Optimising Wheat Maturity X Sowing Date – Sweet Spots for Flowering in CQ

GRDC - Author: Darren Aisthorpe, DAF Queensland

Type: Research Paper
Knowledge level: Advanced

Farm Table says:

The authors of this paper note in the conclusion: “The biggest gains growers can make in maximising wheat production in CQ is simply ensuring that flowering and grain fill take place during the lowest stress period possible for the conditions experienced in that growing year. By bringing your flowering date back into the optimum flowering period (OFP) for your region, it has the potential to lift yields between 20 – 40%, all other variables being equal. Flowering in this period will not only maximise yield potential, but also improve grain size and reduce screenings. It is also within the OFP that genetic advantages/differences between varieties are most able to express themselves, allowing growers to take full advantage of any improvement in yield one variety may have over the competition.”. Please access the full paper via the link below if this research interests you.

The take home messages from this GRDC funded research are below. Please access the full paper via the link below for methodology, references, acknowledgements and discussion.

  • Match optimal flowering period to local growing environment to maximise grain yield potential
  • Timing of sowing opportunities based on varietal selection/availability

Figure 2. Yield response variance from each year’s trial mean yield ploted realative to flowering date. This chart has then been super imposed over the frost and heat stress risk chart for the region. Each dot represent the average yield of a particuar variety at a particular sowing date. The orange dotted line represents the each years average trial yeild, Table 1 lists the value of the orange line for each year of data.

2020 - Australia - GRDC - Author: Darren Aisthorpe, DAF Queensland
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