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Milk production in early lactation dairy cows given grass silage ad libitum: Influence of concentrate energy source, crude protein content and level of concentrate allowance

Published online by Cambridge University Press:  02 September 2010

B. K. Sloan ,
P. Rowlinson  and
D. G. Armstrong
B. K. Sloan
Affiliation:
Department of Agriculture, The University, Newcastle Upon Tyne NE1 7RU
P. Rowlinson
Affiliation:
Department of Agriculture, The University, Newcastle Upon Tyne NE1 7RU
D. G. Armstrong
Affiliation:
Department of Agricultural Biochemistry and Nutrition, The University, Newcastle Upon Tyne NE1 7RU
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Abstract

There is increasing interest in how the raw material make-up of concentrates can influence the milk performance of dairy cows. Thus, over two consecutive winters, 54 dairy cows were used to investigate the effects on dry matter (DM) intake, milk yield and its composition of feeding concentrates of diverse energy source (LNDF — 131 g neutral-detergent fibre per kg DM, 492 g starch plus sugars per kg DM; HNDF — 244 g neutral-detergent fibre per kg DM, 293 g starch plus sugar per kg DM) at two formulated crude protein (CP) levels (157 v. 187 g/kg DM) and three levels of concentrate allowance (9, 11, 13 kg DM). The concentrates were formulated to be of equivalent metabolizable energy concentration (MJ/kg DM) and were offered with silage ad libitum for a 10-week period (weeks 4 to 13 of lactation).

Silage intakes were variable but not significantly influenced by concentrate energy source or formulated CP level, except in the 1st year where animals consuming the high CP concentrate ate more silage. Silage DM intake decreased as concentrate allowance was increased with the substitution rate (kg silage DM per kg concentrate DM) increasing as concentrate allowance was increased.

Increasing the concentrate allowance effected the expected increases in milk yield. Concentrate energy source did not influence milk yield but the higher CP levels effected a 2-kg increase in milk yield. Feeding of LNDF concentrates depressed milk fat concentration and its yield, the depression being accentuated with each increase in concentrate allowance. The depression in milk fat concentration was negatively correlated with the forage: concentrate ratio of the diet consumed. Furthermore, dietary NDF proportion was shown to account for greater than half of the variation in milk fat concentration. In contrast to the observations made for milk fat, feeding the LNDF concentrates effected an increase in milk protein concentration but only at the lower CP level of the concentrate.

Type
Research Article
Information
Animal Production , Volume 46 , Issue 3 , June 1988 , pp. 317 - 331
Copyright
Copyright © British Society of Animal Science 1988

