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Heat stress effects on grain sorghum productivity-biology and modelling

Singh, Vijaya and Nguyen, Chuc Thi and Oosterom, Erik van and Jordan, David and Chapman, Scott C. and McLean, Greg (2015) Heat stress effects on grain sorghum productivity-biology and modelling. In: 17th Australian Agronomy Conference, Hobart, Tasmania.

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Article Link(s): http://www.agronomy2015.com.au/papers/agronomy2015...

Abstract

Heat stress can cause sterility in sorghum and the anticipated increased frequency of high temperature events implies increasing risk to sorghum productivity in Australia. Here we summarise our research on specific varietal attributes associated with heat stress tolerance in sorghum and evaluate how they might affect yield outcomes in production environments by a crop simulation analysis. We have recently conducted a range of controlled environment and field experiments to study the physiology and genetics of high temperature effects on growth and development of sorghum. Sorghum seed set was reduced by high temperature effects (>36-38oC) on pollen germination around flowering, but genotypes differed in their tolerance to high
temperature stress. Effects were quantified in a manner that enabled their incorporation into the APSIM sorghum crop model. Simulation analysis indicated that risk of high temperature damage and yield loss depended on sowing date, and variety. While climate trends will exacerbate high temperature effects, avoidance by crop management and genetic tolerance seems possible.

Item Type:Conference or Workshop Item (Paper)
Business groups:Crop and Food Science
Subjects:Science > Statistics > Simulation modelling
Agriculture > Agriculture (General) > Agricultural meteorology. Crops and climate
Plant culture > Field crops > Sorghum
Deposited On:04 Feb 2016 03:54
Last Modified:04 Feb 2016 03:54

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