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Systems of concentrate allocation for dairy cattle 1. A comparison of three patterns of allocation for autumn-calving cows and heifers offered grass silage ad libitum

Published online by Cambridge University Press:  02 September 2010

W. Taylor  and
J. D. Leaver
W. Taylor
Affiliation:
West of Scotland Agricultural College, Crichton Royal Farm, Dumfries DG1 4SZ
J. D. Leaver
Affiliation:
West of Scotland Agricultural College, Crichton Royal Farm, Dumfries DG1 4SZ
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Abstract

High quality grass silage (10·5 MJ metabolizable energy per kg dry matter (DM)) was offered ad libitum to three groups of autumn-calving dairy cattle, each group containing eight cows and eight heifers. In a 20-week period commencing at week 3 post partum each group received, on average, 1260 kg fresh weight of a concentrate containing 180 g crude protein per kg. Animals in treatment F each received a flat-rate of 9 kg concentrates per day throughout. In treatment D, a declining rate of 11, 10, 9, 8 and 7 kg/day was given in successive 4-week periods. Animals in treatment Y were each offered a fixed rate of concentrates (range 7 to 12 kg/day) based on their milk yield at 2 weeks post partum with a mean intake of 9 kg/day for the group. For treatments F, D and Y respectively, the mean daily milk yields were, 26·2, 26·7 and 26·9 kg for cows, and 19·5, 19·1 and 18·8 kg for heifers; mean live-weight gains were, 0·28, 0·30 and 0·22 kg/day for cows, and 0·41, 0·54 and 0·38 kg/day for heifers; and intakes of silage were, 10·1, 10·6 and 10·7 kg DM per day for cows, and 7·8, 7·7 and 7·3 kg DM per day for heifers. The differences between treatments were not significant but there were significant differences between cows and heifers. No significant differences were found between treatments in milk composition although heifers produced milk with significantly higher milk protein concentration (P < 0·05) and significantly greater milk lactose concentration (P < 0·01) than did cows. During the residual period (4 weeks indoors and 16 weeks grazing) all animals were treated as a single group and there were no significant differences in performance. The 305-day milk yields were not significantly different between treatments and averaged 6587 kg for cows, and 5124 kg for heifers.

Type
Research Article
Information
Animal Production , Volume 39 , Issue 3 , December 1984 , pp. 315 - 324
Copyright
Copyright © British Society of Animal Science 1984

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References

REFERENCES

Agricultural Research Council. 1980. The Nutrient Requirements of Ruminant Livestock. Commonwealth Agricultural Bureaux, Slough.Google Scholar
Baker, Anne-Marie C. 1980. A study of herbage production and its utilization by dairy cattle from continuously grazed swards. M. Sc. Thesis, Fac. Sci., Univ. Glasgow.Google Scholar
Blaxter, K. L. 1956. Starch equivalents, ration standards and milk production. Proc. Br. Soc. Anim. Prod., pp. 1–31.Google Scholar
Broster, W. H. 1976. Plane of nutrition for the dairy cow. In Principles of Cattle Production (ed. Swan, H. and Broster, W. H.), pp. 271–285. Butterworth, London.Google Scholar
Broster, W. H., Broster, Valerie J. and Smith, T. 1969. Experiments on the nutrition of the dairy heifer. VIII. Effect on milk production of level of feeding at two stages of the lactation. J. agric. Sci., Camb. 72: 229–245.CrossRefGoogle Scholar
Broster, W. H.Broster, Valerie J., Smith, T. and Siviter, J. W. 1975. Experiments on the nutrition of the dairy heifer. IX. Food utilization in lactation. J. agric. Sci. Camb. 84: 173–186.CrossRefGoogle Scholar
Broster, W. H., Clements, June A., Hill, R. E., Smith, T., Siviter, J. W. and Broster, Valerie J. 1983. Methods of feed distribution to dairy cows. Report 1982, National Institute for Research in Dairying, p. 32.Google Scholar
Broster, W. H. and Strickland, M. J. 1977. Feeding the dairy cow in early lactation. ADAS Q. Rev. 26: 87–105.Google Scholar
Gleeson, P. A. 1970. Feeding dairy concentrates to maximum advantage under Irish conditions. In Dairy Nutrition, pp. 85–95. US Feeds Grains Council.Google Scholar
Gordon, F. J. 1982a. The effect of pattern of concentrate allocation on milk production from autumn-calving heifers. Anim. Prod. 34: 55–61.Google Scholar
Gordon, F. J. 1982b. The effects of degree of chopping grass for silage and method of concentrate allocation on the performance of dairy cows. Grass Forage Sci. 37: 59–65.CrossRefGoogle Scholar
Johnson, C. L. 1977. The effect of the plane and pattern of concentrate feeding on milk yield and composition in dairy cows. J. agric. Sci., Camb. 88: 79–94.CrossRefGoogle Scholar
Johnson, C. L. 1979. The effect of level and frequency of concentrate feeding on the performance of dairy cows of different yield potential. J. agric. Sci., Camb. 92: 743–751.CrossRefGoogle Scholar
Johnson, C. L. 1983. Influence of feeding pattern on the biological efficiency of high-yielding dairy cows. J. agric. Sci., Camb. 100: 191–199.CrossRefGoogle Scholar
Laird, R., Leaver, J. D., Moisey, F. R. and Castle, M. E. 1981. The effects of concentrate supplements on the performance of dairy cows offered grass silage ad libitum. Anim. Prod. 33: 199–209.Google Scholar
Ministry of Agriculture, Fisheries and Food. 1981. Flat or stepped feeding of complete diets for first lactation cows. Research and Development Reports Agriculture Service. Dairy Cows. Paper no. EC05909. MAFF, Alnwick.Google Scholar
Ministry of Agriculture, Fisheries and Food, Department of Agriculture and Fisheries for Scotland and Department of Agriculture for Northern Ireland. 1975. Energy allowances and feeding systems for ruminants. Tech. Bull. 33. Her Majesty's Stationery Office, London.Google Scholar
Moisey, F. R. and Leaver, J. D. 1982. The effect of level and system of concentrate allocation on the performance of cows offered grass silage ad libitum. Anim. Prod. 34: 399 (Abstr.)Google Scholar
Østergaard, V. 1979. Strategies for concentrate feeding to attain the optimum feeding level in high yielding dairy cows. Beretn. St. Husdyrbrugs Fors., 482.Google Scholar
Steen, R. W. J. and Gordon, F. J. 1980. The effect of level and system of concentrate allocation to January/February calving cows on total lactation performance. Anim. Prod. 30: 39–51.Google Scholar
Taylor, W. 1983. Pattern of concentrate allocation for dairy cows offered silage ad libitum. Ph. D. Thesis, Fac. Sci., Univ. Glasgow.Google Scholar