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The Utilization of Urea by Dairy Cattle

Virginial Agricultural Experiment Station, Virginia Polytechnic Institute, Blacksburg

ABSTRACT

Urea and cottonseed meal were of comparable value for milk production when incorporated into the concentrate mixtures at the levels used in this investigation. Addition of 22 g. of DL-methionine per cow per day to a ration containing urea did not produce any beneficial effects.

Addition of 200 lb. of ground corncobs per 1,000 lb. of concentrate mixture, so that the crude fiber content was doubled, did not adversely affect milk production or any of the other factors studied. Addition of urea to the corncob-concentrate mixture did not exhibit any beneficial effect on milk production or apparent digestibility of the feed constituents.

¹ Department of Dairy Husbandry.

² Department of Agricultural Chemistry.