Increased carbon stabilization in Australian ferrosol with high carbon saturation deficit

Title
Increased carbon stabilization in Australian ferrosol with high carbon saturation deficit
Publication Date
2017
Author(s)
Khandakar, Tania
Guppy, Christopher
( author )
OrcID: https://orcid.org/0000-0001-7274-607X
Email: cguppy@une.edu.au
UNE Id une-id:cguppy
Tighe, Matthew
( author )
OrcID: https://orcid.org/0000-0003-1027-0082
Email: mtighe2@une.edu.au
UNE Id une-id:mtighe2
Rabbi, Sheikh M F
Daniel, Heiko
Type of document
Journal Article
Language
en
Entity Type
Publication
Publisher
Taylor & Francis Inc
Place of publication
United States of America
DOI
10.1080/00103624.2017.1395447
UNE publication id
une:22642
Abstract
The concept of carbon (C) saturation implies that soils have a finite capacity to store C in a stable form, depending on their silt + clay content. We hypothesized that the stabilization of added organic C would be low in C saturated soil. We tested experimentally the influence of C saturation deficit on stabilization of added grass residue. We incubated 12 highly weathered, oxic soil samples collected from three contrasting land uses (i.e. cropping, improved pasture, and forest) with grass residue for 8 months. Carbon saturation deficit of the forest soils was lower than pasture and cropping soils. After incubation, we found increases in silt + clay associated C in grass residue treatment positively correlated with C saturation deficit of soils. Our results suggest that stabilization of added C was high in soil with low C saturation level and hence higher C saturation deficit.
Link
Citation
Communications in Soil Science and Plant Analysis, 48(15), p. 1772-1780
ISSN
1532-2416
0010-3624
Start page
1772
End page
1780

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