How does residue management impact soil organic matter composition and quality under Eucalyptus globulus plantations in southwestern Australia?

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Title How does residue management impact soil organic matter composition and quality under Eucalyptus globulus plantations in southwestern Australia?
Author Mathers, Nicole; Mendham, Daniel S.; O'Connell, Anthony M.; Grove, Timonthy S.; Xu, Zhihong; Saffigna, Paul Gio
Journal Name Forest Ecology and Management
Editor R F Fisher, G M J Mohren
Year Published 2003
Place of publication Netherlands
Publisher Elsevier BV
Abstract This study investigated the influence of harvest residue management practices on soil organic matter (SOM) composition and quality from two second-rotation Eucalyptus globulus plantations in southwestern Australia, using solid-state 13C nuclear magnetic resonance (NMR) spectroscopy with cross-polarisation and magic-angle-spinning (CPMAS). Soil samples (0–5 cm) were collected every 12 months for 5 years from two sites that had contrasting soil types and fertility. Harvest residue management treatments established at both sites were (a) no harvest residues; and (b) double harvest residues. The use of 13C CPMAS and DD NMR spectroscopy enabled the successful non-destructive detection of SOM quality changes in the two E. globulus plantations. Relative intensities of 13C CPMAS NMR spectral regions were similar at both sites, and for both harvest residue treatments, indicating that SOM composition was also similar. Dipolar dephasing (DD) NMR spectra revealed resonances in SOM assigned to lignin and tannin structures, with larger resonances in the carbonyl and alkyl C regions that were indicative of cuticular material, enabling detection of changes in SOM quality. Retention of double harvest residues on the soil surface increased the soil quality compared with removal of all harvest residues at both sites as indicated by the NMR aromaticities, but this was most noticeable at Manjimup, which had greater initial soil fertility.
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)00527-3
Copyright Statement Copyright 2003 Elsevier. Please refer to the journal's website for access to the definitive, published version.
Volume 179
Page from 253
Page to 267
ISSN 0378-1127
Date Accessioned 2004-03-24
Language en_AU
Research Centre Environmental Futures Research Institute
Faculty Faculty of Environmental Sciences
Subject PRE2009-Science & Technology
URI http://hdl.handle.net/10072/5995
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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