Growers’ Feedback Sought on Sugarcane Root Systems Demonstration

Sugarcane growers in the Central district are being invited to share their insights as part of a new Sugar Research Australia (SRA) demonstration examining root system differences across sugarcane varieties and what they could mean for crop management.

Interest in root systems has been growing among local growers, particularly around how different varieties establish and perform under varying conditions. That interest helped spark a proof-of-concept project by Sugar Research Australia Central, following a presentation attended by Senior Variety Development Manager George Piperidis on assessing sugarcane root systems.

The demonstration forms part of the current District Productivity Plan and aims to capture grower experience with established varieties to help inform the management of newer varieties with similar root characteristics.

The trial began on 27 June 2025, with 15 sugarcane varieties collected from SRA plots across the Central district. These included established varieties, recently released varieties and promising clones. Single-eye setts were prepared, germinated under controlled conditions and then transplanted into mesh cylinders within pots to allow detailed observation of root growth.

Over a 90-day period, the plants were monitored under an overhead irrigation system. Adjustments were made during the trial after variability in water delivery was observed, with future demonstrations set to trial alternative irrigation methods such as individual drippers.

At the conclusion of the trial, roots were assessed using an internationally recognised method to calculate the Root Growth Angle Index (RGAI), which indicates whether roots tend to grow more vertically or spread laterally. While no statistically significant differences were detected between varieties due to irrigation variability, clear trends were observed in total root numbers and distribution across different root angles.

Results from the demonstration were presented to growers and advisors in Proserpine, Te Kowai and Carmila in late 2025. These sessions prompted valuable discussion around how root growth patterns align with on-farm experiences and management practices.

Feedback to date has been supportive, with growers keen to see the work continue and to contribute their own observations. SRA is now encouraging growers to review the findings and provide feedback on variety management based on their experience, helping to shape future research and practical recommendations.

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