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dc.contributor.authorJohnson, Chris E
dc.contributor.authorBlumfield, Timothy J
dc.contributor.authorBoyd, Sue
dc.contributor.authorXu, Zhihong
dc.date.accessioned2017-05-03T11:29:50Z
dc.date.available2017-05-03T11:29:50Z
dc.date.issued2013
dc.date.modified2014-01-09T23:07:43Z
dc.identifier.issn1439-0108
dc.identifier.doi10.1007/s11368-013-0676-4
dc.identifier.urihttp://hdl.handle.net/10072/55467
dc.description.abstractPurpose Residue retention is important for nutrient and water economy in subtropical plantation forests. We examined decomposing hoop pine (Araucaria cunninghamii Ait. Ex D. Don) residues-foliage, branches, and stem wood-to determine the changes in structural chemistry that occur during decomposition. Materials and methods Residues were incubated in situ using 0.05 m2 microplots. We used solid-state 13C nuclear magnetic resonance (NMR) spectroscopy to determine the structural composition of harvest residues in the first 24 months of decomposition. Results and discussion The spectral data for branch and stem residues were generally similar to one another and showed few changes during decomposition. The lignin content of branch and foliage residues decreased during decomposition. When residues were mixed together during decomposition, the O-alkyl fraction of foliage decreased initially then increased up to 24 months, while the alkyl carbon (C) fraction exhibited the opposite pattern. The decomposition of woody hoop pine residues (branch and stem wood) is surprisingly uniform across the major C forms elucidated with 13C NMR, with little evidence of preferential decomposition. When mixed with branch and stem materials, foliage residues showed significant short- and long-term compositional changes. This synergistic effect may be due to the C/N ratio of the treatments and the structure of the microbial decomposer community. Conclusions Twenty-four months of decomposition of hoop pine residues did not result in substantial accumulation of recalcitrant C forms, suggesting that they may not contribute to long-term C sequestration.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoeng
dc.publisherSpringer
dc.publisher.placeGermany
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom854
dc.relation.ispartofpageto862
dc.relation.ispartofissue5
dc.relation.ispartofjournalJournal of Soils & Sediments
dc.relation.ispartofvolume13
dc.rights.retentionY
dc.subject.fieldofresearchEarth sciences
dc.subject.fieldofresearchEnvironmental sciences
dc.subject.fieldofresearchAgricultural, veterinary and food sciences
dc.subject.fieldofresearchcode37
dc.subject.fieldofresearchcode41
dc.subject.fieldofresearchcode30
dc.titleA 13C NMR study of decomposing logging residues in an Australian hoop pine plantation
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.date.issued2013
gro.hasfulltextNo Full Text
gro.griffith.authorXu, Zhihong
gro.griffith.authorBlumfield, Tim J.


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