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Type: Conference paper
Title: Characterising the risk of heat stress on wheat in South Australia: meteorology, climatology and the design of a field heating chamber
Author: Alexander, B.
Hayman, P.
McDonald, G.
Talukder, A.
Gill, G.
Citation: "Food Security from Sustainable Agriculture": Proceedings of the 15th Australian Agronomy Conference, held in Lincoln New Zealand, 15-18 November 2010 / H. Dove and R. Culvenor (eds.)
Publisher: Australian Society of Agronomy
Publisher Place: NSW, Australia
Issue Date: 2010
Conference Name: Australian Agronomy Conference (15th : 2010 : Lincoln, New Zealand)
Statement of
Bronya Alexander, Peter Hayman, Glenn McDonald, A. S. M. Hasim Talukder and Gurjeet Gill
Abstract: High temperatures during spring have long been recognised as one of the weather risks for grain farmers. Recent events such as 12 October 2004 and 15 November 2009 raise questions about the likelihood of this risk and the consequences on grain crops. This paper reports on work first characterising the likelihood of heat events by considering meteorology (synoptic weather patterns) and climatology (analysis of climate records) and second studying the consequences by reproducing these heat events in the field using a purpose built chamber. Spring heat events in the SA grains belt are due to a northerly flow of air associated with a passing high pressure system to the east of the region and an approaching cold front to the west. Analysing the climatology of heat events in the context of crop phenology typical of a region, it is apparent that a medium rainfall region like Roseworthy (flowering later in October) may be at a greater risk of heat events than a much warmer, low rainfall location like Minnipa (flowering in September). Preliminary results indicate that a relatively inexpensive chamber can be used to impose a single day heat event in the field (maximum temperature of 35°C). The chamber was able to heat by up to 12°C above ambient.
Keywords: High temperatures; spring heat events; Australian grains belt; phenology; humidity; thermal regulation
Rights: Copyright © 2010. Individual authors retain copyright in abstracts published in the Abstracts Book and papers published online for the 15th ASA Conference 2010. The Regional Institute Ltd retains the non-exclusive right to online publication of the papers from the conference.
RMID: 0020112486
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Appears in Collections:Agriculture, Food and Wine publications

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