Southern Cross University (SCU), in collaboration with the NSW Department of Primary Industries and Regional Development (DPIRD) and the Australian Macadamia Society (AMS), is leading innovative research to strengthen the sustainability and productivity of the $280 million macadamia industry.
The project focuses on optimising nutrient use efficiency, especially phosphorus (P), which is a finite resource and can damage waterways if it enters the catchment.
The work also aims to improve soil–plant symbioses, and develop strategies for long term orchard health.
Lead researchers: Dr Kwanho Jeong and Professor Terry Rose.
Expected outcomes
- Identify and clarify how macadamia trees form cluster roots under low-phosphorus conditions, and how this process assists with nutrient uptake and reduces fertiliser dependence.
- Boost phosphorus and micronutrient absorption in orchards by promoting the vital relationship between plant roots and soil fungi (arbuscular mycorrhiza symbiosis).
- New guidelines for efficient phosphorus use, supporting productivity and sustainability.
Potential impacts
Improved orchard and soil health: Providing farmers and peak bodies with best-practice strategies for fertiliser use will help improve sustainability and productivity.
Reduced fertiliser use: By understanding cluster root formation and improving nutrient uptake, growers can reduce fertiliser inputs, lowering costs and environmental impact.
Environmental benefits: More effective and efficient use of fertilisers will reduce the use of phosphorus, which can enter waterways and impact surrounding ecosystems.
This case study was produced with support from the Southern Queensland and Northern NSW Drought Resilience Adoption and Innovation Hub.