Is gibberellic acid application a useful tool for increasing the grazing value of oats in the Victorian Mallee?

Jessica Lemon1, Genevieve Clarke2, Ashley Wallace2

1 Birchip Cropping Group, PO Box 85, Birchip, Vic, 3483, 

2 Department of Economic Development, Jobs, Transport and Resources, 110 Natimuk Rd, Horsham, VIC, 3400


Oats are an important enterprise diversity option for north-west Victoria . Gibberellic acid (GA)  may have the potential to assist in filling the early Autumn feed gap by shifting the peak in the growth curve forward (increasing early growth), due to its ability to boost biomass shortly after application in a number of pasture grasses (Arnold et al. 1967). The response of cereal oats to GA however is not well understood. This research was conducted to give growers a better understanding of the effects of GA on oats in terms of changes to production, plant recovery following grazing for hay and grain yields and likely economics.

Oat biomass showed no response to GA application throughout the season, however biomass was decreased in response to a single grazing event. Similarly, application of GA had no effect on oat feed or hay quality. Average grain yield was 4.2t/ha with no interaction between any treatment (GA timing or grazing) on protein or moisture. However, test weight increased as a result of grazing independent of GA application or timing.


The Australian Society of Agronomy is the professional body for agronomists in Australia. It has approximately 500 active members drawn from government, universities, research organisations and the private sector.

Photo Credits

David Marland Photography Southern Farming Systems Agriculture Victoria

Conference Managers

Please contact the team at Conference Design with any questions regarding the conference.
© 2015 - 2017 Conference Design Pty Ltd