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The effect of the plane and pattern of concentrate feeding on milk yield and composition in dairy cows

Published online by Cambridge University Press:  27 March 2009

C. L. Johnson
C. L. Johnson
Affiliation:
Department of Animal Physiology and Nutrition, University of Leeds
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Summary

Ninety-six Friesian cows were used to determine the effects of pattern of allocation of a fixed amount of concentrates on milk yield during the treatment and residual periods (weeks 1–20 and 21–44 respectively) and on the whole lactation. Thirty-two were in their second and the remainder in their third or later lactation. Second-lactation cows were used to form separate blocks.

Four treatments were imposed for the first 20 weeks of lactation; these were Graded (G), Woodman (W), High Fixed (HF), and Low Fixed (LF). The first three treatments involved the same total amount of concentrate but fed in different daily amounts. Treatment W received Woodman's standard (Evans, 1960) amounts of feed according to a predetermined lactation curve derived from earlier experience in the herd; treatment G reallocated the same allowance by feeding more than W in weeks 1–12 and less during weeks 13–20; the HF treatment was a fixed daily amount of 6·4 kg, in total also equal to W total. LF was a fixed daily amount of 4·0 kg/day. The maintenance allowance was the same for all cows within a block and based on hay, dried sugar-beet pulp and barley meal. During weeks 21–44 all cows within a block received the same treatment; either grazing or self-fed silage and supplementary concentrates according to the time of year.

There were significant differences in milk yield during the treatment period resulting from plane of feeding (W, G and HF greater than LF; P < 0·001) but no significant differences arising from the pattern of feeding. In the residual period (weeks 21–44) there was no significant difference between the yields of second-lactation treatment groups. Thus for the whole lactation the yields of treatments G, W and HF were significantly greater than LF. However, for the older cows there were differences in the residual period and treatment groups G and LF gave significantly more milk than group W (P < 0·001 and P < 0·05 respectively). Over the whole lactation treatment group G gave significantly more milk than LF (P < 0·001), W (P < 0·01) and HF (P < 0·05). Furthermore, the increase in total lactation yield of G compared with W was 4·5 times the increase observed in weeks 1–20.

Cows of both age groups on treatment HF, unlike those on treatments W and G, never achieved a distinct peak yield but their mean weekly rate of decline was significantly less.

Live-weight changes varied between treatments and between age groups and were significantly correlated with milk yield in weeks 1–20.

There were no significant effects of treatments on milk composition in either age group at any stage of the lactation. The minimum value for solids-not-fat content for the cows on the LF treatment was unacceptably low.

It is suggested that for cows of moderate yield potential fed to Woodman's standards (Evans, 1960) the actual pattern of feeding a predetermined amount of concentrates has little effect on the yield or quality of milk. For cows of high potential a redistribution of concentrates to allow earlier more generous feeding will increase milk yield.

The rate of decline of milk yield is a characteristic of both cow potential and pattern of feeding and an adoption of a standard 2½% a week should be viewed with caution.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 88 , Issue 1 , February 1977 , pp. 79 - 94
Copyright
Copyright © Cambridge University Press 1977

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References

Anon. (1975). Energy allowance and feeding systems for ruminants. Technical Bulletin 33, p. 23. Ministry of Agriculture, Fisheries and Food. London: H.M.S.O.Google Scholar
Blaxter, K. L. (1967). The feeding of dairy cows for optimal production. George Scott Robertson Memorial Lecture, Queens University of Belfast. November 1966.Google Scholar
British Standards Institute (1969). BSS 1063.Google Scholar
Broster, W. H. (1972). Effect on milk yield of cow of level of feeding during lactation. Dairy Science Abstracts 34, 265–88.Google Scholar
Broster, W. H. (1974). Response of the dairy cow to level of feeding. Biennial Review National Institute for Research in Dairying, pp. 14–34.Google Scholar
Broster, W. H., Broster, V. J. & Smith, T. (1969). Experiments on the nutrition of the dairy heifer. VIII. Effect on milk production of level of feeding at two stages of lactation. Journal of Agricultural Science, Cambridge 72, 229–45.CrossRefGoogle Scholar
Broster, W. H., Broster, V. J., Smith, T. & Siviter, J. W. (1975). Experiments on the nutrition of the dairy heifer. IX. Food utilization in lactation. Journal of Agricultural Science, Cambridge 84, 173–86.CrossRefGoogle Scholar
Burt, A. W. A. (1957). The effect of variations in nutrient intake upon yield and composition of milk. I. Variations in the amount and type of concentrates fed in winter rations. Journal of Dairy Research 24, 283–95.CrossRefGoogle Scholar
Evans, R. E. (1960). Rations for livestock. Bulletin 48, Ministry of Agriculture, Fisheries and Food. London: H.M.S.O.Google Scholar
Filmer, D. G., Roberts, P., Mines, K. A. & Clarkson, H. M. (1972). The effect of level of feeding on persistency of milk yield of Ayrshire cows. Animal Production 14, 309–15.Google Scholar
Griffiths, T. W. (1965). A comparison of two methods for allocating concentrates to dairy cows according to yield. Animal Production 7, 263–71.Google Scholar
Holmes, W., Reid, D., MacLusky, D. S., Waite, R. & Watson, J. N. (1957). Winter feeding of dairy cows. IV. The influence of four levels of concentrate feeding in addition to a basic ration of grass products on the production obtained from milking cows. Journal of Dairy Research 24, 1–10.CrossRefGoogle Scholar
Holmes, W., Arnold, G. W. & Provan, A. L. (1960). Bulk feeds for milk production. I. The influence of level of concentrate feeding in addition to silage and hay on milk yield and composition. Journal of Dairy Research 27, 191–204.CrossRefGoogle Scholar
Johnson, C. L. (1973). Some aspects of changing body composition of mice during successive pregnancies and lactations. Journal of Endocrinology 56, 37–46.CrossRefGoogle ScholarPubMed
Morgan, D. E. (1972). Annual Report of Science Arm, p. 98. Agricultural Development and Advisory Service, Ministry of Agriculture, Fisheries and Food. London: H.M.S.O.Google Scholar
Nicolaysen, R., Eeg-Larsen, N. & Malm, O. (1953). The physiology of calcium metabolism. Physiological Reviews 33, 424–44.CrossRefGoogle ScholarPubMed
Rook, J. A. F. & Campling, R. C. (1965). Effect of stage and number of lactation on the yield and composition of cow's milk. Journal of Dairy Research 32, 45–55.CrossRefGoogle Scholar
Westgarth, R. D. & Atkinson, J. M. (1966). Sequential rationing of concentrates to milking cows. Annual Report of the National Institute for Research in Dairying, pp. 144–6.Google Scholar
Wright, J. A., Rook, J. A. F. & Wood, P. D. P. (1974). The response in milk solids-not-fat and protein contents to improved feeding of cows receiving winter-stall diets and underfed for varying periods. Journal of Dairy Research 41, 155–64.CrossRefGoogle Scholar