Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/13474
Title: Nitrous oxide emissions from acidic Black Vertosol: effects of residues, nitrogen additions and pH
Contributor(s): Begum, Nazma  (author); Guppy, Christopher  (supervisor)orcid ; Herridge, David  (supervisor)orcid ; Schwenke, Graeme  (supervisor)orcid 
Conferred Date: 2013
Copyright Date: 2012
Open Access: Yes
Handle Link: https://hdl.handle.net/1959.11/13474
Abstract: Agricultural soils are a major source of atmospheric nitrous oxide (N₂O), a potent greenhouse gas contributing approximately 6% of the total radiative forcing from anthropogenic greenhouse gas emissions. Vertosols are the major soil type throughout much of the grain-growing areas of northern NSW and southern Queensland in Australia. In these areas, cultivation of grain legumes, retention of crop residues after grain harvest and increased use of fertilizer-nitrogen (N) are common practices, all of which are potentially important sources of N₂O emissions. Vertosols are fine-textured and have poor internal drainage, which can lead to greater periods of saturated, anaerobic conditions conducive to N₂O emissions through denitrification. This underlines the need to better understand the relative contribution of different N sources (i.e. fertilizer-N, crop residue-N, biologically-fixed N₂) to N₂O emissions from cropped Vertosols in order to define the least emitting system. The long-term aim is reduction of N₂O emissions from Australian agricultural systems. In the five experiments reported in this thesis, I examined the relative effects of fertilizer-N rates and biologically-fixed N₂ on N₂O emissions from an acidic Black Vertosol and further examined the effects of residue sources, particularly root versus shoot, and soil pH on N₂O emissions from the same soil.
Publication Type: Thesis Doctoral
Fields of Research (FoR) 2008: 050304 Soil Chemistry (excl Carbon Sequestration Science)
Fields of Research (FoR) 2020: 410604 Soil chemistry and soil carbon sequestration (excl. carbon sequestration science)
Socio-Economic Objective (SEO) 2008: 830499 Pasture, Browse and Fodder Crops not elsewhere classified
Rights Statement: Copyright 2012 - Nazma Begum
HERDC Category Description: T2 Thesis - Doctorate by Research
Appears in Collections:School of Environmental and Rural Science
Thesis Doctoral

Files in This Item:
9 files
File Description SizeFormat 
Show full item record

Page view(s)

2,698
checked on May 26, 2024

Download(s)

222
checked on May 26, 2024
Google Media

Google ScholarTM

Check


Items in Research UNE are protected by copyright, with all rights reserved, unless otherwise indicated.