title: Milk production, peripartal liver triglyceride concentration and plasma metabolites of dairy cows fed diets supplemented with calcium soaps or hydrogenated triglycerides of palm oil.
abstract: The aim of the study was to test the effect of rumen-inert fat supplements of different chemical forms or containing different unsaturated/saturated (U/S) fatty acid contents on milk production, milk composition and liver and blood metabolic variables of high-yielding dairy cows in the peripartal period. Thirty Holstein-Friesian dairy cows were divided into three equal groups and fed a corn silage-based diet, without fat supplementation (control) or supplemented with 11.75 MJ NEl per day of calcium soaps of palm oil fatty acids (CAS; U/S=61/39) or with 11.75 MJ NEl per day of hydrogenated palm oil triglyceride (HTG; U/S=6/94). Each diet was fed from 25+/-2 d prior to the expected calving to 100+/-5 d post partum. Compared with the control, both CAS and HTG supplementation resulted in an increase of the average milk yield. Milk fat content and fat-corrected milk yield were higher in the HTG group but lower in the CAS group than in the control group. In all groups liver triglyceride concentrations (TGL) increased from 15 d prepartum to 5 d post partum, and then decreased thereafter. At 5 d TGL was lower in the HTG group than control or CAS cows. No significant differences were detected in TGL among dietary treatments at 15 d prepartum and 25 d post partum. Higher plasma glucose and insulin and lower non-esterified fatty acids and beta-hydroxybutyrate concentrations and aspartate aminotransferase activity were measured in the HTG group than in the control or CAS groups at 5 d or 25 d post partum. Our results show that HTG may provide a better energy supply for high-yielding dairy cows in negative energy balance than CAS around calving.
authors.affiliation: Department of Animal Science and Production, Georgikon Faculty, University of Pannonia, H-8360 Keszthely, Deák F. u. 16, Hungary.
authors.forename: Roland G
authors.initials: RG
authors.lastname: Karcagi
authors.forename: Tibor
authors.initials: T
authors.lastname: Gaál
authors.forename: Piroska
authors.initials: P
authors.lastname: Ribiczey
authors.forename: Gyula
authors.initials: G
authors.lastname: Huszenicza
authors.forename: Ferenc
authors.initials: F
authors.lastname: Husvéth
mesh_terms: D020155:3-Hydroxybutyric Acid / Q000097:blood; D000818:Animals; D001219:Aspartate Aminotransferases / Q000097:blood; D001786:Blood Glucose / Q000378:metabolism; D002136:Calcium, Dietary / Q000008:administration & dosage*; D002417:Cattle / Q000502:physiology*; D003612:Dairying; D019587:Dietary Supplements; D004734:Energy Metabolism / Q000502:physiology*; D005230:Fatty Acids, Nonesterified / Q000097:blood; D005231:Fatty Acids, Unsaturated / Q000008:administration & dosage*; D005260:Female; D007328:Insulin / Q000097:blood; D007774:Lactation / Q000502:physiology*; D008099:Liver / Q000378:metabolism*; D008892:Milk / Q000737:chemistry*; D000073878:Palm Oil; D036801:Parturition; D010938:Plant Oils; D011247:Pregnancy; D039401:Prenatal Nutritional Physiological Phenomena / Q000502:physiology*; D012820:Silage; D014280:Triglycerides / Q000008:administration & dosage / Q000378:metabolism; D003313:Zea mays
chemical_list: D001786:Blood Glucose; D002136:Calcium, Dietary; D005230:Fatty Acids, Nonesterified; D005231:Fatty Acids, Unsaturated; D007328:Insulin; D010938:Plant Oils; D014280:Triglycerides; D000073878:Palm Oil; D001219:Aspartate Aminotransferases; D020155:3-Hydroxybutyric Acid