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

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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 13C NMR spectroscopy
Author Mathers, Nicole; Xu, Zhihong; Blumfield, Timothy John; Berners-Price, Sue; Saffigna, Paul Gio
Journal Name Forest Ecology and Management
Year Published 2003
Place of publication Netherlands
Publisher Elsevier
Abstract Solid-state 13C 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.
Peer Reviewed Yes
Published Yes
Publisher URI http://www.elsevier.com/wps/find/journaldescription.cws_home/503310/description#description
Alternative URI http://dx.doi.org/10.1016/S0378-1127(02)00182-2
Copyright Statement Copyright 2003 Elsevier. Please refer to the journal's website for access to the definitive, published version.
Volume 175
Page from 467
Page to 488
ISSN 0378-1127
Date Accessioned 2003-11-10
Date Available 2009-09-02T07:42:43Z
Language en_AU
Research Centre Environmental Futures Research Institute; Institute for Glycomics
Faculty Faculty of Environmental Sciences
Subject PRE2009-Forestry Sciences
URI http://hdl.handle.net/10072/6086
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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