title: Effect of varying levels of fatty acids from palm oil on feed intake and milk production in Holstein cows.
abstract: To determine the optimum feeding level of fatty acids of palm oil (PALM; Energizer RP10; 86.6% palmitic acid) on milk production, lactating cows (n = 18) were randomly assigned to a treatment sequence in replicated 4 x 4 Latin squares. Animals were assigned to squares by parity (3 multiparous and 1 primiparous squares with primiparous in the incomplete square). The 4 diets were designed to provide 0, 500, 1,000, and 1,500 g of PALM per day. Cows were fed individually with feed intake measured daily. Each period lasted 16 d with milk production and composition determined the final 2 d. Milk production, milk composition and feed intake data were analyzed using the MIXED procedure of SAS. Milk yields were 30.9, 34.0, 34.2, and 34.2 kg/ d (SEM = 1.9) for the 0, 500, 1,000, and 1,500 g levels, respectively. Milk yield was increased by the addition of PALM; however, there were no differences among the levels of PALM. Milk fat percentage was also increased from 3.44% for 0 g to 3.95% (SEM = 0.17) across all levels of PALM but there were no differences among the PALM treatments. Dry matter intakes were 23.3, 26.4, 24.7, and 23.8 kg/d (SEM = 1.4) for the 0, 500, 1,000 and 1,500 g levels, respectively. The addition of PALM increased milk yield and milk fat percentage, and no adverse effects on dry matter intake were observed.
authors.affiliation: University of Idaho, Department of Animal and Veterinary Science, Moscow 83844, USA.
authors.forename: S A
authors.initials: SA
authors.lastname: Mosley
authors.forename: E E
authors.initials: EE
authors.lastname: Mosley
authors.forename: B
authors.initials: B
authors.lastname: Hatch
authors.forename: J I
authors.initials: JI
authors.lastname: Szasz
authors.forename: A
authors.initials: A
authors.lastname: Corato
authors.forename: N
authors.initials: N
authors.lastname: Zacharias
authors.forename: D
authors.initials: D
authors.lastname: Howes
authors.forename: M A
authors.initials: MA
authors.lastname: McGuire
mesh_terms: D000818:Animals; D002417:Cattle / Q000502:physiology*; D004435:Eating / Q000502:physiology*; D005227:Fatty Acids / Q000008:administration & dosage* / Q000032:analysis; D005229:Fatty Acids, Monounsaturated / Q000032:analysis; D005231:Fatty Acids, Unsaturated / Q000032:analysis; D005260:Female; D007774:Lactation / Q000502:physiology*; D044243:Linoleic Acids, Conjugated / Q000032:analysis; D008892:Milk / Q000737:chemistry; D019301:Oleic Acid / Q000032:analysis; D000073878:Palm Oil; D019308:Palmitic Acid / Q000032:analysis; D010938:Plant Oils / Q000008:administration & dosage* / Q000032:analysis / Q000737:chemistry; D013229:Stearic Acids / Q000032:analysis; D017962:alpha-Linolenic Acid / Q000032:analysis
chemical_list: D005227:Fatty Acids; D005229:Fatty Acids, Monounsaturated; D005231:Fatty Acids, Unsaturated; D044243:Linoleic Acids, Conjugated; D010938:Plant Oils; D013229:Stearic Acids; C503589:cis-9, trans-11-conjugated linoleic acid; D017962:alpha-Linolenic Acid; D019301:Oleic Acid; D019308:Palmitic Acid; C031183:stearic acid; D000073878:Palm Oil