Amino Acid15N/14N Analysis at Natural Abundances: A New Tool for Soil Organic Matter Studies in Agricultural Systems
作者:
R. Bol,
N.J. Ostle,
K.J. Petzke,
A. Watson,
J. Cockburn,
期刊:
Isotopes in Environmental and Health Studies
(Taylor Available online 1998)
卷期:
Volume 34,
issue 1-2
页码: 87-93
ISSN:1025-6016
年代: 1998
DOI:10.1080/10256019708036336
出版商: Taylor & Francis Group
关键词: Amino acids;GC-IRMS;natural abundances;nitrogen 15;plant nutrition;soil organic matter
数据来源: Taylor
摘要:
The effects of landuse, fertilizer history and soil type on the quantity and isotopic quality of hydrolysable soil amino acids were examined in 3 grassland and 2 arable soils. Results showed, (i) that overall concentrations of individual amino acids were highest in the grassland soils, (ii) that ‰δ15N values of the individual amino acids differed considerably between the five soils, and (iii) that the combination of amino acid ‰δ15N values and concentrations could be used to distinguish between landuse, crop type and fertilizer history. This preliminary study indicates that the pathways of transformation of soil amino acid N are influenced by long term N inputs and that associated biological processes are reflected in differences in concentrations and ‰δ15N values of individual soil amino acids.
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