Researcher(s) |
Lachlan Lake |
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Contact email | lachlan.lake@sa.gov.au |
Year(s) | 2019 |
Contributor | SARDI Minnipa Agricultural Centre |
Trial location(s) |
Minnipa Agricultural Centre, SA
SA, SA |
Pulses are growing in popularity as a result of good prices and rotational benefits such as decreased N input and enhanced grass weed control options. However frost and combinations of water and heat stress at critical growth stages can compromise crop yield. Previous work in pulses has established that the most important time to maintain growth and limit stress is the period around pod set. Sowing date and variety choice are the two main tools to manipulate time of flowering and pod-set, and thus manage the risk of extreme temperatures, water stress and the trade-off between frost and heat risk.
This research aims to identify the safer temperature windows for the critical period for yield for faba bean and lentil in cropping regions of southern Australia. This work follows on from EPFS Summary 2016 p62, EPFS Summary 2017, p146 and EPFS Summary 2018, p62.
• Pulses are more vulnerable to yield loss from heat and frost stress in a critical period centred around early podding.
• Sowing time and variety choice are crucial to reduce risk of stress at this stage.
• We define the safer window for the critical period as less than 10% chance of frost (0oC in the Stevenson screen) and less than 30% chance of heat (>34oC in the Stevenson screen).
• In environments of upper Eyre Peninsula, such as Minnipa, there is limited frost risk, hence early sowing will minimise heat risk and maximise potential yield.
• However, at sites such as Laura (Mid North), there is a safer window after frost and before heat.
• Results should be considered in conjunction with grower specific conditions and the trade-off between early sowing, weed and disease management and rainfall.
The trial was a factorial split plot design with sowing date allocated to main plots and variety to subplots.
Lead research organisation |
South Australian Research and Development Institute |
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Host research organisation |
South Australian Research and Development Institute |
Trial funding source | GRDC DAS00166 |
Related program | N/A |
Acknowledgments |
Special thanks are given to Brenton Spriggs, Sue Budarick, Amanda Pearce, Matthew Cadd and Annabel O’Dea for their collaboration with field and lab activities. This project is funded by and part of GRDC-SARDI Bilateral DAS 00166. |
Other trial partners | Department of Agriculture and Fisheries, Queensland |
Crop types | Grain Legume: Faba beans Grain Legume: Lentils |
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Treatment type(s) |
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Trial type | Experimental |
Trial design | Randomised |
Sow date | 20 April 2019 20th April 2019 |
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Harvest date | Unknown |
Plot size | 1m x 1m |
Plot replication | 3 |
Plot blocking | Split |
Plot randomisation | Random |
Sow date | Not specified |
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Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot blocking | Not specified |
Plot randomisation | Not specified |
Sow date | Not specified |
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Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot blocking | Not specified |
Plot randomisation | Not specified |
Sow date | Not specified |
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Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot blocking | Not specified |
Plot randomisation | Not specified |
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.