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The direct and residual effects of giving fish meal to dairy cows receiving differing levels of concentrate supplementation in addition to grass silage

Published online by Cambridge University Press:  02 September 2010

F. J. Gordon  and
J. C. Small
F. J. Gordon
Affiliation:
Agricultural Research Institute of Northern Ireland, Hillsborough, Co. Down BT26 6DR
J. C. Small
Affiliation:
Agricultural Research Institute of Northern Ireland, Hillsborough, Co. Down BT26 6DR
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Abstract

Seventy-eight British Friesian type cows, mean calving date 13 January, were used in a 3 × 2 factorial design experiment to examine the direct and residual responses to replacing 0·8 kg/day of a concentrate containing 184 g/kg crude protein with an equal quantity of fish meal when using three levels of total supplement feeding (0·8, 4·0 and 7·2 kg/day). In addition, all animals had access ad libitum to a high-quality grass silage (in vivo digestible organic matter 750 g/kg dry matter) during the treatment period. Treatments were applied from day 8 post partum until 22 April, when all animals went to pasture, giving a mean treatment period of 91 days. At pasture the animals were rotationally grazed as three groups, based on the three levels of total supplement offered during the treatment period, at the same stocking rate. The effects of treatments in terms of direct effects during the treatment periods, residual effects at pasture and also total lactation were assessed. Also during the treatment period the effects on rumen volatile fatty acid contents and blood composition were monitored. In addition, total diet digestibility and food utilization studies were carried out on six animals per treatment.

Level of supplementation significantly influenced milk output during both the treatment and full lactation periods with the total lactation responses being 2·0 and 1·0 kg milk per kg additional supplement between the food levels of 0·8 to 4·0 and 4·0 to 7·2 kg/day respectively. Level of supplementation also significantly influenced milk fat concentration during the treatment, residual and full lactation periods and milk protein concentration during the treatment period only.

The replacement of 0·8 kg conventional concentrate by 0·8 kg fish meal significantly increased milk yield during the final 21 days on treatment (mean yield per day 20·6 and 21·9 (s.e. 0·44) kg for without and with fish meal treatments respectively) but there were no significant residual or total lactation effects. From the data it was calculated that at low levels of supplementation 0·8 kg fish meal could be used to replace 1·9 kg conventional concentrate but at more moderate levels of nutrition any substitution would be much lower and uneconomic.

Keywords

energy intakemilk productionnutritionproteinsilage
Type
Research Article
Information
Animal Production , Volume 51 , Issue 3 , December 1990 , pp. 449 - 460
Copyright
Copyright © British Society of Animal Science 1990

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References

REFERENCES

Agricultural Research Council. 1984. The Nutrient Requirements of Ruminant Livestock. Commonwealth Agricultural Bureaux, Slough.Google Scholar
Banks, W. and Muir, D. D. 1982. The compositional quality of milk. Report, Hannah Research Institute, 1981, pp. 67–74.Google Scholar
Butler, T. M., Gleeson, P. A. and Morgan, D. J. 1983. Effect of supplement feeding level and crude protein content of the supplement on the performance of spring-calving cows. Irish Journal of Agricultural Research 22: 69–78.Google Scholar
Gleeson, P. A. 1970. Feeding dairy concentrates to maximum advantage under Irish conditions. In Dairy Nutrition, Technical Publication, U.S. Feed Grains Council, pp. 85–95. London.Google Scholar
Gleeson, P. A. 1973. Pre- and post-calving feeding of dairy cattle. Irish Grassland and Animal Production Association Journal 8: 68.Google Scholar
Gordon, F. J. 1981. Feed input — milk output relationships in the spring-calving dairy cow. In Recent Advances in Animal Nutrition — 1980 (ed. Haresign, W.), pp. 15–32. Butterworths, London.CrossRefGoogle 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 autumncalving dairy cows. Journal of Agricultural Science, Cambridge 102: 163–179.CrossRefGoogle Scholar
Gordon, F. J. and McMurray, C. H. 1979. The optimum level of protein in the supplement for dairy cows with access to grass silage. Animal Production 29: 283–291.Google Scholar
Gordon, F. J. and Peoples, A. C. 1986. The utilization of wilted and unwilted silages by lactating cows and the influence of changes in the protein and energy concentration of the supplement offered. Animal Production 43: 355–366.Google Scholar
Gordon, F. J., Unsworth, E. F. and Peoples, A. C. 1981. Protein supplementation of silage-based diets for milk production. 54th Annual Report, Agricultural Research Institute of Northern Ireland, pp. 13–23.Google Scholar
Le du, Y. L. P. and Penning, P. D. 1982. Animal based techniques for estimating herbage intake. In Herbage Intake Handbook (ed. Leaver, J. D.), pp. 37–75. British Grassland Society.Google Scholar
McDonald, P. and Edwards, R. A. 1976. The influence of conservation methods on digestion and utilization of forages by ruminants. Proceedings of the Nutrition Society 35: 201–211.CrossRefGoogle ScholarPubMed
Mayne, C. S. and Gordon, F. J. 1984. The effect of type of concentrate and level of concentrate feeding on milk production. Animal Production 39: 65–76.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
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 lactation. British Journal of Nutrition 45: 547–555.CrossRefGoogle ScholarPubMed
Peoples, A. C. and Gordon, F. J. 1989. The influence of wilting and season of silage harvest and the fat and protein concentration of the supplement on milk production and food utilization by lactating cattle. Animal Production 48: 305–317.Google Scholar
Rooke, J. A., Brett, P. A., Overend, M. A. and Armstrong, D. G. 1985. The energetic efficiency of rumen microbial protein synthesis in cattle given silage-based diets. Animal Feed Science and Technology 13: 255–267.CrossRefGoogle Scholar
Small, J. C. 1986. An evaluation through dairy cattle of systems of harvesting grass for silage and the response in milk production to source of supplementary protein. Ph.D. Thesis, The Queen's University of Belfast.Google Scholar
Small, J. C. and Gordon, F. J. 1990. A comparison of the responses by lactating cows given grass silage to changes in the degradability or quantity of protein offered in the supplement. Animal Production 50: 391–398.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. Animal Production 30: 39–51.Google Scholar