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Journal of Dairy Science Vol. 48 No. 8 1046-1052
© 1965 by American Dairy Science Association ®
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Effects of Feeding Unlike Forages, Singly and in Combination, on Voluntary Dry Matter Consumption and Performance of Lactating Cows1

W. J. Miller, C. M. Clifton, J. K. Miller2 and P. R. Fowler

Dairy Science Department, University of Georgia, Athens

ABSTRACT

Three groups of six lactating dairy cows each were fed: a) grass-legume silage, ad libitum; b) succulent pasture, ad libitum; and c) silage, ad libitum plus 1 hr of pasture daily. Milk production, weight gains, and forage consumption of those fed the combination of forages were significantly greater than expected. Most of the beneficial interaction was attributed to an increase in forage consumption. Digestibility was not affected by the combination. However, some increase in efficiency of digested nutrients could not be excluded.

In another study, 24 lactating cows were fed: Coastal Bermudagrass silage; Tift Sudangrass silage; or a combination of these silages in a double-reversal experiment. Cows fed Sudangrass silage produced more milk than those given the Bermudagrass. Dry matter consumption was significantly greater for the combination group. However, differences in milk production and weight gains were not significant. Thus, the nonadditive effects of the substances which cause low dry matter consumption of these two silages was not large under conditions of the experiment.

FOOTNOTES

1 Journal Paper no. 405 of the College Experiment Station of the University of Georgia, Athens.

2 Present address: UT-AEC Agricultural Research Laboratory, Oak Ridge, Tennessee.






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Copyright © 1965 by the American Dairy Science Association ®.