Ref ID: 9665
Ref Type: Journal
Authors: Mao, X. A., Xu, Z. H., Luo, R. S., Mathers, N. J., Zhang, Y. H., and Saffigna, P. G.
Pub Date: 2002
Journal Name: Australian Journal of Soil Research
Volume: 40
Issue: 5
Start Page: 717
End Page: 726
ISBN/ISSN:
Keywords: ammonium-N/Araucaria cunninghamii/biochemical/chemical/component/composition/concentration/dermosols/ecosystem/Eucalyptus/Eucalyptus pilularis/forest/harvest residues/hoop pine/humic/humic acid/humic acids/indicator/ITS/kandosols/magnetic/management/N/N-14/nitrate/nitrate-N/nitrogen/NMR/NMR spectroscopy/nuclear/organic/pine hybrid/Pinus/plant/prescribed burn/prescribed burning/process/productivity/quality/Queensland,Australia/report/residue/residue management/resonance/response/soil/soil organic matter/spectroscopy/study/sustainability
Abstract: Ecosystem management such as plant residue retention and prescribed burning can significantly affect soil organic matter (SOM) composition and thereby the closely associated (C) and nitrogen (N) cycling processes, which underpin terrestrial ecosystem productivity and sustainability. Humic acid (HA) is an important SOM component and its chemical composition has attracted much attention. Here we report the first application of N-14 nuclear magnetic resonance (NMR) spectroscopy to soil HA study, revealing the surprising existence of nitrate-N and ammonium-N in the HAs. This newly discovered HA nitrate-N, though in a relatively low concentrations, is closely related to soil N availability and responsive to plant residue management regimes in contrasting forest ecosystems. The HA nitrate-N may be a useful and sensitive biochemical indicator of SOM quality in response to different ecosystem management regimes
Notes: Entered by Nicole Mathers (15/2/2002)
Reprint: Not in File
Program: SPF Sustainable Management
Project: B2
Deliverable: B2-1.1
Confidentiality: Public
Availability: Authors;
Report: Annual Report 2001/2; Annual Report 2002/3
Type: Article
Address: zhihong.xu@dpi.qld.gov.au