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References

REFERENCES

Agricultural Development and Advisory Service. 1986. Condition scoring of dairy cows. Pamphlet 612. Ministry of Agriculture, Fisheries and Food, Pinner.Google Scholar
Agricultural Research Council. 1980. The Nutrient Requirements of Ruminant Livestock. Commonwealth Agricultural Bureaux, Slough.Google Scholar
Agricultural Research Council. 1984. The Nutrient Requirements of Ruminant Livestock. Supplement No. 1. Commonwealth Agricultural Bureaux, Slough.Google Scholar
Anonymous. 1987. Composition of compound feed rations. Feed Compounder 7: (5), 36.Google Scholar
Armstrong, D. G. 1982. Dietary protein and the high-yielding dairy cow. 12th Hannah Lecture. Report, Hannah Research Institute, pp. 65–74.Google Scholar
Bhattacharya, A. N. and Lubbadah, W. F. 1971. Feeding high levels of beet pulp in high concentrate dairy rations. Journal of Dairy Science 54: 95–99.CrossRefGoogle Scholar
Bhattacharya, A. N. and Sleiman, F. T. 1971. Beet pulp as a grain replacement for dairy cows and sheep. Journal of Dairy Science 54: 89–94.CrossRefGoogle Scholar
Broster, W. H., Sutton, J. D. and Bines, J. A. 1979. Concentrate: forage ratios for high yielding dairy cows. In Recent Advances in Animal Nutrition — 1978 (ed. Haresign, W. and Lewis, D.), pp 99–126. Butterworths, London.CrossRefGoogle Scholar
Broster, W. H., Sutton, J. D., Bines, J. A., Broster, V. J., Smith, T., Siviter, J. W., Johnson, V. W., Napper, D. J. and Schuller, E. 1985. The influence of plane of nutrition and diet composition on the performance of dairy cows. Journal of Agricultural Science, Cambridge 104: 535–557.CrossRefGoogle Scholar
Castle, M. E., Gill, M. S. and Watson, J. N. 1981. Silage and milk production: a comparison between barley and dried sugar-beet pulp as silage supplements. Grass and Forage Science 36: 319–324.CrossRefGoogle Scholar
Cressman, S. G., Grieve, D. G., MacLeod, G. K., Wheeler, E. E. and Young, L. G. 1980. Influence of dietary protein concentration on milk production by dairy cattle in early lactation. Journal of Dairy Science 63: 1839–1847.CrossRefGoogle Scholar
Erfle, J. D., Mahadevan, D., Teather, R. M. and Sauer, F. D. 1983. The performance of lactating cows fed urea-treated corn silage in combination with soyabean meal or fishmeal containing concentrates. Canadian Journal of Animal Science 63: 191–199.CrossRefGoogle Scholar
Gibson, J. P. 1984. The effects of frequency of feeding on milk production of dairy cattle: an analysis of published results. Animal Production 38: 181–189.Google Scholar
Gordon, F. J. 1984. The effect of level of concentrate supplementation given with grass silage during the winter on the total lactation performance of autumn-calving dairy cows. Journal of Agricultural Science, Cambridge 102: 163–179.CrossRefGoogle Scholar
Goulden, C. H. 1952. Methods of Statistical Analysis. 2nd ed. Wiley, New York.Google Scholar
Ha, J. K. and Kennelly, J. J. 1984. Effects of fishmeal and formaldehyde or blood treatment of canola meal on digestion and milk production. Agriculture and Forestry Bulletin Special Issue, pp. 56–77.Google Scholar
Lees, J. A., Garnsworthy, P. C. and Oldham, J. D. 1982. The response of dairy cows in early lactation to supplements of protein given with rations designed to promote different patterns of rumen fermentation. In Forage Protein in Ruminant Animal Production (ed. Thomson, D. J., Beever, D. E. and Gunn, R. G.), Occasional Symposium, British Society of Animal Production, No. 6, pp. 157–159.Google Scholar
Mayne, C. S. and Gordon, F. J. 1985. The effect of concentrate-to-forage ratio on the milk-yield response to supplementary protein. Animal Production 41: 269–279.Google Scholar
Miller, E. L., Galwey, N. W., Newman, G. and Pike, I. H. 1982. Report of co-ordinated trials carried out on commercial farms in the UK. In Protein Contribution of Feedstuffs for Ruminants: Application to Feed Formulation (ed. Miller, E. L., Pike, I. H. and Es, A. J. H. Van), pp. 131–141. Butterworths, London.CrossRefGoogle Scholar
Ministry of Agriculture, Fisheries and Food. 1979. Nutrient allowances and composition of feedingstuffs for ruminants. Publication, Agricultural Development and Advisory Service, LGR 21.Google Scholar
Ministry of Agriculture, Fisheries and Food. 1986. Feed Composition. UK Tables of Feed Composition and Nutritive Value for Ruminants.Google Scholar
Nie, N. H., Hull, C. H., Jenkins, J. G., Steinbrenner, K. and Bent, D. H. 1975. SPSS: Statistical Package for the Social Sciences. 2nd ed. McGraw-Hill, New York.Google Scholar
Oldham, J. D. and Sutton, J. D. 1979. Milk composition and the high yielding cow. In Feeding Strategy for the High Yielding Dairy Cow (ed. Broster, W. H. and Swan, H.), pp. 114–147. Granada, St Albans.Google Scholar
Ørskov, E. R., Reid, G. W. and McDonald, I. 1981. The effects of protein degradability and food intake on milk yield and composition in cows in early lacation. British Journal of Nutrition 45: 547–555.CrossRefGoogle Scholar
Østergaard, V. 1979. Optimum feeding strategy during lactation. In Feeding Strategy for the High Yielding Dairy Cow (ed. Broster, W. H. and Swan, H.), pp. 171–194. Granada, St Albans.Google Scholar
Pabst, K. Von, Schulte-Coerne, H., Hackstedt, C. and Langner, R. 1986. [Feeding experiments with soya and fishmeal to dairy cows.] Milchwissenschaft 41: 23–26.Google Scholar
Roffler, R. E., Satter, L. D., Hardie, A. R. and Tyler, W. J. 1978. Influence of dietary protein concentration on milk production by dairy cattle during early lactation. Journal of Dairy Science 61: 1422–1428.CrossRefGoogle ScholarPubMed
Sloan, B. K. 1986. The influence of concentrate protein and energy source on performance of the dairy cow. Ph.D. Thesis, University of Newcastle upon Tyne.CrossRefGoogle Scholar
Sloan, B. K., Rowlinson, P. and Armstrong, D. G. 1987. A note on concentrate energy source for dairy cows in mid lactation. Animal Production 45: 321–323.Google Scholar
Sloan, B. K., Rowlinson, P. and Armstrong, D. G. 1988. The influence of a formulated excess of rumen-degradable protein or undegradable protein on milk production in dairy cows in early lactation. Animal Production 46: 13–22.Google Scholar
Steg, A., Van Der Honing, H. and De Visser, H. 1985. Effect of fibre in compound feeds on the performance of ruminants. In Recent Advances in Animal Nutrition — 1985 (ed. Haresign, W. and Cole, D. J. A.), pp. 113–117. Butterworths, London.CrossRefGoogle Scholar
Sutton, J. D., Bines, J. A. and Napper, D. J. 1985. Comparison of starchy and fibrous concentrates for lactating dairy cows. Animal Production 40: 533 (Abstr.).Google Scholar
Sutton, J. D., Bines, J. A., Napper, D. J., Willis, J. M. and Schuller, E. 1984. Ways of improving the efficiency of milk production and of altering milk composition by manipulating concentrate feeding. Report, National Institute for Research in Dairying, 1983, pp. 74–75.Google Scholar
Taylor, W. and Leaver, J. D. 1984. Systems of concentrate allocation for dairy cattle. 2. A comparison of two patterns of allocation for autumn-calving cows offered two qualities of grass silage ad libitum. Animal Production 39: 325–333.Google Scholar
Thomas, C. 1980. Conserved forages. In Feeding Strategies for Dairy Cows (ed. Broster, W. H., Johnson, C. L. and Taylor, J. C.), pp. 8.1–8.14. Agricultural Research Council, London.Google Scholar
Thomas, C., Aston, K., Daley, S. R. and Bass, J. 1986. Milk production from silage. 4. The effect of the composition of the supplement. Animal Production 42: 315–325.Google Scholar
Varga, G. A. and Hoover, W. H. 1983. Rate and extent of neutral detergent fiber degradation of feedstuffs in situ. Journal of Dairy Science 64: 2109–2115.CrossRefGoogle Scholar