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Effect of Physical Form and Amount of Citrus Pulp on Utilization of Complete Feeds for Dairy Cattle¹

Dairy Science Department, University of Florida, Gainesville 32611

ABSTRACT

Experiment 1 tested effects of conventional pulp on rumen fermentation in five groups of fistulated steers. All rations were hay and concentrates with 0 to 60% citrus pulp. Acetate/propionate ratios were over 4 in all cases, and no significant difference resulted from percent of citrus pulp. Digestibilities of energy, dry matter, and protein were unaffected by portion of citrus pulp.

The second experiment was similar to the first, but the controlled variable was the portion of pellets in a constant (33%) citrus pulp. Rumen volatile fatty acids data were similar to those of experiment 1 in that all were normal and no differences were significant. The average acetate/propionate ratio was about 4.

Experiment 3 involved two separate switchback trials in which the comparison was pelleted with conventional citrus pulp. The criterion was milk composition of fat, solids not fat, protein, titratable acidity, and chloride. All observations were normal, and no treatment effects occurred.

¹ Florida Agricultural Experiment Station Journal Series Number 5267.

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