Researcher(s) |
Tom Price Darcy Warren |
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Year(s) | 2023 |
Contributor | Field Applied Research (FAR) Australia |
Trial location(s) |
Hart field site, SA
Kinnabulla, VIC |
Related trials |
To investigate barley management options to close the yield gap and reduce pre-harvest losses
This investment will deliver a series of field trials and extension activities to reduce the yield gap between attainable yield and water limited yield potential in barley in the low – medium rainfall zones alongside virtual trial treatments derived by crop models to determine new attainable yield benchmarks for barley growers.
Hart:
• Barley grain yield averaged 4.61 t/ha with yields ranging from 3.82 to 5.42 t/ha resulting from variety choice and different management strategies. • High fungicide inputs were required to maximise grain yield for RGT Planet, Cyclops and Leabrook across two consecutive years. High fungicide input was most profitable in varieties with leaf rust susceptibility and with high infection levels during grain fill. In the absence of leaf rust, high fungicide inputs were not economical in this trial. • There were no yield gains resulting from increasing nitrogen (N) application from low to high (60 – 140 kg N/ha). RGT Planet grain yields decreased in response to increasing nitrogen supply. High N supply also increased grain protein for all varieties, preventing them from meeting malt receival specifications. • The application of plant growth regulators (PGRs) reduced crop lodging at the early time of sowing, however no yield increases were observed. • The use of simulated grazing at growth stage (GS) GS30 resulted in a significant yield reduction for RGT Planet and Leabrook of 220 kg/ha and 180 kg/ha, respectively. No yield reduction was observed for Cyclops.
Kinnabulla:
• With high starting soil fertility (240kg N 0-100cm), high nitrogen rates are not required to maximise grain yield. • With a grain yield of 5.93t/ha, Cyclops outyielded both RGT Planet and Leabrook which yielded 4.34t/ha and 5.10t/ha respectively. • When sowing disease susceptible varieties early, increased fungicide applications are required to maximise grain yield. • The first fungicide application (start of stem elongation) was the most crucial fungicide timing in terms of protecting the crop and maximising final yield.
Lead research organisation |
Field Applied Research (FAR) Australia |
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Host research organisation | N/A |
Trial funding source | GRDC FAR2204-002SAX |
Related program | N/A |
Acknowledgments |
This research was funded by the GRDC as part of the National Grower Network project ‘Barley management options to close the yield gap and reduce pre-harvest losses’ (FAR2204-002SAX). |
Other trial partners | Not specified |
Crop type | Cereal (Grain): Barley |
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Treatment type(s) |
|
Trial type | |
Trial design |
Sow rate or Target density | 180 seeds/m2 (target plant density of ~150 Plants/m2) |
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Sowing machinery | Not specified |
Sow date | 27th April and 1st June 2023 |
Harvest date | 23rd October and 3rd November 2023 |
Trial design method | SPD Split Plot Design |
Plot size | 1.75m x 10.0m |
Plot replication | 4 |
Psuedoreplication | N |
Plot randomisation | N |
Fertiliser |
Seeding: MAP @ 60 kg/ha Please refer to table 4 in trial report for treatment details |
Herbicide | Not specified |
Insecticide | Not specified |
Fungicide |
Please refer to table 4 and 5 in trial report for treatment details |
Seed treatment | Not specified |
Sow rate or Target density | 130 plants/m² |
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Sowing machinery |
Knife points, press wheels, 30cm row spacing. |
Sow date | TOS1: 1 May 2023; TOS2: 16 May 2023 |
Harvest date | 10th December 2022 |
Trial design method | SPD Split Plot Design |
Plot size | Not specified |
Plot replication | 4 |
Psuedoreplication | Not specified |
Plot randomisation | Y |
Fertiliser |
60kg/ha Granulock Supreme Z @ sowing. Refer to table 1 for in crop applied nitrogen rates |
Herbicide |
Trial managed as per best practice. |
Insecticide |
Trial managed as per best practice. |
Fungicide | Not specified |
Seed treatment | Standard seed treatment of Raxil and Goucho, refer to table 2 for additional seed treatment |
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.