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total tract apparent digestibility, Serum Fatty Acid Profile, and Productive Performances of Mid-lactating Dairy Cows Fed with Dietary Betaine

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Journal of Agricultural Science and Technology(A) 2020年第5期10卷 237-246页

作者： Hao-Che Hung Chia-Yu Tsai Gwinyai Chibisa Mireille Chahine Pedram Rezamand Deptartment of Animal Veterinaryand Food SciencesUniversity of IdahoMoscowIdaho 83844-2330USA Twin Falls Research and Extention Center University of IdahoMoscowIdaho 83844-2330USA

It is hypothesized that betaine supplementation improves production performance in mid-lactation dairy ***-one mid-lactation dairy cows were assigned to a 3×3 Latin square design with three periods of 28 d each and fed three treatments of betaine(0,100,and 200 g/d).Milk samples were collected on day 21 and day 28 of each *** days 21 to 28,cows were fed with chromic oxide(15 g/d per cow).On days 26 to 28,fecal samples were collected to determine apparent total tract nutrient *** samples were obtained on days 26 to 28 of each period for fatty acid(FA)*** were analyzed using the Proc Mixed in *** total tract dry matter(DM)digestibility tended to be greater for cows supplemented with 100 g betaine as compared to no dietary betaine(61 vs.58±1%;p=0.1).In contrast,DM intake(DMI),milk fat percent,milk yield,energy-corrected milk(ECM)yield,and milk FA composition did not differ among *** of betaine can decrease the serum saturated FA C11,C12,C15 and C17,total monounsaturated FA,and C18:2 all trans-9,*** addition,total serum n-3 polyunsaturated FA was significantly *** result can decrease total serum n-6 to n-3 ratio(6.80,7.07,and 6.50±0.16%,for 0,100,and 200 g betaine,respectively;p=0.04).Overall,even betaine supplementation did not change DMI or production,betaine could affect the DM digestibility and serum FA biosynthesis.

关键词： Betaine supplementation apparent total tract nutrient digestibility production performance

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