Manipulating flowering time in chickpeas to minimise frost risk, water and heat stress

Muhuddin Rajin Anwar, Yashvir S Chauhan, David J. Luckett, Ryan H.L. Ip, Lancelot Maphosa, Marja Simpson, Rosy Raman, Mark F. Richards, Aaron Preston, Georgina Pengilley, Kristy Hobson, Neroli Graham

Research output: Book chapter/Published conference paperConference paperpeer-review

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Abstract

Cold, heat and soil water deficit, are major abiotic stresses that cause spatial and temporal variation in chickpea yield. Yield losses depend on the stress intensity in relation to the crop’s phenological development. Adjustment of sowing time has been anecdotally used to manipulate flowering time, the most sensitive stage of the crop. However, this approach has limitations since flowering also interacts with soil water and within-season rainfall. In this study, the APSIM-Chickpea model was validated using field experiments. We demonstrate how accounting for improved predictions in flowering time can be used to minimise yield losses. Simulated chickpea crops were “sown” at 10-day intervals from 1-March to 29-July over a 71-year period. Thresholds of cold temperature, seasonal water supply, and extremes of temperature were then examined with respect to chickpea yields. We identified optimal sowing windows that will minimise overlap between flowering, extreme temperatures, and terminal soil water stress, leading to potential improved yields.
Original languageEnglish
Title of host publicationProceedings of the 20th Australian Agronomy Conference
PublisherAustralian Society of Agronomy
Pages1-4
Number of pages4
Publication statusPublished - 2022
Event20th Australian Agronomy Conference - Empire Theatre, Toowoomba, Australia
Duration: 18 Sep 202222 Sep 2022
https://agronomyconference.com/
https://www.agronomyaustraliaproceedings.org/index.php/2022 (Proceedings)
https://az659834.vo.msecnd.net/eventsairseasiaprod/production-expertevents-public/8313fc094e3043ceadc259e62364da10 (Program)

Conference

Conference20th Australian Agronomy Conference
Abbreviated titleSystem solutions for complex problems
Country/TerritoryAustralia
CityToowoomba
Period18/09/2222/09/22
OtherThe theme of the conference is System Solutions for Complex Problems. The theme underpins the need to strengthen collaborations between practitioners and researchers from a wide range of disciplinary backgrounds to address increasingly complex problems and uncertainties. So, the question is not If, but when and how, multidisciplinary collaborations will be developed.
The 20th Australian Agronomy Conference will feature leading international and national speakers addressing issues such as the need to foster soil biology for enduring profitability, carbon sequestration, herbicide resistance, and the interwoven relationships between food production, energy and the environment. We will discuss and share our latest research findings amongst circa 300 agronomists from Australia and the world, as well as farmers, consultants, agribusinesses and farmer peak bodies.
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