Effects of a molasses-coated cottonseed product on diet digestibility, performance, and milk fatty acid profile of lactating dairy cattle

Journal of Dairy Science
C R Mullins, B J Bradford

Abstract

An experiment was conducted to evaluate the effects of a molasses-coated cottonseed product on nutrient digestibility and milk fatty acid (FA) composition of lactating dairy cattle. The effect of a direct-fed microbial (DFM) product was also examined. Twelve Holstein cows (693+/-85kg of body weight, 127+/-39 d in milk, 2.08+/-0.29 lactations; mean +/- SD) were randomly assigned to sequence in a replicated 4 x 4 Latin square design balanced for carryover effects. Cows were fed 1 of 4 treatments during each of the four 14-d periods: a control diet including 11.4% (dry matter basis) reginned cottonseed (CON), a diet with 14.4% molasses-coated cottonseed to match the cottonseed inclusion rate of the control diet (TC), the control diet with the addition of a liquid form of the cotton coating used to produce molasses-coated cottonseed (LC), and the LC diet with the addition of a DFM (LC+DFM). Diets were formulated for equal concentrations of neutral detergent fiber, crude protein, ether extract, and macrominerals. Treatments had no effect on dry matter intake, apparent total-tract nutrient digestibility, or milk production. The molasses coat, in either form, tended to decrease concentrations of odd-chain FA (2.25 and 2.31 vs. 2.35 g/...Continue Reading

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