Dairy Australia launches US$7M project to increase milk yield

AUSTRALIA – Dairy Australia and the Tasmanian Institute of Agriculture (TIA), supported by funding from the Gardiner Foundation, have launched a five-year, US$7.03 million (A$9.87 million) research initiative titled “Closing the Clover Gap” aimed at boosting milk yield.

Commencing operations across southeastern Australia, the project investigates whether integrating higher proportions of clover into traditional perennial ryegrass pastures can increase cow milk yields and elevate farmgate profitability while curbing reliance on volatile synthetic nitrogen fertilizers and lowering enteric methane intensity.

The program builds directly upon foundational results established during the Dairy HIGH2 farmlet trial, which demonstrated that commercial dairy systems could halve synthetic nitrogen applications while sustaining high levels of dry-matter pasture biomass and fluid milk output.

Researchers are now scaling those findings by comparing clover-dense swards directly against standard ryegrass monocultures under controlled farming systems. The primary goal is to establish reliable agronomic strategies that enable commercial producers to replicate these yield and cost benefits across varied soil types and seasonal conditions.

Escalating global fertilizer price volatility and tightening environmental scrutiny have intensified producer interest in leguminous pasture species.

In intensive grazing models, heavy dependence on synthetic nitrogen exposes farm balance sheets to international chemical commodity swings, while raising regulatory exposure should authorities ever impose regional application caps to limit nitrate leaching and greenhouse gas emissions.

Beyond reducing input expenses, legumes offer a physiological pathway to break through pasture intake limits. In ryegrass-dominated dairy systems, the volume of pasture harvested and consumed directly per hectare has largely hit an operational ceiling.

Because clover features higher digestibility, faster rumen clearance rates, and balanced crude protein fractions, increasing its proportion in the herd’s grazing diet enables cows to consume more dry matter per day, lifting individual milk solids yields without necessitating herd expansion or additional concentrate feed purchases.

Field trials will center at TIA’s Dairy Research Facility in Elliott, North-West Tasmania, utilizing specialized farmlet paddocks before expanding across a regional network of commercial focus farms in Tasmania and Victoria.

Testing under commercial operating conditions ensures that practical establishment techniques, weed management, and grazing rotations can be adopted seamlessly by pasture-based operators.

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