Strategies to Decrease Incidence of Fatty Liver in Dairy Cows

dry cow;transition;fatty liver;feeding

Richards, Bruce F.

关键词: dry cow;    transition;    fatty liver;    feeding;   

Others  :  https://www.ideals.illinois.edu/bitstream/handle/2142/24339/Richards_Bruce.pdf?sequence=1&isAllowed=y

美国|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

Holstein cows were used to explore aspects of dietary strategies to decrease lipid accumulation in the liver after parturition.In experiment 1, 75 cows (30 primiparous) were fed controlled-energy, high-forage (CEHF) diets or were overfed energy (OVERFED) from dry-off to parturition, or CEHF for the first 40 d after dry-off, followed by OVERFED for the last approximately 20 d before parturition (2-stage).During the periparturient period, cows fed CEHF had lower lipid accumulation in the liver than OVERFED cows and there was no advantage to using the 2-stage feeding strategy.In experiment 2, 16 cannulated mulitparous cows were assigned to one of 4 feeding combinations.Cows were fed CEHF throughout the entire dry period or fed with a 2-stage dietary strategy.Half of each group of cows (CEHF or 2-stage) were fed a diet with monensin added; whereas, the other half were fed a diet without monensin.Monensin tended to modulate rumen fermentation, particularly in cows fed the 2-stage diet strategy.Supplemental monensin increased milk production and had neutral or positive effects on rumen fermentation and rumen dynamics.Neither the higher energy closeup diet in the 2-stage strategy nor monensin supplementation affected ruminal papillae length.In these experiments, there were few advantages demonstrated for the 2-stage strategy compared with the single-group CEHF strategy during the dry period.