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That’s the advice from ruminant nutritionist Dr Alan Reeve from C&H Nutrition, who says that milk butterfat percentage falls by around 0.3 percentage points on average after turnout, but the drop can even more significant on some farms. “If you are paid a premium for butterfat, it’s important that you counter this traditional seasonal dip by fine-tuning the lactating ration,” he says. Dr Reeve recommends improving the fat profile of the ration. “Butterfat uplifts of around 0.3-0.4% have been consistently reported when a high C16 fat such as Energizer-RP10 is fed at 400g/head/day. Producers can also typically expect an extra litre of milk,” he says. Dr Reeve points out that once cows move onto lush green grass, the long fibre content of the ration drops. At the same time, the high sugar content of freshly grazed spring grass makes the rumen more acidic and both these factors combine to reduce milk butterfat level. “Failure to maintain optimum rumen pH in cows at grass is a major drag on performance,” he points out. “The rumen works at optimum efficiency when the pH level remains steady over time in the range 6.0-6.5. Any variation in this range will reduce the activity of the rumen bacteria, particularly those responsible for fibre breakdown and butterfat production will be adversely affected.” He suggests producers talk to their nutritional adviser about the buffering capacity of the whole ration and to consider supplementing early summer grazing diets with an effective rumen buffer, such as Alkakarb, if required. - ends - Note to Editors: C&H Nutrition is a FEMAS-approved feed trade-marketing partner representing the agricultural interests of  HYPERLINK "http://www.chance-hunt.co.uk" \t "_blank" Chance and Hunt Limited – a subsidiary of the  HYPERLINK "http://www.azelis.com" \t "_blank" Azelis Group, a pan-European speciality chemicals business. C&H Nutrition supplies a range of products to the agricultural and animal feed industry. Representing both UK and international manufacturers, its developing product range includes major mineral sources for animal feeds, speciality nutritional feed additives, processing and preservation aids for on-farm feeds and forages, and hygiene products. April 30, 2008 Further information from: Dr Alan Reeve C&H Nutrition Tel: 01928 793090 Issued by David Butler, ABC Ltd Tel: 01694 731777 $%щ  „ … Л М г д ы ь   ( ) GљёшшкЯРЯРГРЯРЯРГРЯ0JCJOJQJ^JaJjCJOJQJU^JaJCJOJQJ^JaJ5>*CJOJQJ^JaJCJOJQJ^J5OJQJ^J OJQJ^J$%щъийpq~Žѕ љ    Г Д У Ф ь ў §§єяъсссссссссъъъййъ§ъ§§§$dha$$„T`„Ta$$a$d№$ Ц„a$G§ў 5G§јјј$a$,1hА‚. 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