Duration Team and Leader  Dr D.C. Patterson and Steven Morrison Organisations involved ARINI, Hillsborough Background and Summary It is often assumed that grazed grass is the cheapest forage available in Northern Ireland. However, recent costings suggest that grazed grass may not be as competitive as other forages, primarily as a result of poor pasture utilisation under grazing. The Northern Ireland dairy sector is a grass based production system but two key principles have been highlighted which need to be considered in developing grass-based systems.  If the grazing...

Duration Team and Leader FJ Gordon, CS Mayne, and DC Patterson Organisations involved Agricultural Research Institute of Northern Ireland Background and Summary In view of the benefits of increasing yield per cow on improved feed efficiency and reduced fixed costs per litre of milk there is continued interest in increasing the genetic merit of the National dairy herd. Recent research at Hillsborough has however demonstrated that higher milk outputs (even with higher genetic merit animals) can only be sustained by increasing feed nutrient intake.  Achieving this objective is...

Duration  Team and Leader  A.Carson (ARINI) Organisations Involved Agricultural Research Institute of Northern Ireland (A Carson, F J Gordon, A R G Wylie) Veterinary Sciences Division, DANI (J.E. McEvoy), 11 Northern Ireland milk producers Background and Summary Feeding and management during the heifer rearing period has a major impact on subsequent animal performance, health and welfare. The systems for rearing dairy herd replacements presently adopted were developed from research carried out 30 years ago. Since then the genetic merit of the Northern Ireland diary herd has...

Duration 2 - 3 years Team and Leader  Drs H. Wicks, R. Fallon, L. Dawson, A. Carson, C.S. Mayne and A. Wylie Organisations Involved ARINI, Hillsborough; Newforge; Teagasc, Grange R.O.I. Background and Summary Current recommendations in the UK and Ireland suggest that restricted feeding of calves (up to 8 weeks of age) of a milk replacer containing 20 to 23% crude protein is adequate to meet the calf?s protein requirements. The daily allowance of milk replacer of 450 ? 750 g DM/d (at 12.5% DM concentration) fed in association with an ad libitum concentrate based feed is...

Duration 2.5 years, commencing February 2006 Team and Leader C. Ferris, N.O’Connell, D.Patterson, (ARINI, Hillsborough), M. McCoy (Veterinary Science Division) Organisations involved ARINI, VSD Background and Summary The higher nutrient requirements of high genetic merit dairy cows have been clearly established in a number of recent studies.  Meeting these higher nutrient requirements involves either increasing the nutrient density of the diet, and/or increasing total dry matter intake.  Many studies have examined ‘nutritional strategies’ by which feed intake can be...