Ref ID: 11031
Ref Type: Journal
Authors: Blumfield, T. J., Xu, Z. H., and Chen, C. R.
Pub Date: 2005
Journal Name: Forest Ecology and Management
Volume: 204
Issue: 1
Start Page: 129
End Page: 135
ISBN/ISSN:
Keywords: mineral/nitrogen/Nitrogen Dynamics/dynamics/soil/compaction/cultivation/hoop pine/pine/pine plantation/plantation/plantation establishment/establishment/effect/N/experiment/early/Second rotation/rotation/Araucaria/Araucaria cunninghamii/Queensland/Australia/weight/nitrate/nitrate-N/form/soils/ammonium/ammonium-N/impact/leaching
Abstract: The effects of soil compaction and cultivation on soil mineral N dynamics were investigated through an 18-month, in situ N mineralization experiment during the inter-rotation and early establishment period of a second rotation (2R) hoop pine (Araucaria cunninghamii Aiton ex A. Cunn) plantation in southeast Queensland, Australia. Treatments were 0, 1 and 16 passes of a fully laden forwarder (gross weight, 40.2 Mg) and cultivation by disc plough (zero cultivation and cultivation). Nitrate N was the dominant form of mineral N throughout the 18-month sampling period in both non-cultivated and cultivated soils, varying between 10 and 40 kg ha-1 whilst ammonium N remained <10 kg ha-1. Compaction had no significant effect on N mineralization or nitrification. However, the remediation of the effects of compaction on soil through the use of the disc plough had significant impacts on N mineralization, nitrification and N leaching. On a seasonal basis, the mean net N mineralization increased from around 30 to 53 kg ha-1, nitrification from 28 to 43 kg ha-1 and nitrate N leaching from around 10 to 73 kg ha-1 following cultivation.
Notes:
Reprint: Not in File
Program: SPF Sustainable Management
Project: B2
Deliverable: 2.2
Confidentiality: Public
Availability:
Report: Annual Report 2004/5
Type:
Address: t.blumfield@griffith.edu.au