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Higher postpartum hepatic triacylgylcerol concentrations in dairy cows with free rather than restricted access to feed during the dry period are associated with lower activities of hepatic glycerolphosphate acyltransferase

Fatty liver development in periparturient dairy cows (Reid 1980) is associated with impaired health, fertility and production (Morrow et al. 1979, Reid and Roberts 1983). Fatty liver, i.e., accumulation of triacylglycerols, may develop after liberal feeding during the final phase of the lactation and the dry period (Fronk et al. 1980, Johannsen et al. 1988, Reid et al. 1986). Overconditioned cows, when compared with normal cows, have less appetite at calving (Bines and Morant 1983, Garnsworthy and Topps 1982), which, in combination with the high energy need for the onset of milk production, results in a greater negative energy balance. As a result, the overconditioned cows mobilize more fat ...

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