Fractionation of nitrogen isotopes by animals: a further complication to the use of variations in the natural abundance of 15N for tracer studies
- 1 February 1978
- journal article
- research article
- Published by Cambridge University Press (CUP) in The Journal of Agricultural Science
- Vol. 90 (1) , 7-9
- https://doi.org/10.1017/s002185960004853x
Abstract
A study of the fractionation of nitrogen isotopes in the diet by cattle is described and the results discussed.Compared with the diet, urine had a lower ratio of 15N to 14N, but faeces, blood and milk all had a higher ratio.It is argued that the use of natural 15N as a tracer in grazed ecosystems is more complicated than was at first thought.Keywords
This publication has 14 references indexed in Scilit:
- The natural abundance of 15N in the soil water system of a small catchment areaSoil Research, 1977
- THE PRECISION OF DETERMINATIONS OF THE NATURAL ABUNDANCE OF NITROGEN-15 IN SOILS, FERTILIZERS, AND SHELF CHEMICALSSoil Science, 1974
- Variation in the Natural Nitrogen‐15 Abundance in Nitrate Mineralized During Incubation of Several Illinois SoilsSoil Science Society of America Journal, 1974
- Isotopic Tracer Techniques for Identification of Sources of Nitrate PollutionJournal of Environmental Quality, 1973
- Use of Variations in Natural Nitrogen Isotope Abundance for Environmental Studies: A Questionable ApproachScience, 1972
- Comparison and evaluation of methods for including nitrate in the total nitrogen determination of soilsJournal of the Science of Food and Agriculture, 1972
- Fertilizer Nitrogen: Contribution to Nitrate in Surface Water in a Corn Belt WatershedScience, 1971
- Nitrogen isotope fractionation in soils and microbial reactionsEnvironmental Science & Technology, 1970
- A rapid procedure for preparing gas samples for nitrogen-15 determinationThe Analyst, 1970
- Variations of Nitrogen-15 Abundance in SoilsScience, 1964