National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Provision of nutrients in balanced form and required amount is crucial to meet the productive targets in dairy cows. Among the various nutrients, protein is the most important nutrient for milk production. Methionine and lysine are considered as the first and second limiting amino acids for milk protein synthesis because of their low concentrations in feed protein as compared to their concentrations in milk and ruminally synthesized bacterial protein. Choline, a component of phospholipid and methyl donor, plays an essential role in biosynthesis and secretion of milk. In addition, choline is a component of the neurotransmitter acetylcholine and is used to synthesize the ubiquitous phospholipid, phosphatidylcholine, via the cytidinediphosphate choline pathway. As dietary methionine, lysine and choline are degraded extensively in the rumen, additional methionine, lysine and choline are supplemented in rumen protected form. About 28% of absorbed methionine is used for choline synthesis. Supply of methionine and choline enhance the capacity of liver to export triacylglycerol (TAG) in the form of VLDL and help ameliorate the negative effects of fatty acid accumulation in the liver soon after parturition.
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