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Supplementary feeding of dairy cows on continuously stocked pasture

Published online by Cambridge University Press:  27 March 2009

P. G. Jennings  and
W. Holmes
P. G. Jennings
Affiliation:
Wye College, University of London
W. Holmes
Affiliation:
Wye College, University of London
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Summary

Two experiments were conducted with milking cows on continuously stocked perennial ryegrass pastures. In each a control group, T0, received 1 kg/day of a concentrate supplement and treatment groups T1 and T2 received 4 kg (Expt 1) or 5 kg/day (Expt 2) of a low quality T1 or a high quality T2 concentrate. In Expt 1 treatments were applied continuously for 14 weeks to a total of 30 cows. In Expt 2 a Latin square design for 9 weeks was conducted with 18 cows. The stocking rate of the pasture declined from 9·6 to 5·1 cows per ha (mean 6·7 cows/ha) from May to August (Expt 1) and was maintained at 3 cows/ha in August-October (Expt 2).

Supplements increased total intakes by 0·92 and 0·77 kg organic matter (OM)/kg OM supplied in the concentrates respectively for Expts 1 and 2. Milk yields increased by 0·6 and 0·5 kg/kg concentrate supplied and supplemented cows showed small increases in live weight. Differences in lactation milk yield just approached significance. Grazing times were only slightly reduced by supplements and bite sizes were lower than normal. There was no important difference in animal performance between the two concentrates. The total output from the pasture was 19·6t milk and 115 GJ of utilized metabolizable energy per hectare.

Reasons for the high supplementary effect of the concentrates and its implications for stocking rates are discussed.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 103 , Issue 1 , August 1984 , pp. 161 - 170
Copyright
Copyright © Cambridge University Press 1984

