Effect of Restaurant Fat on Milk Yield and Composition of Dairy Cows Limit-Fed Concentrate Diet with Free Access to Forage
Ten lactating multiparous Holstein cows were used in
a cross-over design with two dietary treatments and 28-d periods
(with 14 d as an adaptation) to study the effect of restaurant fat on
milk production and composition. Each cow was offered 14.7 kg
DM /d of the basal concentrate diet based on barley and corn (crude
protein = 17.7%, neutral detergent fiber = 23.5%, and acid detergent
fiber = 5.8% of dry matter) with free access to alfalfa. Dietary
treatments were arranged as supplying each cow with 0 (CONTROL)
or 150 g/day (RF) of restaurant fat. Supplemental RF did not
significantly (P > 0.25) affect milk yield, composition, and
composition yields, except for milk fat contents. Milk fat contents
were depressed (P < 0.05) with supplemental RF. Our results indicate
that RF could depress milk fat without affecting milk yield and that
the depression in milk fat in response to RF precedes the depression
in milk yield.
[1] Awawdeh, M.S., Obeidat, B.S., Kridli, R.T., 2008. Yellow grease as an
alternative energy source for nursing Awassi ewes and their suckling
lambs. Anim. Feed Sci. Tech. (submitted).
[2] Cant, J.P., DePeters, E.J., Baldwin R.L., 1993. Mammary uptake of
energy metabolites in dairy cows fed fat to milk protein depression. J.
Dairy Sci. 76, 2254-2265.
[3] Chow, J.M., DePeters, E.J., Baldwin, R.L., 1990. Effect of rumenprotected
methionine and lysine on casein in milk when diets high in fat
or concentrate are fed. J. Dairy Sci. 73, 1051-1061.
[4] Clapperton, J.L., Steele, W., 1983. Fat supplementation in animal
production-ruminants. Proc. Nutr. Soc. 42, 343-350.
[5] DePeters, E.J., Taylor, S.J., Finley, C.M., Famula, T.R., 1987. Dietary
fat and nitrogen composition of milk from lactating cows. J. Dairy Sci.
70, 1192-1201.
[6] Grummer, R.R., 1992. Inedible fat and greases. In: A.M. Pearson, T.R.
Dutson (Eds), Inedible Meat By-Products. Advances in Meat Research.
8, 113-148.
[7] Jenkins, T.C., Jenny, B.F., 1989. Effect of hydrogenated fat on feed
intake, nutrient digestion, and lactation performance of dairy cows. J.
Dairy Sci. 72, 2316-2324.
[8] NRC. 2001. Nutrient Requirements of Dairy Cattle. 7th ed. National
Academy Press, Washington, DC.
[1] Awawdeh, M.S., Obeidat, B.S., Kridli, R.T., 2008. Yellow grease as an
alternative energy source for nursing Awassi ewes and their suckling
lambs. Anim. Feed Sci. Tech. (submitted).
[2] Cant, J.P., DePeters, E.J., Baldwin R.L., 1993. Mammary uptake of
energy metabolites in dairy cows fed fat to milk protein depression. J.
Dairy Sci. 76, 2254-2265.
[3] Chow, J.M., DePeters, E.J., Baldwin, R.L., 1990. Effect of rumenprotected
methionine and lysine on casein in milk when diets high in fat
or concentrate are fed. J. Dairy Sci. 73, 1051-1061.
[4] Clapperton, J.L., Steele, W., 1983. Fat supplementation in animal
production-ruminants. Proc. Nutr. Soc. 42, 343-350.
[5] DePeters, E.J., Taylor, S.J., Finley, C.M., Famula, T.R., 1987. Dietary
fat and nitrogen composition of milk from lactating cows. J. Dairy Sci.
70, 1192-1201.
[6] Grummer, R.R., 1992. Inedible fat and greases. In: A.M. Pearson, T.R.
Dutson (Eds), Inedible Meat By-Products. Advances in Meat Research.
8, 113-148.
[7] Jenkins, T.C., Jenny, B.F., 1989. Effect of hydrogenated fat on feed
intake, nutrient digestion, and lactation performance of dairy cows. J.
Dairy Sci. 72, 2316-2324.
[8] NRC. 2001. Nutrient Requirements of Dairy Cattle. 7th ed. National
Academy Press, Washington, DC.
@article{"International Journal of Biological, Life and Agricultural Sciences:59024", author = "Mofleh S. Awawdeh", title = "Effect of Restaurant Fat on Milk Yield and Composition of Dairy Cows Limit-Fed Concentrate Diet with Free Access to Forage", abstract = "Ten lactating multiparous Holstein cows were used in
a cross-over design with two dietary treatments and 28-d periods
(with 14 d as an adaptation) to study the effect of restaurant fat on
milk production and composition. Each cow was offered 14.7 kg
DM /d of the basal concentrate diet based on barley and corn (crude
protein = 17.7%, neutral detergent fiber = 23.5%, and acid detergent
fiber = 5.8% of dry matter) with free access to alfalfa. Dietary
treatments were arranged as supplying each cow with 0 (CONTROL)
or 150 g/day (RF) of restaurant fat. Supplemental RF did not
significantly (P > 0.25) affect milk yield, composition, and
composition yields, except for milk fat contents. Milk fat contents
were depressed (P < 0.05) with supplemental RF. Our results indicate
that RF could depress milk fat without affecting milk yield and that
the depression in milk fat in response to RF precedes the depression
in milk yield.", keywords = "Dairy Cows, Restaurant Fat, Lipids.", volume = "3", number = "9", pages = "478-3", }