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Showing 1 to 6 of 6 for “"15N-enrichment"”.
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Belowground Contributions of Pea and Canola to Soil Nitrogen Pools and Processes
… influence on soil nutrient cycling. Utilizing 15N-labeling methodologies under controlled conditions, the goal of this research was to quantify the input of belowground N (BGN), including rhizodeposits and roots, to soil and to investigate the influence of BGN on soil N cycling processes from …
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Investigating the trophic ecologies of early life stages of small pelagic fishes in the Benguela upwelling ecosystem
… trophic progression inferred through (a) a 15N enrichment and (b) an increase in carnivory fatty acid trophic markers. Interspecific partitioning is facilitated through distinctions in prey-size composition, with anchovy consuming comparatively larger prey than sardine. Surprisingly, sardine …
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Sub-Antarctic plant-soil interactions in a changing world: plant N acquisition and growth under warming on Marion Island
… iN soil fractions. Grasses supplied with either 15N-enriched oN (glycine) or iN (NO3 - ) provided evidence for oN acquisition in hydroponics. Experimental oN and iN provision (in hydroponics) resulted in higher relative growth rates (RGR) on iN compared to oN, but species-specific differences in …
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Direct Amino Acid Uptake by Plants related to Grassland Diversity - methodological and ecological Investigations
… acid uptake. In this, dual labelled (13C and 15N) amino acids are injected into the soil and direct tracer uptake is quantified via bulk isotope measurement of 13C and 15N enrichment in plant tissues, which recently has been challenged to exclusively reflect direct amino acid uptake. The first …
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Sediment-Pore Water Chemistry of Taupo Volcanic Zone Lakes and the Effect Trophic State has on Exchange with the Water Column
… between sediments and lake water. In particular, 15N enrichment in the benthic nepheloid layer (BNL), sediment-pore water geochemistry, the lead record in the sediment and silicon as a potential limiting nutrient for diatom growth were studied. In addition to the monthly analysis, discrete studies …
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Strukturelle Merkmale N-modifizierter Braunkohlen unter besonderer Berücksichtigung der Huminstoffe
… und fest organisch gebundenen N-Bindungsformen. 15N-NMR-Spektroskopische Untersuchungen an einem 15N-angereicherten Produkt, Py-GC/MS-Untersuchungen und nasschemische Experimente zeigen, dass in der Vergangenheit die Bedeutung heterocyclischer, insbesondere heteroaromatischer N-Bindungsformen …