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Nutrition during the dry period and hepatic lipid metabolism of periparturient dairy cows.
J Dairy Sci. 1996 Oct; 79(10):1850-64.JD

Abstract

From dry-off until 7 d before expected parturition date, 30 Holstein cows were fed a low energy diet (control) to maintain body condition or high energy diets (high fat or isocaloric high grain) to attempt to increase body condition. After parturition, all cows were fed a common lactation diet. Body condition was unchanged for cows fed control or high grain diets, but was decreased for cows fed the high fat diet because DMI was decreased. Cows fed the high fat diet during the dry period had decreased triglyceride accumulation in the liver at 1 d postpartum, which was accompanied by lowered plasma NEFA, increased peroxisomal beta-oxidation of palmitate by liver homogenates, and decreased esterification of palmitate by liver slices. During the last 3 wk prepartum, cows fed the high fat diet had lower glycogen and higher acid-soluble carnitine in liver, higher concentrations of NEFA and bST in plasma, higher ratio of triiodothyronine to thyroxine in plasma, and lower concentrations of insulin and thyroxine in plasma than did cows fed the high grain diet. After parturition, cows fed the high fat diet during the dry period had decreased percentage and production of milk fat; differences among treatments were not significant for DMI, body condition, milk production, or milk protein. Periparturient lipid metabolism was altered significantly in cows fed a high fat diet during the dry period, although diet composition and nutrient intakes were confounded.

Authors+Show Affiliations

Department of Animal Sciences, University of Illinois, Urbana 61801, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

8923256

Citation

Grum, D E., et al. "Nutrition During the Dry Period and Hepatic Lipid Metabolism of Periparturient Dairy Cows." Journal of Dairy Science, vol. 79, no. 10, 1996, pp. 1850-64.
Grum DE, Drackley JK, Younker RS, et al. Nutrition during the dry period and hepatic lipid metabolism of periparturient dairy cows. J Dairy Sci. 1996;79(10):1850-64.
Grum, D. E., Drackley, J. K., Younker, R. S., LaCount, D. W., & Veenhuizen, J. J. (1996). Nutrition during the dry period and hepatic lipid metabolism of periparturient dairy cows. Journal of Dairy Science, 79(10), 1850-64.
Grum DE, et al. Nutrition During the Dry Period and Hepatic Lipid Metabolism of Periparturient Dairy Cows. J Dairy Sci. 1996;79(10):1850-64. PubMed PMID: 8923256.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Nutrition during the dry period and hepatic lipid metabolism of periparturient dairy cows. AU - Grum,D E, AU - Drackley,J K, AU - Younker,R S, AU - LaCount,D W, AU - Veenhuizen,J J, PY - 1996/10/1/pubmed PY - 1996/10/1/medline PY - 1996/10/1/entrez SP - 1850 EP - 64 JF - Journal of dairy science JO - J Dairy Sci VL - 79 IS - 10 N2 - From dry-off until 7 d before expected parturition date, 30 Holstein cows were fed a low energy diet (control) to maintain body condition or high energy diets (high fat or isocaloric high grain) to attempt to increase body condition. After parturition, all cows were fed a common lactation diet. Body condition was unchanged for cows fed control or high grain diets, but was decreased for cows fed the high fat diet because DMI was decreased. Cows fed the high fat diet during the dry period had decreased triglyceride accumulation in the liver at 1 d postpartum, which was accompanied by lowered plasma NEFA, increased peroxisomal beta-oxidation of palmitate by liver homogenates, and decreased esterification of palmitate by liver slices. During the last 3 wk prepartum, cows fed the high fat diet had lower glycogen and higher acid-soluble carnitine in liver, higher concentrations of NEFA and bST in plasma, higher ratio of triiodothyronine to thyroxine in plasma, and lower concentrations of insulin and thyroxine in plasma than did cows fed the high grain diet. After parturition, cows fed the high fat diet during the dry period had decreased percentage and production of milk fat; differences among treatments were not significant for DMI, body condition, milk production, or milk protein. Periparturient lipid metabolism was altered significantly in cows fed a high fat diet during the dry period, although diet composition and nutrient intakes were confounded. SN - 0022-0302 UR - https://www.unboundmedicine.com/medline/citation/8923256/Nutrition_during_the_dry_period_and_hepatic_lipid_metabolism_of_periparturient_dairy_cows_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0022-0302(96)76553-0 DB - PRIME DP - Unbound Medicine ER -