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Journal of Dairy Science Vol. 55 No. 12 1787-1791
© 1972 by American Dairy Science Association ®
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Effects of Feeding Polyethylene Pellets to Cows Receiving an All-Concentrate Diet1

J. L. Cunnningham2, L. J. Bush and G. D. Adams

Department of Animal Sciences and Industry,and R. D. Morrison, Department of Mathematics and Statistics, Oklahoma State University, Stillwater 74074

ABSTRACT

Polyethylene pellets were administered at different stages of the lactation cycle to dairy cows fed an all-concentrate ration. In Trial 1, 18 lactating cows were started on experimental rations 9 weeks after calving, and in Trial 2, 12 cows were started about a week prior to calving. Treatment groups were: a) grain plus hay 50:50, b) all-grain, and c) all-grain plus 2.7 kg polyethylene fed over 12 days at the start of the trial. Response criteria were feed intake, milk yield and composition, proportion of ruminal volatile fatty acids and ruminating activity.

Under the experimental conditions imposed, feeding polyethylene pellets did not alleviate the undesirable effects associated with the omission of natural roughage from rations of lactating cows. Feed intake was not maintained at a satisfactory amount, and proportions of rumen volatile fatty acids were not commensurate with production of milk having desirable fat percentage. The incidence of "off-feed" conditions was not reduced by feeding of polyethylene pellets.

FOOTNOTES

1 Journal Article 2429 of the Agricultural Experiment Station, Oklahoma State University, Stillwater. This research was supported in part by Farmland Industries, Inc., Kansas City, Missouri

2 Taken from a thesis submitted by the senior author in partial fulfillment of the requirements for the M.Sc. degree.






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Copyright © 1972 by the American Dairy Science Association ®.