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Journal of Dairy Science Vol. 52 No. 9 1404-1407
© 1969 by American Dairy Science Association ®
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Drylot Feeding versus Pasturing for Milk Production in Dairy Cattle1

A. L. Sendagi, R. H. Kliewer, F. B. Wolberg, M. A. Peters2, W. R. Bennett2 and K. J. Peterson

Department of Animal Science and Department of Veterinary Medecine, Oregon State University, Corvallis 97331

ABSTRACT

Ninety-eight cows of the Holstein and Jersey breeds were paired on production criteria and used in four separate trials over a four-year period to compare milk and milk constituent yields resulting from drylot feeding or grazing of irrigated pastures. Cows in drylot received grass silage and alfalfa hay during the first three trials and haylage during the fourth trial. Pastured cows remained on excellent-quality, irrigated, grass-legume pastures except at milking time. All cows consumed the same concentrate ration twice daily during milking, the concentrate being fed in proportion to the amount of milk produced.

Differences between pairmates in the production of milk, solids-not-fat, protein, and milk fat lacked statistical significance (P>.05) in all four trials. However, milk fat production during the third trial favored the pasture group. Complete lactation records (305-day, two times) showed no differences in milk constituent yields between cows in the drylot and their pairmates on pasture. However, milk production for complete records was significantly higher (P<.05 for the drylot during Trial III.

Observations on reproductive performance, udder health, and other disease problems indicated no marked differences between cows subjected to these two systems of feeding.

FOOTNOTES

1 Technical paper no. 2617, Oregon Agricultural Experiment Station, Corvallis, Oregon.

2 Present address: Clatsop Community College. Astoria, Oregon.






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Copyright © 1969 by the American Dairy Science Association ®.