Hostname: page-component-8448b6f56d-cfpbc Total loading time: 0 Render date: 2024-04-20T02:58:40.285Z Has data issue: false hasContentIssue false
  • English
  • Français

Performance of dairy cows offered isonitrogenous diets containing urea or fishmeal in early and in mid-lactation

Published online by Cambridge University Press:  24 July 2007

J. D. Oldham ,
D. J. Napper ,
T. Smith  and
Rosemary J. Fulford
J. D. Oldham
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading RG2 9AT
D. J. Napper
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading RG2 9AT
T. Smith
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading RG2 9AT
Rosemary J. Fulford
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading RG2 9AT
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

1. Sixteen Friesian cows were used in Expt 1 to measure the effect of substituting urea-N with fishmeal-N either in early lactation (Part 1) or in mid-lactation (Part 2).

2. In Part 1 (days 15–84 of lactation) the major N constituent of the concentrate was urea (U), urea-N: fishmeal-N in the ratio 2:1 (UF) or 1:2 (FU), or fishmeal (F). In Part 2 (days 84–1 75 of lactation) only urea (UM) and fishmeal (FM) were used.

3. Replacement of urea-N with fishmeal-N significantly (P < 0.05) increased yield of milk protein both in early and in mid-lactation. At both stages of lactation the cows were, by calculation, in positive energy balance. In mid-lactation replacement of urea-N by fishmeal-N significantly depressed (P < 0.001) the concentration of fat in milk.

4. Blood urea concentration decreased with increasing fishmeal inclusion (P < 0.05) from U to FU.

5. In Expt 2 the diets used in Expt 1, Part 1, were offered at a maintenance level of feeding to non-pregnant, non-lactating heifers in a 4 x 4 Latin square design experiment. Digestibility of dry matter, organic matter and cell-wall constituents increased progressively (P < 0.05) with the first two increments of fishmeal inclusion.

6. A major effect of replacing urea-N with fishmeal-N was to increase digestible organic matter intake (DOMI) and differences in DOMI between treatments in Expt 1, Part 1, accounted for observed differences in performance.

Type
Papers on General Nutrition
Information
British Journal of Nutrition , Volume 53 , Issue 2 , March 1985 , pp. 337 - 345
Copyright
Copyright © The Nutrition Society 1985

References

Agricultural Research Council (1980). The Nutrient Requirements of Ruminant Livestock. Commonwealth Agricultural Bureaux Farnham Royal, England.Google Scholar
Cotta, M. A. & Russell, J. B. (1982). Journal of Dairy Science 65, 226–234.CrossRefGoogle Scholar
Cottrill, B. R., Beever, D. E., Austin, A. R. & Osbourn, D. F. (1982). British Journal of Nutrition 48, 527–541.CrossRefGoogle Scholar
Ekern, A. (1982). In Protein Contribution of Feedstuffs for Ruminants, pp. 86–102 [Miller, E. L., Pike, I. H. and Van Es, A. J. H., editors]. London: Butterworths.CrossRefGoogle Scholar
Hespell, R. B. & Bryant, M. P. (1979). Journal of Animal Science 49, 1640–1659.CrossRefGoogle Scholar
Huber, J. T. (1975). Journal of Animal Science 41, 954–961.CrossRefGoogle Scholar
Kaufmann, W. & Hagemeister, H. (1975). Übersichten zur Tierernährung 3, 33–65.Google Scholar
McAllan, A. B. & Smith, R. H. (1983). British Journal of Nutrition 50, 445–454.CrossRefGoogle Scholar
Maeng, W. J., Van Nevel, C. J., Baldwin, R. L. & Morris, J. G. (1976). Journal of Dairy Science 59, 68–79.CrossRefGoogle Scholar
Miller, E. L., Galway, N. W., Newman, G. & Pike, I. H. (1982). In Protein Contribution of Feedstuffs for Ruminants, pp. 131–141 [Miller, E. L., Pike, I. H. and Van Es, A. J. H., editors]. London: Butterworths.CrossRefGoogle Scholar
Ministry of Agriculture, Fisheries and Food (1975). Energy Allowances and Feeding Systems for Ruminants. Technical Bulletin no. 33. London: H.M. Stationery Office.Google Scholar
Nicholson, J. W. G. & Sutton, J. D. (1971). Journal of Dairy Research 38, 363–372.CrossRefGoogle Scholar
Oldham, J. D. (1981). In Recent Advances in Animal Nutrition-1980, pp. 33–65 [Haresign, W., editor]. London: Butterworths.CrossRefGoogle Scholar
Oldham, J. D. (1984). Journal of Dairy Science 67, 1090–1114.CrossRefGoogle Scholar
Oldham, J. D., Broster, W. H., Napper, D. J. & Smith, T. (1979). Proceedings of the Nutrition Society 38, 128A.Google Scholar
Oldham, J. D., Fulford, R. J. & Napper, D. J. (1981). Proceedings of the Nutrition Society 40, 30A.Google Scholar
Oldham, J. D. & Smith, T. (1982). In Protein Contribution of Feedstuffs for Ruminants pp. 103–130 [Miller, E. L., Pike, I. H. and Van Es, A. J. H., editors]. London: Butterworths.CrossRefGoogle Scholar
Ørskov, E. R., Fraser, C., McDonald, I. & Smart, R. I. (1974). British Journal of Nutrition 31, 89–98.CrossRefGoogle Scholar
Ørskov, E. R., Reid, G. W. & McDonald, I. (1981). British Journal of Nutrition 45, 547–555.CrossRefGoogle Scholar
Phipps, R. H. (1978). In Forage Maize. Production and Utilisation, pp. 263–295 [Bunting, E. S., Pain, B. F., Phipps, R. H., Wilkinson, J. M., Gunn, R. E., editors]. London: Agricultural Research Council.Google Scholar
Polan, C. W., Miller, C. N. & McGilliard, N. L. (1976). Journal of Dairy Science 59, 1910–1914.CrossRefGoogle Scholar
Poos, M. I., Bull, L. S. & Hemken, R. W. (1979). Journal of Animal Science 49, 1417–1426.CrossRefGoogle Scholar
Redman, R. G., Kellaway, R. C. & Leibholz, J. (1980). British Journal of Nutrition 44, 343–354.CrossRefGoogle Scholar
Rowlands, G. J., Little, W., Manston, R. & Dew, S. M. (1974). Journal of Agricultural Science, Cambridge 83, 27–35.CrossRefGoogle Scholar
Satter, L. D. & Roffler, R. E. (1975). Journal of Dairy Science 58, 1219–1237.CrossRefGoogle Scholar
Smith, T. (1979). Journal of the Science of Food and Agriculture 30, 215–217.CrossRefGoogle Scholar
Sutton, J. D. (1982). In Recent Advances in Animal Nutrition - 1981, pp. 35–48 [Haresign, W., editor]. London: Butterworths.Google Scholar
Van Horn, H. H., Zometa, C. A., Wilcox, C. J., Marshall, S. P. & Harris, B. (1979). Journal of Diary Science 62, 1086–1093.CrossRefGoogle Scholar
Van Soest, P. J. & Wine, R. H. (1967). Journal of the Association of Official Analytical Chemists 50, 50–55.Google Scholar
Verite, R., Journet, M. & Jarrige, R. (1979). Livestock Production Science 6, 349–367.CrossRefGoogle Scholar
Wohlt, J. E. & Clark, J. H. (1978). Journal of Dairy Science 61, 916–931.CrossRefGoogle Scholar