Effect of molasses supplementation on the production of lactating dairy cows fed diets based on alfalfa and corn silage

Journal of Dairy Science
G A Broderick, W J Radloff

Abstract

Adding sugar to the diet has been reported to improve production in dairy cows. In each of 2 trials, 48 lactating Holsteins (8 with ruminal cannulas) were fed covariate diets for 2 wk, blocked by days in milk into 12 groups of 4, and then randomly assigned to diets based on alfalfa silage containing 4 levels of dried molasses (trial 1) or liquid molasses (trial 2). In both studies, production data were collected for 8 wk, ruminal samples were taken in wk 4 and 8, and statistical models were used that included covariate means and block. In trial 1, experimental diets contained 18% CP and 0, 4, 8, or 12% dried molasses with 2.6, 4.2, 5.6, or 7.2% total sugar. With increasing sugar, there was a linear increase in dry matter intake (DMI), and digestibility of dry matter (DM) and organic matter (OM), but no effect on yield of milk or protein. This resulted in linear decreases in fat-corrected milk (FCM)/DMI and milk N/N-intake. There was a linear decrease in urinary N with increasing sugar, and quadratic effects on milk fat content, yield of fat and FCM, and ruminal ammonia. Mean optimum from these quadratic responses was 4.8% total sugar in these diets. In trial 2, experimental diets contained 15.6% crude protein (CP) and 0, 3, 6, ...Continue Reading

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Citations

Mar 8, 2016·Asian-Australasian Journal of Animal Sciences·Mohammad Khairul AlamHiroaki Sano
Mar 14, 2017·Journal of Animal Science and Biotechnology·Essi Evans, Ulrike Messerschmidt
Dec 3, 2016·PloS One·Rafael Sandin RibeiroAlexandre Vieira Chaves
Mar 11, 2006·Journal of Dairy Science·J L FirkinsN R St-Pierre
May 6, 2014·Journal of Dairy Science·C F Vargas-RodriguezB J Bradford
May 25, 2011·Journal of Dairy Science·M L EastridgeJ L Firkins
Nov 29, 2008·Journal of Dairy Science·G A BroderickV A Ishler
May 16, 2012·Journal of Animal Science·S J KrizsanP Huhtanen
Apr 22, 2020·The Journal of Dairy Research·Andrea FrancesioNicholas N Jonsson
Jun 12, 2017·Applied Microbiology and Biotechnology·Minh Thuy TangNaoki Nishino
Dec 26, 2018·Journal of Dairy Science·Jörg R AschenbachGregory B Penner
Dec 26, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·André F Brito, Yu Zang

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