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Nutrient supply to high-yielding dairy cows

Published online by Cambridge University Press:  27 February 2018

D E Beever ,
A Hattan ,
C.K. Reynolds  and
S B Cammell
D E Beever
Affiliation:
Centre for Dairy Research, (CEDAR), Department of Agriculture, The University of Reading, Earley Gate, Reading RG6 6AT
A Hattan
Affiliation:
Centre for Dairy Research, (CEDAR), Department of Agriculture, The University of Reading, Earley Gate, Reading RG6 6AT
C.K. Reynolds
Affiliation:
Centre for Dairy Research, (CEDAR), Department of Agriculture, The University of Reading, Earley Gate, Reading RG6 6AT
S B Cammell
Affiliation:
Centre for Dairy Research, (CEDAR), Department of Agriculture, The University of Reading, Earley Gate, Reading RG6 6AT
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Abstract

The last decade of the 20th century has seen unprecedented change within the UK dairy industry, with consolidated of production quotas, payment schemes based on milk solids, deregulation of the milk market with the demise of the Milk Marketing Board and more recently a major downward pressure on milk prices. All of these have contributed to further intensification of a large part of the industry. However the largest change has been the introduction of improved genetics, with the accompanying increase in Holsteins (now the preferred breed) at the expense of Friesians. As a consequence individual cow yields have increased dramatically and such cows are becoming an increasing problem in respect of nutritional management, as it relates to optimisation of milk solids content and yield and maintenance of reproductive competence. This paper has attempted to examine some of these issues by first describing the changes in more detail and then from a theoretical consideration of the biochemical principles associated with milk solids production to provide information which may permit better decisions to be made in relation to the feeding of such cows. In this respect the importance of glucose is established as well as the potentially competing processes of energy use for body maintenance or milk fat synthesis. Two experimental studies from this laboratory with high genetic merit cows are used to illustrate how the overall utilisation of energy for lactation and body tissue metabolism may be affected, especially when energy intake in early lactation fails to meet whole body energy demands. Subsequently, the nutrient costs of pregnancy, an important but often forgotten part of the ‘annual’ life cycle of dairy cows, are also considered and it is concluded that increased emphasis needs to be put on the management of cows for lifetime performance rather than simply for lactational output. Finally, whilst recognising that high yielding cows represent a major challenge to all management systems, the paper concludes that existing feeding systems which rely solely on nutritional entities such as metabolisable energy will need to be abandoned in favour of those which recognise specific nutrients, if the full potential of high genetic merit cows is ever to be achieved

Type
Invited Papers
Information
BSAP Occasional Publication , Volume 26 , Issue 1: Fertility in the High Producing Dairy Cow , January 2001 , pp. 119 - 131
Copyright
Copyright © British Society of Animal Science 2001

