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Title: Mechanisms controlling soil carbon turnover and their potential application for enhancing carbon sequestration.

Abstract

No abstract prepared.

Authors:
; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
934644
Report Number(s):
ANL/BIO/JA-56538
Journal ID: ISSN 0165-0009; CLCHDX; TRN: US200814%%394
DOE Contract Number:
DE-AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Clim. Change; Journal Volume: 80; Journal Issue: 2007
Country of Publication:
United States
Language:
ENGLISH
Subject:
54 ENVIRONMENTAL SCIENCES; CARBON; CARBON SEQUESTRATION; SOILS

Citation Formats

Jastrow, J. D., Amonette, J. E., Bailey, V. L., and PNNL. Mechanisms controlling soil carbon turnover and their potential application for enhancing carbon sequestration.. United States: N. p., 2007. Web. doi:10.1007/s10584-006-9178-3.
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Jastrow, J. D., Amonette, J. E., Bailey, V. L., & PNNL. Mechanisms controlling soil carbon turnover and their potential application for enhancing carbon sequestration.. United States. doi:10.1007/s10584-006-9178-3.
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Jastrow, J. D., Amonette, J. E., Bailey, V. L., and PNNL. Mon . "Mechanisms controlling soil carbon turnover and their potential application for enhancing carbon sequestration.". United States. doi:10.1007/s10584-006-9178-3.
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@article{osti_934644,
title = {Mechanisms controlling soil carbon turnover and their potential application for enhancing carbon sequestration.},
author = {Jastrow, J. D. and Amonette, J. E. and Bailey, V. L. and PNNL},
abstractNote = {No abstract prepared.},
doi = {10.1007/s10584-006-9178-3},
journal = {Clim. Change},
number = 2007,
volume = 80,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}
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Journal Article:
DOI:  10.1007/s10584-006-9178-3
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    Estimates of forest net primary production (NPP) demand accurate estimates of root production and turnover. We assessed root turnover with the use of an isotope tracer in two forest free-air carbon dioxide enrichment experiments. Growth at elevated carbon dioxide did not accelerate root turnover in either the pine or the hardwood forest. Turnover of fine root carbon varied from 1.2 to 9 years, depending on root diameter and dominant tree species. These long turnover times suggest that root production and turnover in forests have been overestimated and that sequestration of anthropogenic atmospheric carbon in forest soils may be lower thanmore » currently estimated.« less

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    The ability of engineered black carbons (or biochars) to resist abiotic and, or biotic degradation (herein referred to as recalcitrance) is crucial to their successful deployment as a soil carbon sequestration strategy. A new recalcitrance index, the R{sub 50}, for assessing biochar quality for carbon sequestration is proposed. The R{sub 50} is based on the relative thermal stability of a given biochar to that of graphite and was developed and evaluated with a variety of biochars (n = 59), and soot-like black carbons. Comparison of R{sub 50}, with biochar physicochemical properties and biochar-C mineralization revealed the existence of a quantifiablemore » relationship between R{sub 50} and biochar recalcitrance. As presented here, the R{sub 50} is immediately applicable to pre-land application screening of biochars into Class A (R{sub 50} {>=} 0.70), Class B (0.50 {<=} R{sub 50} < 0.70) or Class C (R{sub 50} < 0.50) recalcitrance/carbon sequestration classes. Class A and Class C biochars would have carbon sequestration potential comparable to soot/graphite and uncharred plant biomass, respectively, while Class B biochars would have intermediate carbon sequestration potential. We believe that the coupling of the R{sub 50}, to an index-based degradation, and an economic model could provide a suitable framework in which to comprehensively assess soil carbon sequestration in biochars.« less