NESP TWQ Project 5.11 - Improved water quality outcomes from on-farm nitrogen management, 2019-2020 (UQ)

Research Project

Researchers: Anthony Webster (collaborator) ,  Australian Institute of Marine Science (Associated with) ,  Australian Institute of Marine Science (AIMS) (Associated with) ,  Damien Burrows (collaborator) ,  Dowie, Jayson (collaborator)
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Full description The sugar industry occupies 350,000ha in Reef catchments, applies >55,000t of nitrogen (N) fertilizer annually and is a major contributor of dissolved inorganic nitrogen (DIN) to Great Barrier Reef receiving waters. There are many potential mechanisms for reducing on-farm Nusage. However, the comprehensive review of N use in sugarcane (SRA/DoE 2014) identified widespread over-use of N fertilizer and recommended adopting production zone yield potential (PZYP) combined with enhanced efficiency fertilizers (EEFs) to reduce ’surplus N’ (where applied N>crop requirements). This project utilized existing farm trials at identified N loss ‘hot spots’ to test PZYP as the basis for determining fertilizer N rates and for comparing EEFs with standard N fertilizers for minimizing N losses. Water quality benefits that derive from such practice changes were evaluated. Productivity, economic and environmental indicators validated these strategies for reducing surplus N and produced recommendations for enhanced Best Management Practices.

Notes Credit
This project was funded by the Australian Government's Department of Agriculture, Water and the Environment through the National Environmental Science Programme Tropical Water Quality (NESP TWQ) hub with co-investment from project partners and collaborators.

Data time period: 2019-01-01 to 10 12 2020

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