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| Researcher(s) |
Felicity Harris Peter Matthews Jess Perry Jennifer Pumpa Peter Roberts |
|---|---|
| Year(s) | 2019 |
| Contributor | Department of Primary Industries NSW |
| Trial location(s) |
South Bowen Park, Cudal, NSW
|
| Further information | View external link |
In 2019, field experiments were conducted across various sites in the GRDC northern grains region (NGR) to determine how phenology influences grain yield responses for a diverse set of wheat genotypes. This paper presents results from the Cudal site (central eastern NSW) and discusses the sowing date influence on the phenology and grain yield responses from a core set of 36 wheat genotypes.
• The 2019 dry spring conditions affected genotype performance, influencing flowering time and grain yield responses.
• Current varieties were not broadly adapted across sowing dates from mid April to late May.
• Highest grain yields were achieved across phenology types in response to sowing dates, with very slow spring types maximising yield from the mid April sowing date (SD), with later sowing dates favouring faster developing spring genotypes, which achieved the highest grain yields in 2019.
The 2019 season was one of the driest on record and included several frosts during the critical stem elongation phase through August and September, followed by periods of heat shock at flowering and grain fill for many of the genotypes included in the experiment. The season favoured the very fast–fast developing genotypes, sown mid–late May (SD2 and SD3), where flowering time avoided frost damage and grain filling occurred before the onset of severe moisture and heat stress. The relationship and development patterns of the genotypes, even in a 1:100 year event, were consistent with previous years’ experimental findings with genotype performance driven by seasonal conditions. No one genotype maturity group was adapted to all three sowing dates in 2019, supporting previous work that growers can maximise grain yield by selecting varieties that target the OFP based on seasonal sowing opportunities
| Lead research organisation | N/A |
|---|---|
| Host research organisation | N/A |
| Trial funding source | GRDC BLG104 |
| Trial funding source | DPI NSW |
| Related program | N/A |
| Acknowledgments |
This experiment was part of the ‘Optimising grain yield potential of winter cereals in the northern grains region’ project, BLG104, 2017–20, a joint investment by GRDC and NSW DPI under the Grains Agronomy and Pathology Partnership (GAPP). |
| Other trial partners | Not specified |
| Crop type | Cereal (Grain): Wheat |
|---|---|
| Treatment type(s) |
|
| Trial type | Experimental |
| Trial design | Replicated |
| Sow rate or Target density | 160 plants/m2 |
|---|---|
| Sowing machinery |
Direct drilled with Horwood Bagshaw seeding units, spaced at 220 mm using a GPS auto-steer system |
| Sow date | Please see report for treatment details |
| Harvest date | 28 November 2019 |
| Plot size | Not specified |
| Plot replication | Not specified |
| Fertiliser |
• 100 kg/ha mono-ammonium phosphate (MAP) (sowing) • 150 kg/ha urea (sowing) |
| Herbicide |
Knockdown: Glyphosate (450 g/L) 2.0 L/ha Pre-sowing: Sakura® (850 g/ka pyroxasulfone) 118 g/ha + Avadex® Xtra (500 g/L tri-allate) 1.6 L/ha + trifluralin (480 g/L) 1.6 L/ha (SD1: 17 April, SD2: 6 May and SD3: 20 May) In-crop: Axial® (100 g/L pinoxaden and 25 g/L cloquintocet-methyl) 300 mL/ha + Precept® (125 g/L MCPA and 25 g/L pyrasulfotole) 2 L/ha + Adigor® (adjuvant) 500 mL per 100 L water (18 June) |
| Fungicide |
• Seed treatment: Hombre® Ultra (360 g/L imidacloprid and 12.5 g/L tebuconazole) 200 mL/100 kg seed • Fertiliser treatment: Flutriafol (250 g/L) 400 mL/ha • In-crop: Prosaro® 420 SC (210 g/L prothioconazole and 210 g/L tebuconazole) 300 mL/ha (15 August) |
| Pesticide |
Talstar® 250 EC (250 g/L bifenthrin) 80 mL/ha (23 May) • Aphidex® WG (500 g/kg pirimicarb) 250 g/ha (15 August and 17 September) • Fastac® Duo (100 g/L alpha-cypermethrin) 100 mL/ha (17 September) |
| Other trial notes |
This research paper is an extract from the publication Southern NSW Research Results 2021, available at |
SILO weather estimates sourced from https://www.longpaddock.qld.gov.au/silo/
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