Dr Liqi Han will present his seminar Digital Twins for Optimisation of Orchard Spray Practices on Tuesday 11 October 2022 between 12:00 – 1:00pm via Zoom.

The Great Barrier Reef is under increasing threat by water pollution where run-off agrochemicals play a major role. Reducing pesticide application while keeping agriculture growing is pivotal to the 2050 Water Quality Improvement Plan, the 2050 Zero Net Emission Target, and the Ag2030 Goal. This project has developed a Digital Horticulture technology integrating digital twins, parallel computing and AI to help minimise the off-target pesticides. It was verified through an experiment where the digital-twin simulation matches the field results. A following digital-twin-based investigation has suggested that orchard spray drift could be significantly reduced by minor adjustments of existing sprayers. This research project is funded by the Queensland Reef Water Quality Program - Digital Horticulture, UQ and support from the Queensland Department of Agriculture and Fisheries.

Originally from a computer science background, Dr Liqi Han has been working with plant scientists and horticulturalists for more than 16 years, using his IT skills to help explore plant signalling, carbon transport, light interception and distribution as well as spray dynamics. At UQ's Queensland Alliance for Agriculture and Food Innovation (QAAFI), Liqi has led the development of a high-performance ray tracer and an orchard simulator to improve horticultural designs for better light quality for better yield. He has also been responsible for a project to innovate digital-twin technologies (powered by high-performance computing and artificial intelligence) to reduce horticultural spray drift to protect the Great Barrier Reef.


About Science Seminars

Queensland Alliance for Agriculture and Food Innovation hosts science seminars across the disciplines of animal, horticulture, crop, food and nutritional sciences.

With a range of speakers from Australia and abroad, the series explores how high-impact science will significantly improve the competitiveness and sustainability of the tropical and sub-tropical food, fibre and agribusiness sectors.

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The Queensland Alliance for Agriculture and Food Innovation is a research institute at The University of Queensland supported by the Queensland Government via the Queensland Department of Agriculture and Fisheries.