$$b3$$ufzj
001007635 909CO $$ooai:juser.fz-juelich.de:1007635$$pVDB
001007635 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)177770$$aForschungszentrum Jülich$$b0$$kFZJ
001007635 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)138881$$aForschungszentrum Jülich$$b1$$kFZJ
001007635 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)129438$$aForschungszentrum Jülich$$b2$$kFZJ
001007635 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)129427$$aForschungszentrum Jülich$$b3$$kFZJ
001007635 9131_ $$0G:(DE-HGF)POF4-217$$1G:(DE-HGF)POF4-210$$2G:(DE-HGF)POF4-200$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$9G:(DE-HGF)POF4-2173$$aDE-HGF$$bForschungsbereich Erde und Umwelt$$lErde im Wandel – Unsere Zukunft nachhaltig gestalten$$vFür eine nachhaltige Bio-Ökonomie – von Ressourcen zu Produkten$$x0
001007635 9141_ $$y2023
001007635 9201_ $$0I:(DE-Juel1)IBG-3-20101118$$kIBG-3$$lAgrosphäre$$x0
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001007635 980__ $$aVDB
001007635 980__ $$aI:(DE-Juel1)IBG-3-20101118
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