Field variability of carbon isotopes in soil organic carbon

S. W. Leavitt; E. A. Paul; E. Pendall; P. J. Pinter; B. A. Kimball

doi:10.1016/S0168-583X(96)00707-0

Field variability of carbon isotopes in soil organic carbon

S. W. Leavitt, E. A. Paul, E. Pendall, P. J. Pinter, B. A. Kimball

Research output: Contribution to journal › Article › peer-review

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Abstract

Free-air CO₂ enrichment (FACE) plant-growth experiments conducted in Arizona have allowed a spinoff isotope tracer experiment (tank CO₂ is ¹⁴C- and ¹³C-depleted) to follow the input of carbon into soil organic matter pools. Accurate assessment of the ¹⁴C and ¹³C inputs to soils by this pathway requires detailed knowledge of the isotopic composition of the soils before the experiments. We have examined the variability of δ¹³C in soil organic matter in 8 experimental plots prior to the beginning of the 1995-96 FACE experiments with wheat. δ¹³C variability was higher immediately after harvest of a previous crop in June, but the plots were much more homogeneous five months later immediately before planting. Intervening field management, including disking, plowing and installation of irrigation drip tape likely contributed to mixing the soils.

Original language	English (US)
Pages (from-to)	451-454
Number of pages	4
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	123
Issue number	1-4
DOIs	https://doi.org/10.1016/S0168-583X(96)00707-0
State	Published - Mar 1997

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

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10.1016/S0168-583X(96)00707-0

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title = "Field variability of carbon isotopes in soil organic carbon",

abstract = "Free-air CO2 enrichment (FACE) plant-growth experiments conducted in Arizona have allowed a spinoff isotope tracer experiment (tank CO2 is 14C- and 13C-depleted) to follow the input of carbon into soil organic matter pools. Accurate assessment of the 14C and 13C inputs to soils by this pathway requires detailed knowledge of the isotopic composition of the soils before the experiments. We have examined the variability of δ13C in soil organic matter in 8 experimental plots prior to the beginning of the 1995-96 FACE experiments with wheat. δ13C variability was higher immediately after harvest of a previous crop in June, but the plots were much more homogeneous five months later immediately before planting. Intervening field management, including disking, plowing and installation of irrigation drip tape likely contributed to mixing the soils.",

author = "Leavitt, {S. W.} and Paul, {E. A.} and E. Pendall and Pinter, {P. J.} and Kimball, {B. A.}",

year = "1997",

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TY - JOUR

T1 - Field variability of carbon isotopes in soil organic carbon

AU - Leavitt, S. W.

AU - Paul, E. A.

AU - Pendall, E.

AU - Pinter, P. J.

AU - Kimball, B. A.

PY - 1997/3

Y1 - 1997/3

N2 - Free-air CO2 enrichment (FACE) plant-growth experiments conducted in Arizona have allowed a spinoff isotope tracer experiment (tank CO2 is 14C- and 13C-depleted) to follow the input of carbon into soil organic matter pools. Accurate assessment of the 14C and 13C inputs to soils by this pathway requires detailed knowledge of the isotopic composition of the soils before the experiments. We have examined the variability of δ13C in soil organic matter in 8 experimental plots prior to the beginning of the 1995-96 FACE experiments with wheat. δ13C variability was higher immediately after harvest of a previous crop in June, but the plots were much more homogeneous five months later immediately before planting. Intervening field management, including disking, plowing and installation of irrigation drip tape likely contributed to mixing the soils.

AB - Free-air CO2 enrichment (FACE) plant-growth experiments conducted in Arizona have allowed a spinoff isotope tracer experiment (tank CO2 is 14C- and 13C-depleted) to follow the input of carbon into soil organic matter pools. Accurate assessment of the 14C and 13C inputs to soils by this pathway requires detailed knowledge of the isotopic composition of the soils before the experiments. We have examined the variability of δ13C in soil organic matter in 8 experimental plots prior to the beginning of the 1995-96 FACE experiments with wheat. δ13C variability was higher immediately after harvest of a previous crop in June, but the plots were much more homogeneous five months later immediately before planting. Intervening field management, including disking, plowing and installation of irrigation drip tape likely contributed to mixing the soils.

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ER -

Field variability of carbon isotopes in soil organic carbon

Abstract

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