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New South Wales DPI
| Researcher(s) |
Felicity Harris Sergio Moroni Hayden Petty Jessica Simpson |
|---|---|
| Year(s) | 2017 |
| Contributor | Department of Primary Industries NSW |
| Trial location(s) |
Wagga Wagga, NSW
|
| Further information | View external link |
The aim of this experiment was to investigate the effect of two commonly used PGRs on root growth. It was hypothesised that if root growth modification occurred due to PGR application it would be a result of either the PGR altering the allometric balance between roots and shoots; a modification of the allocation of photoassimilates between the root and shoot as a consequence of inhibiting shoot growth; or a translocation of PGR from the point of application to the roots to directly influence root growth.
• Plant growth regulator (PGR) application at the recommended time of early stem elongation (Z31) did not alter root or shoot growth in the barley cultivar (cv) CompassA.
• When PGRs were applied during early growth stages (Z12–13) root growth was inhibited or unchanged depending on the active ingredient applied and the application method.
• When PGRs were applied early and when applied as a soil drench they inhibited root growth, but when applied at the recommended time for controlling stem height, PGRs had no effect on root
growth.
| Lead research organisation | N/A |
|---|---|
| Host research organisation | N/A |
| Trial funding source | GRDC DAN00173 |
| Trial funding source | New South Wales DPI DAN201 |
| Related program | N/A |
| Acknowledgments |
This experiment was part of the project ‘Building capacity in southern grains region’, DAN201 2017–18, and ‘Management of barley and barley cultivars for the southern region’, DAN00173 2013–18, with joint investment from GRDC and NSW DPI. This experiment was conducted in collaboration with Charles Sturt University as part of the Agricultural Science course. |
| Other trial partners | Not specified |
| Crop type | Cereal (Grain): Barley |
|---|---|
| Treatment type(s) |
|
| Trial type | Experimental |
| Trial design | Randomised,Replicated,Blocked |
| Sow date | Unknown |
|---|---|
| Harvest date | Unknown |
| Plot size | Not specified |
| Plot replication | 4 |
| Plot blocking | split-split randomised design, blocked by replication with four replicates |
| Plot randomisation | yes |
| Other trial notes |
This research paper is an extract from the publication Southern NSW Research Results 2017, available at |
| # |
Treatment 1
|
Treatment 2
|
Shoot DM (g) | Root DM (g) | Tiller appearance (Tiller/day) |
|---|---|---|---|---|---|
| 1 | █ Untreated control | █ Soil drench | 6.31 | 1.71 | 0.38 |
| 2 | █ Untreated control | █ Foliar application | 4.93 | 1.75 | 0.26 |
| 3 | █ Errex 750 (ai chlormequat chloride) | █ Soil drench | 5.45 | 2.24 | 0.4 |
| 4 | █ Errex 750 (ai chlormequat chloride) | █ Foliar application | 5.87 | 2.32 | 0.35 |
| 5 | █ Moddus® Evo (ai trinexapac ethyl) | █ Soil drench | 2.27 | 0.5 | 0.15 |
| 6 | █ Moddus® Evo (ai trinexapac ethyl) | █ Foliar application | 4.59 | 1.39 | 0.32 |
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.
Plant Breeders’ Rights (PBR)
Some crop varieties used in research trials may be covered by Plant Breeders' Rights (PBR). Users should confirm PBR status of relevant varieties by searching the IP Australia PBR database, http://pericles.ipaustralia.gov.au/pbr_db/ or Variety Central (http://varietycentral.com.au/) and contacting variety owners for further information if required. Where possible, varieties have been listed according to their registered PBR name, although OFT cannot and does not guarantee that the information is accurate or complete.
Note that PBR cover is administered through the Plant Breeders’ Right Act 1994 (