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References

Agricultural Research Council (1980). Requirements for protein. In The Nutrient Requirements of Ruminant Livestock, pp. 121–181. Farnham Royal: Commonwealth Agricultural Bureaux.Google Scholar
Castle, M. E., Watson, J. N. & Leaver, J. D. (1979). A comparison between barley and ground nut as supplements for dairy cows at pasture. Grass and Forage Science 34, 197–201.CrossRefGoogle Scholar
Combfllas, J., Baker, R. D. & Hodgson, J. (1979). Concentrate supplementation and the herbage intake and milk production of heifers grazing Cenchrus ciliaris. Grass and Forage Science 34, 303–310.Google Scholar
Curran, M. K., Leaver, J. D. & Weston, E. W. (1967). A note on the use of chromic oxide incorporated in a feed to estimate faecal output in ruminants. Animal Production 9, 561–564.Google Scholar
Frame, J. (1981). Herbage mass. In Sward Measurement Handbook (ed. Hodgson, J., Baker, R. D., Davies, Alison, Laidlaw, A. S. and Leaver, J. D.). Hurley: British Grassland Society.Google Scholar
Gordon, F. J. (1980). The role of supplements in the spring-calving dairy herd. In Supplementation and Effective Use of Grassland for Dairying. Winter Meeting 1980, British Grassland Society, pp. 1.1–1.17.Google Scholar
Gordon, F. J. (1981). Potential for change in the output of milk from grassland. In Grassland in the British Economy (ed. Jollans, J. L.) CAS Paper 10. Reading: Centre for Agricultural Strategy.Google Scholar
Holmes, W. (1976). Aspects of the use of energy and of concentrate feeds in grazing management. In Pasture Utilization by the Grazing Animal (ed. Hodgson, J. and Jackson, D. K.). Occasional Symposium No. 8, British Grassland Society, pp. 141–145.Google Scholar
Holmes, W. (1980). Grazing management. In Grass, its Production and Utilisation (ed. Holmes, W.). Oxford: Blackwells.Google Scholar
Holmes, W. & Jones, J. G. W. (1964). The efficiency of utilisation of fresh grass. Journal of the British Grassland Society 19, 119–129.CrossRefGoogle Scholar
Jamieson, W. & Hodgson, J. (1979). The effect of daily herbage allowance and sward characteristics upon the ingestive behaviour and herbage intake of calves under strip-grazed management. Grass and Forage Science 34, 261–271.Google Scholar
Jennings, P. G. (1983). Studies on the influence of supplementary feeding on the performance of grazing dairy cows. Ph.D. thesis, Wye College, University of London.Google Scholar
Jennings, P. G. & Holmes, W. (1983). The influence of the quality of concentrate supplement on the performance of high yielding dairy cows on continuously stocked pasture. Animal Production 36, 507.Google Scholar
Jones, M. B., Collett, B. & Brown, S. (1982). Sward growth under cutting and continuous stocking managements: sward canopy structure, tiller density and leaf turnover. Grass and Forage Science 37, 67–74.Google Scholar
Journet, M. & Demabquilly, C. (1979). Grazing. In Feeding Strategy for the High Yielding Dairy Cow (ed. Broster, W. H. and Swan, Henry), European Association for Animal Production Publication, No. 25 pp. 295–321. London: Granada.Google Scholar
Leaver, J. D. (1981). The contribution of grass and conserved forages to the nutrient requirements for milk production. In Recent Advances in Animal Nutriton-1981 (ed. Haresign, W.), pp. 71–80. London: Butterworths.Google Scholar
Leaver, J. D., Campling, R. C. & Holmes, W. (1968). Use of supplementary feeds for grazing dairy cows. Dairy Science Abstracts 30, 355–361.Google Scholar
Le Du, Y. L. P., Baker, R. D. & Newberry, R. D. (1981). Herbage intake and milk production by grazing dairy cows. 3. The effect of grazing severity under continuous stocking. Grass and Forage Science 36, 307–318.CrossRefGoogle Scholar
Le Du, Y. L. P., Combellas, J., Hodgson, J. & Baker, R. D. (1979). Herbage intake and milk production by grazing dairy cows. 2. The effects of level of winter feeding and daily herbage allowance. Grass and Forage Science 34, 249–260.Google Scholar
Le Du, Y. L. P. & Penning, P. D. (1982). Animal based techniques for estimating herbage intake. In Herbage Intake Handbook (ed. Leaver, J. D.). Hurley, U.K.: British Grassland Society.Google Scholar
Mathieson, J. & Davidson, J. (1970). The automated estimation of chromic oxide. Proceedings of Nutrition Society 29, 30A–31A.Google Scholar
Meijs, J. A. C. (1982). The influence of concentrate supplementation on herbage intake by grazing dairy cows. 1. Report on the experiment on herbage intake in 1981. Report No. 143, Instituut voor Veevoedingsonderzoek, Lelystad, Netherlands.Google Scholar
Meijs, J. A. C. (1983). The influence of concentrate supplementation on herbage intake by grazing dairy cows. 2. Report of the experiment on herbage intake in 1982. Report No. 149, Instituut voor Veevoedings-onderzoek, Lelystad, Netherlands.Google Scholar
Milne, J. A., Maxwell, T. J. & Souter, W. (1981). Effects of supplementary feeding and herbage mass on the intake and performance of grazing ewes in early lactation. Animal Production 32, 185–195.Google Scholar
Minson, D. J. (1981). The effects of feeding protected and unprotected casein on the milk production of cows grazing ryegrass. Journal of Agricultural Science, Cambridge 96, 239–241.Google Scholar
Mitcheson, R. C. (1969). Determination of nitrogen in malt and barley using the Technicon auto-analyser. Technicon Symposium, No. 140.Google Scholar
Morgan, D. E. & Barber, W. P. (1979). The adviser's approach to predicting the metabolizable energy value of feeds for ruminants. In Recent Advances in Animal Nutrition (ed. Haresign, W. and Lewis, D.), pp. 93–106. London: Butterworths.Google Scholar
Palmquist, D. L. & Jenkins, T. C. (1980). Fat in lactation rations: review. Journal of Dairy Science 63, 1–14.CrossRefGoogle ScholarPubMed
Sarker, A. B. & Holmes, W. (1974). The influence of supplementary feeding on the herbage intake and grazing behaviour of dry cows. Journal of the British Grassland Society 29, 141–143.CrossRefGoogle Scholar
Wanyoike, M. & Holmes, W. (1981). A comparison of indirect methods of estimating feed intake on pasture. Grass and Forage Science 36, 221–225.CrossRefGoogle Scholar
Young, N. E., Newton, J. E. & Orr, R. J. (1980). The effect of cereal supplement during early lactation on the performance and intake of cows grazing perennial ryegrass at three stocking rates. Grass and Forage Science 35, 197–202.CrossRefGoogle Scholar
Zoby, J. L. F. (1981). Factors affecting herbage intake and grazing behaviour in cattle. Ph.D. thesis, Wye College, University of London.Google Scholar
Zoby, J. L. F. & Holmes, W. (1983). The influence of size of animal and stocking rate on the herbage intake and grazing behaviour of cattle. Journal of Agricultural Science, Cambridge 100, 139–148.Google Scholar