Technical and economic effects of feeding one vs. multiple total mixed rations estimated by stochastic simulation under different dairy herd and management characteristics

Livestock Production Science

Volumn 45, Issue 1, 1996, Pages 23-33

  Østergaard, Søren ^a   Sørensen, Jan Tind ^b   Hindhede, Jens ^b   Kristensen, Anders Ringgaard ^a  

^a UNIVERSITY OF COPENHAGEN   (Denmark)

^b DANISH INSTITUTE OF AGRICULTURAL SCIENCES   (Denmark)

Author keywords

Dairy cow; Grouping; Production potential; Replacement; Reproduction

Indexed keywords

BOS TAURUS;

EID: 0037581538     PISSN: 03016226     EISSN: None     Source Type: Journal    
DOI: 10.1016/0301-6226(95)00084-4     Document Type: Article

References (23)

1. Broster, W.H., Clements, A.J., Broster, V.J., Smith, T., Siviter, J.W. and Randolph, E.H., 1989. Effect of amount and composition of feed given over three lactations on the performance of the dairy cow. J. Dairy Res., 56: 561-577.
2. Cassel, E.K., Merrill, W.G., Milligan, A.R. and Guest, R.W., 1984. Evaluation of systems for feeding supplemental concentrates to cows in groups. J. Dairy Sci., 67: 560-568.
3. Chase, U.E., 1990. One group TMR's - where do they fit? In: Chase, L. and Roseler, D. (Eds.), Proceedings 1990 Feed Dealer Seminars. Animal Science, Mimeograph Series, 145: 56-58.
4. Clark, P.W., Ricketts, R.E., Belyea, R.L. and Krause, G.F., 1980. Feeding and managing dairy cows in three versus one production group. J. Dairy Sci., 63: 1299-1308.
5. Davenport, D.G. and Rakes, A.H., 1973. Response of dairy cows to two systems of distributing annual total digestible nutrients over the lactation cycle. J. Dairy Sci., 56: 465-472.
6. Everson, R.A., Jorgensen, N.A., Crowley, J.W., Jensen, E.L. and Barrington, G.P., 1976. Input-output of dairy cows fed a complete Ration of a constant or variable forage-to-grain ratio. J. Dairy Sci., 59: 1776-1787.
7. Krohn, C.C. and Konggard, S.P., 1980. Investigations concerning feed intake and social behaviour among group fed cows under loose housing conditions. IV. Effect of group change in dairy cows. 490. Report from the National Institute of Animal Science, Denmark, 30 pp. (with English summary and subtitles).
8. Kroll, O., Owen, J.B. and Whitaker, C.J., 1986. Variation in the complete diet composition given during the winter period to an autumn-calving herd. J. Agric. Sci., Camb., 106: 297-306.
9. Kroll, O., Owen, J.B. and Whitaker, C.J., 1987. Grouping and complete diet composition in relation to parity and potential yield in dairy cows. J. agric. Sci., Camb., 108: 281-291.
10. Morrow, D.A., 1976. Fat cow syndrome. J. Dairy Sci., 59: 1635-1629.
11. Østergaard, V., 1979. Strategies for concentrates feeding to attain optimum feeding level in high yielding dairy cows. 482. Report from the National Institute of Animal Science, Denmark, 138 pp.
12. Østergaard, S., Sørensen, J.T., Kristensen, V.F. and Kristensen, T., 1994. Modelling of the production of a dairy cow in a net energy system. Presentation and documentation of the PC-model SIMCOW. 24. Report from the National Institute of Animal Science, Denmark, 32 pp. (with English summary and subtitles).
13. Pecsok, S.R., McGilliaid, M.L., James, R.E., Johnson, T.G. and Holter, J.B., 1992. Estimating production benefits through simulation of group and individual feeding of dairy cows. J. Dairy Sci., 75: 1604-1615.
14. Pedron, O., Cheli, F., Senatore, E., Baroli, D. and Rizzi, R., 1993. Effect of body condition score at calving on performance, some blood parameters, and milk fatty acid composition in dairy cows. J. Dairy Sci., 76: 2528-2535.
15. Rakes, A.H., 1969. Complete rations for dairy cattle. J. Dairy Sci., 52: 870-875
16. Smith, N.E., Ufford, G.R., Coppock, C.E. and Merrill W.G., 1978. One group versus two group systems for lactating cows fed complete rations. J. Dairy Sci., 61: 1138-1145.
17. Sowerby, M.E. and Polan, C.E., 1978. Milk production response to shifting cows between intraherd groups. J. Dairy Sci., 61: 455-460.
18. Spahr, S.L., 1977. Optimum rations for group feeding. J. Dairy Sci., 60: 1337-1344.
19. Sørensen, J.T., Kristensen, E.S. and Thysen, I., 1992. A stochastic model simulating the dairy herd on a PC. Agric. Systems, 39: 177-200.
20. Waltner, S.S., McNamara, J.P. and Hillers, J.K., 1993. Relationship of body condition score to production variables in high producing Holstein dairy cattle. J. Dairy Sci., 76: 3410-3419.
21. Weisbjerg, M.R. and Hvelplund, T., 1993. Estimation of net energy content (FU) in feeds for cattle. 3. Report from the National Institute of Animal Science, Denmark, 39 pp. (with English summary and subtitles).
22. Wilk, J.C., Rakes, A.H., Davenport, D.G. and Wells, R.C., 1978, Comparison of two systems for group feeding dairy cows. J. Dairy Sci., 61: 1429-1434.
23. Williams, C.B. and Oltenacu, P.A., 1992. Evaluation of criteria used to group lactating cows using a dairy production model. J. Dairy Sci., 75: 155-160.