A study of environmental and management drivers of non-CO2 greenhouse gas emissions in Australian agro-ecosystems
Galbally, I., Meyer, M., Bentley, S., Weeks, I., Leuning, R., Kelly, K., Phillips, F., Barker-Reid, F., Gates, W., Baigent, R., Eckard, R., & Grace, P. (2008) A study of environmental and management drivers of non-CO2 greenhouse gas emissions in Australian agro-ecosystems. Environmental Sciences, 2(2-3), pp. 133-142.
Australian climate, soils and agricultural management practices are significantly different from those of the northern hemisphere nations. Consequently, experimental data on greenhouse gas production from European and North American agricultural soils and its interpretation are unlikely to be directly applicable to Australian systems. A programme of studies of non-CO2 greenhouse gas emissions from agriculture has been established that is designed to reduce uncertainty of non-CO2 greenhouse gas emissions in the Australian National Greenhouse Gas Inventory and provide outputs that will enable better on-farm management practices for reducing non-CO2 greenhouse gas emissions, particularly nitrous oxide. The systems being examined and their locations are irrigated pasture (Kyabram Victoria), irrigated cotton (Narrabri, NSW), irrigated maize (Griffith, NSW), rain-fed wheat (Rutherglen, Victoria) and rain-fed wheat (Cunderdin, WA). The field studies include treatments with and without fertilizer addition, stubble burning versus stubble retention, conventional cultivation versus direct drilling and crop rotation to determine emission factors and treatment possibilities for best management options. The data to date suggest that nitrous oxide emissions from nitrogen fertilizer, applied to irrigated dairy pastures and rain-fed winter wheat, appear much lower than the average of northern hemisphere grain and pasture studies. More variable emissions have been found in studies of irrigated cotton/vetch/wheat rotation and substantially higher emissions from irrigated maize.
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|Item Type:||Journal Article|
|Keywords:||Greenhouse gas emissions, National inventory, agriculture, best management practices, nitrous oxide|
|Subjects:||Australian and New Zealand Standard Research Classification > ENVIRONMENTAL SCIENCES (050000) > ENVIRONMENTAL SCIENCE AND MANAGEMENT (050200)|
|Divisions:||Past > Institutes > Institute for Sustainable Resources|
|Deposited On:||06 Feb 2012 08:12|
|Last Modified:||29 Feb 2012 23:31|
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