Update on Rumen-protected Choline in Dairy Cow Nutrition
نویسنده
چکیده
Choline is a quasi-vitamin that has a variety of functions in mammalian metabolism. Its major functions are as the predominant phospholipid contained in the membranes of all cells in the body (as phosphatidylcholine), a component of the neurotransmitter acetylcholine, and as a direct precursor to betaine in methyl metabolism. It is beyond the scope of this paper to review these functions in depth; however, excellent reviews have been published within the past several years that provide substantive overviews of choline metabolism with orientation to the dairy cow (Donkin, 2002; Pinotti et al., 2002). The purpose of this paper is to provide a focused review on the potential for application of rumen-protected choline during the transition period of dairy cows with the end goal of improving transition period success. Furthermore, I will review recent information on the role of choline in reproductive performance. Finally, I will comment on the future of choline as a nutrient in dairy cattle nutrition.
منابع مشابه
Effects of Feeding Rumen Protected Choline and Vitamin E on Milk Yield, Milk Composition, Dry Matter Intake, BodyCondition Score and Body Weight in Early Lactating Dairy Cows
Twenty four primiparous and multiparous Holstein cows on early lactation, beginning five weeks postpartum, were used for four weeks to investigate the effects of supplemention of rumen-protected choline (RPC) or vitamin E on milk yield, milk composition, dry matter intake, body condition score and body weight. The cows were randomly assigned to one of the following treatments: I)no supplement (...
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The effects of a dietary supplement of rumen-protected choline on feed intake, milk yield, milk composition, blood metabolites, and hepatic triacylglycerol were evaluated in periparturient dairy cows. Thirty-eight multiparous cows were blocked into 19 pairs and then randomly allocated to either one of 2 treatments. The treatments were supplementation either with or without (control) rumen-prote...
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