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Researcher(s) |
Felicity Harris Hugh Kanaley Danielle Malcolm Jessica Simpson |
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Year(s) | 2017 |
Contributor | Department of Primary Industries NSW |
Trial location(s) |
Marrar, NSW
|
Further information | View external link |
The primary objective of PGRs is to decrease plant height to reduce lodging, however, this can also indirectly increase grain yield. If the crop is not lodged, the effect of PGR application on yield is more variable. The influence of varying levels of N and PGR timing on the grain yield of four elite barley cultivars, including the recently released RGT PlanetA, was investigated at Marrar in 2017.
• Plant growth regulators (PGRs) had minimal effects on the plant height of different barley varieties.
• PGRs reduced some lodging, however, this occurred predominantly in the taller cultivar (cv) prone to lodging (cv. CompassA).
• Neither PGR nor nitrogen (N) application increased grain yield.
• PGRs should be strategically applied, taking into account the interaction between cultivar, seasonalconditions, and application timing.
A complete factorial design consisting of treatment combinations of cultivars, applied N and plant
growth regulators were included.
Lead research organisation |
Department of Primary Industries NSW |
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Host research organisation | N/A |
Trial funding source | GRDC DAN00173 |
Trial funding source | DPI NSW |
Related program |
Management of Barley and Barley Cultivars for the Southern Region |
Acknowledgments |
This experiment was part of the project ‘Management of barley and barley cultivars for the southern region’, DAN00173, 2013–18, with joint investment by GRDC and NSW DPI. |
Other trial partners | Not specified |
Crop type | Cereal (Grain): Barley |
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Treatment type(s) |
|
Trial type | Experimental |
Trial design | Replicated |
Sowing machinery |
Direct drilled with DBS tines, 250 mm row spacing, GPS auto-steer system |
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Sow date | 10 May 2017 |
Harvest date | Unknown |
Plot size | Not specified |
Plot replication | Not specified |
Psuedoreplication | Not specified |
Fertiliser |
80 kg/ha mono-ammonium phosphate (MAP) applied at sowing (N: 10, P [phosphorus]: 22, K [potassium]: 0, S [sulfur]: 2) |
Herbicide |
Pre-emergent (9 May): Diuron® 900 WDG at 350 mL/ha + Bouncer® at 350 g/ha |
Fungicide |
Seed treatment: Hombre® Ultra at 2 mL/kg |
Pesticide |
Aphidex® WG 500 at 150 g/ha |
Seed treatment | Seed treatment: Hombre® Ultra at 2 mL/kg In-crop (11 Aug): TILT®Xtra at 500 mL/ha |
Other trial notes |
This research paper is an extract from the publication Southern NSW Research Results 2018, available at |
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.