Nick Poole (FAR Australia)
Michael Straight (FAR Australia)
When canola was sown into wheat stubble in an east-west direction, long stubble (42cm) significantly reduced photosynthetically active radiation (PAR) and reduced true leaf number up to mid-winter.
Although there were trends suggesting a reduction in dry matter (DM) production at the yellow bud stage (GS3.7) as a result of increasing stubble height, the differences were not statistically significant.
The average canola yield of the trial was 1.58t/ha with no significant differences in either yield or oil content due to stubble height of the previous wheat crop.
The results mirror a trial conducted at Dookie, where yields in long stubble were 3.70t/ha and 3.75t/ha in short stubble. At this site there were significant reductions in DM production early in the season in the long stubble treatment.
|Lead research organisation||
|Host research organisation||
|Trial funding source||GRDC RPI00009|
This work was carried out as part of the GRDC investment Maintaining profitable farming systems with retained stubble in the Riverine Plains region (2013–18).
|Other trial partners||Foundation for Arable Research Australia (FAR Australia)|
|Sow date||2 May 2017|
|Harvest date||21 November 2017|
|Plot size||Not specified|
|Plot replication||Not specified|
|@T1: GS1.04||@T2: GS3.7||@T3: GS6.7|
||Oil (%)||Yield (t/ha)||Canola establishment (plants/m2)||Dry matter (t/ha)||Dry matter (t/ha)|
|1||█ Short (12cm)||46.1||1.57||34||2.17||6.95|
|1||█ Medium (21cm)||46.6||1.47||37||1.9||6.81|
|1||█ Long (42cm)||45.6||1.69||35||1.88||6.85|
|Rainfall trial gsr (mm)||270mm|
SILO weather estimates sourced from https://www.longpaddock.qld.gov.au/silo/
Jeffrey, S.J., Carter, J.O., Moodie, K.B. and Beswick, A.R. (2001). Using spatial interpolation to construct a comprehensive archive of Australian climate data , Environmental Modelling and Software, Vol 16/4, pp 309-330. DOI: 10.1016/S1364-8152(01)00008-1.