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References

Agricultural and Food Research Council, (1993). Energy and protein requirements of ruminants. An advisory manual prepared by the AFRC Technical Committee on Responses to Nutrients. CAB International, Wallingford, UK.Google Scholar
Backwell, F R C, Bequette, B R, Wilson, D, Metcalf, J A, Franklin, M F, Beever, D E, Lobley, G E, and MacRae, J C, (1996). Evidence for the utilisation of peptides for milk protein synthesis in the lactating dairy goat in vivo. American Journal of Physiology-Regulatory Integrative and Comparative Physiology, 40, R955-60.CrossRefGoogle Scholar
Baldwin, R L, Thornley, J H M and Beever, D E, (1987). Modelling the metabolism of the lactating dairy cow. 2. Digestive elements of a mechanistic model. Journal Dairy Research, 54, 107-31.Google Scholar
Beever, D E, (1993). Rumen function. In ‘Quantitative aspects of Ruminant Digestion and Metabolism’, (eds, Forbes, J M and France, J), 5,187–215. CAB International, Wallingford, UK.Google Scholar
Beever, D E, Cammell, S B, Sutton, J D, Rowe, N and Perrott, G E, (1998). Energy metabolism in high yielding cows Proceedings British Society Animal Science, 1998, p 13.Google Scholar
Bell, A W, (1995). Regulation of organic nutrient metabolism during transition from late pregnancy to early lactation. Journal Animal Science, 73,2804-19.Google Scholar
Bickerstaffe, R, Annison, E F and Linzell, J L, (1974). The metabolism of glucose, acetate, lipids and amino acids in lactating dairy cows. Journal Agricultural Science (Comb), 82, 71–85.Google Scholar
Cammell, S B, Beever, D E, Sutton, J D, France, J, Alderman, G and Humphries, D J, (2000). The energy partition of lactating dairy cows receiving a total mixed ration based on maize silage. Animal Science (in press).Google Scholar
Crompton, L A, Reynolds, C K, Bequette, B R, Maas, J A, France, J, Beever, D E and MacRae, J C, (1999). Effect of essential amino acid infusion on phenylalanine metabolism in the mammary gland of lactating dairy cows. In ‘Protein Metabolism and Nutrition’ p78. (eds, Lobley, G E, White, A and MacRae, J C). Wageningen Press, Wageningen, The Netherlands.Google Scholar
Davis, A.J, Fleet, I.R, Goode, J A, Hamon, M H, Maule Walker, F M and Peaker, M, (1979). Changes in mammary function at the onset of lactation in the goat: correlation with hormonal changes. Journal Physiology, 288, 33 Google Scholar
Gibb, M J, Ivings, W E, Dhanoa, M S and Sutton, J D, (1992). Changes in body components of autumn-calving Holstein-Friesian cows over the first 29 weeks of lactation. Animal Production, 55, 339–360.Google Scholar
Lindsay, D B, (1970). Carbohydrate metabolism in the ruminant. In ‘Physiology of Digestion and Metabolism in the Ruminant’ (ed, Phillipson, A T). pp438-51.Google Scholar
MacRae, J C, Buttery, P J and Beever, D E, (1988). Nutrient interactions in the dairy cow. In ‘Nutrition and lactation in the dairy cow’ (ed, Garnsworthy, P C) pp 55–75. Butterworths, London.Google Scholar
Mansbridge, R J and Blake, J S, (1997). Nutritional factors affecting the fatty acid composition of bovine milk. British Journal of Nutrition, 78, suppl 1, s37–47.Google ScholarPubMed
Metcalf, J A, Beever, D E, Sutton, J D, Wray-Cahen, D, Evans, R T and Humphries, D J, (1994). The effect of supplementary protein on in vivo metabolism of the mammary gland in lactating dairy cows. Journal Dairy Science, 77,1816-27.Google Scholar
Metcalf, J A, Wray-Cahen, D, Chettle, E E, Sutton, J D, Beever, D E, Crompton, L A, MacRae, J C, Bequette, B R and Backwell, F R C, (1996). The effect of increasing levels of dietary crude protein as protected soya on mammary metabolism in the lactating dairy cow. Journal Dairy Science, 69,603-11.Google Scholar
Mills, J A N, France, J and Dijkstra, J, (1999). A review of starch digestion in the lactating dairy cow and proposals for a mechanistic model: 1. Dietary starch characteristics and ruminal starch digestion. Journal Animal and Feed Sciences, 8,291–340.Google Scholar
Moe, P W and Tyrrell, H F, (1972). Metabolisable energy requirements of pregnant dairy cows. Journal Dairy Science, 55,480-3.Google Scholar
Moore, J H and Christie, W W, (1979). Lipid metabolism in the mammary gland of ruminants. Progress in Lipid Research, 17,347-95.Google Scholar
Reynolds, C K and Beever, D E, (1995). Energy requirements and responses: a United Kingdom perspective. In’ Breeding andFeeding the High Genetic Merit Dairy Cow ‘.(eds, Lawrence, T L J, Gordon, F J and Carson, A). BSAS Occasional publication no 19. pp 31–41.Google Scholar
Reynolds, C K, Humphries, D J, Cammell, S B, Benson, J, Sutton, J D and Beever, D E, (1998). Effects of abomasal wheat sratch infusion on splanchnic metabolism and energy balance of lactating dairy cows. In ‘Energy Metabolism offarm animals’ (eds, McCracken, K, Unsworth, E F and Wylie, A R G) pp39–42. EAAP Symposium on Energy Metabolism. CAB International, Wallingford, UK.Google Scholar
Sheehan, M, (1999). Short, medium and long term strategies for increasing profit from milk. Paper to Society of Feed Technologists, June 1999.Google Scholar
Stangassinger, M and Giesecke, D, (1984). Splanchnic metabolism of glucose and related energy substrates. In ‘ Control ofDigestion and Metabolism in Ruminants’ (eds. Milligan, L P, Grovum, W L and Dobson, A). pp 347–366. Prentice Hall, Englewood Cliffs, New Jersey.Google Scholar
Sutton, J D, Broster, W H, Napper, D J and Siviter, J W, (1985). Feeding frequency for lactating dairy cows: effects on digestion, milk production and energy utilisation. British Journal of Nutrition, 53, 117-30.Google Scholar
Sutton, J D, Cammell, S B, Beever, D E, Haines, M J, Spooner, M C and Harland, J I. (1991). The effect of energy and protein sources on energy and nitrogen balances in Friesian cows in early lactation. In ’Energy metabolism of farm animals (eds.Wenk, C and Boessinger, M). Proceedings 12th European Association of Animal Production symposium. EAAP Publication No 58, ETH Zentrum, Zurich, Switzerlandpp 288-91.Google Scholar
Yan, T, Gordon, F J, Agnew, R E, Porter, M G and Patterson, D C, (1997). The metabolisable energy requirement for maintenance and the efficiency of utilisation of metabolisable energy for lactation by dairy cows offered grass silage based diets. Livestock Production Science, 51, 141-50.Google Scholar