Composition and quality of harvest residues and soil organic matter under windrow residue management in young hoop pine plantations as revealed by solid-state C-13 NMR spectroscopy

Mathers, N. J., Xu, Z. H., Blumfield, T. J., Berners-Price, S. J. and Saffigna, P. G. (2003) Composition and quality of harvest residues and soil organic matter under windrow residue management in young hoop pine plantations as revealed by solid-state C-13 NMR spectroscopy. Forest Ecology And Management, 175 1-3: 467-488. doi:10.1016/S0378-1127(02)00182-2


Author Mathers, N. J.
Xu, Z. H.
Blumfield, T. J.
Berners-Price, S. J.
Saffigna, P. G.
Title Composition and quality of harvest residues and soil organic matter under windrow residue management in young hoop pine plantations as revealed by solid-state C-13 NMR spectroscopy
Journal name Forest Ecology And Management   Check publisher's open access policy
ISSN 0378-1127
Publication date 2003-01-01
Sub-type Article (original research)
DOI 10.1016/S0378-1127(02)00182-2
Open Access Status Not yet assessed
Volume 175
Issue 1-3
Start page 467
End page 488
Total pages 22
Editor R. F. Fisher
G. M. J. Mohren
Place of publication Netherlands
Publisher Elsevier BV
Language eng
Subject C1
300600 Forestry Sciences
620300 Forestry
Abstract Solid-state C-13 nuclear magnetic resonance (NMR) with cross-polarisation (CP) and magic-angle-spinning (MAS) was used to: (a) examine the changes in carbon (C) composition of windrowed harvest residues during the first 3 years of hoop pine plantations in subtropical Australia; (b) assess the impacts of windrowed harvest residues on soil organic matter (SOM) composition and quality in the 0-10 cm soil layer. Harvest residues were collected from 0-, 1-, 2- and 3-year-old windrows of ca. 2.5 m width (15 m apart for 0-, 1- and 2-year-old sites and 10 m apart for 3-year-old site). Soils from the 0 to 10 cm soil layer were collected from the 1-, 2- and 3-year-old sites. The 13C NMR spectra of the harvest residues indicated the presence of lignin in the hoop pine wood, foliage and newly incorporated organic matter (NIOM). Condensed tannin structures were found in the decay-resistant bark, small wood and foliage, but were absent in other residue components and SOM. The NMR spectra of small wood samples contained condensed tannin structures because the outer layer of bark was not removed. NIOM showed a shift from foliage-like structures (celluloses) to lignin-type structures, indicating an incorporation of woody residues from the decomposing harvest residues. Suberins were also present in the small wood, foliage and bark. The 13C CP NMR spectra of SOM indicated that in areas where windrows were present, SOM did not show compositional changes. However, an increase in SOM quality under the windrows in the second year after their formation as characterised by the alkyl C/O-alkyl C (A/O-A) ratio was mainly due to inputs from the decomposition of the labile, readily available components of the windrowed harvest residues. (C) 2002 Published by Elsevier Science B.V.
Keyword Forestry
Nuclear Magnetic Resonance
Cross-polarisation
Hoop Pine
Nuclear-magnetic-resonance
Subtropical Australia
Litter Decomposition
Humic Substances
Growth-response
Coastal Forests
Woody Debris
Cpmas-nmr
Carbon
Components
Q-Index Code C1
Institutional Status UQ

 
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Created: Wed, 15 Aug 2007, 05:40:17 EST