The profitability of dairying in south-eastern Australia can be improved by increasing pasture production during summer–autumn, when growth rates for the existing perennial ryegrass (Lolium perenne L.) feedbase are low. A study undertaken in cool-temperate north-west Tasmania examined the effect of stubble height and irrigation management on swards of perennial ryegrass, continental (summer-active) tall fescue (Festuca arundinacea Schreb.) and chicory (Cichorium intybus L.). Irrigation treatments included full irrigation (∼20 mm applied at every 20 mm precipitation deficit), deficit irrigation (∼20 mm applied at alternate full-irrigation events) and rainfed (no irrigation).
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Vol. 70 • No. 2