Do long season wheat cultivars maximise yield potential under irrigation in subtropical Australia?

Peake, A. S.1, Das, B. T.1, Bell, K. L.2, Gardner, M.3, Poole, N.4.

1 CSIRO Agriculture, P.O. Box 102 Toowoomba QLD 4350 allan.peake@csiro.au

2 Queensland Department of Agriculture and Forestry, PO Box 102, Toowoomba, Qld

3Agricultural Marketing and Production Systems, 46 Dampier Street, Tamworth NSW 2340

4Foundation for Arable Research, 23 High Street, Inverleigh, VIC 3321

Abstract

Irrigated wheat producers in QLD and northern NSW have for the last decade been advised to grow quicker maturing cultivars with high levels of lodging resistance. The recent identification of lodging resistant long-season cultivars has prompted this study to examine whether lodging resistant long-season cultivars possess higher yield potential than quicker maturing cultivars. A key component of the study methodology involved the comparison of long season cultivars (sown early) with quick maturing cultivars (sown later), such that they flowered at the same time. Results showed that early-sown longer season cultivars generally yielded more than the late sown, quick maturing cultivars, but this was not observed consistently across all environments. The yield advantage was predominantly expressed at environments that experienced hot and dry conditions during grain filling where irrigation supply may not have matched crop demand.

Host

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 david_marland@hotmail.com Southern Farming Systems Agriculture Victoria

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