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Oral and Poster Abstracts

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An experiment was conducted to study the influence of calcium<br />

soaps (CAS) or triglyceride (HTG) of hydrogenated palm oil on liver<br />

<strong>and</strong> blood parameters indicating the energy status <strong>and</strong> lipid<br />

metabolism of cows in the peripartum period. Holstein-Friesian<br />

dairy cows were fed on a corn-silage based diet supplemented with<br />

11.75 MJ NEL per day of CAS or HTG or without fat<br />

supplementation (control) in a period from d 21+3 prior to the<br />

expected calving to d 100+5 postpartum. At d 21+2 (basal sample)<br />

<strong>and</strong> d 15+2 prepartum <strong>and</strong> d 5+2, 25+3 postpartum liver biopsy <strong>and</strong><br />

blood samples <strong>and</strong> at d 100+5 postpartum an additional blood<br />

sample were collected from the cows. Total lipid (TL), glycogen<br />

(GL) content, fatty acid composition of liver lipids <strong>and</strong> glucose<br />

(GLU), insulin (INS), free fatty acid (NEFA), beta hydroxy butirate<br />

(BHBA), triglyceride (TG), cholesterol (Ch), aspartat-aminotransferase<br />

(AST) contents from the blood were determined. No<br />

differences were detected in the liver fat among the groups at d 14<br />

prepartum or d 25 postpartum. At d 5 postpartum, however, both<br />

control <strong>and</strong> CAS-cows had higher TL <strong>and</strong> lower GL concentrations<br />

in the liver than HTG-cows (P

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