Effects of propylene glycol or fat drench on plasma metabolites, liver composition, and production of dairy cows during the periparturient period.

摘要: Forty-eight Holstein cows were used to determine the effects of short-term oral drenches propylene glycol (PG) and Ca-soaps palm oil fatty acids (fat) on plasma concentrations key metabolites, liver composition, milk production during first 3 wk lactation. Treatments (2 x 2 factorial arrangement) given orally once daily for d postpartum water (control), 500 ml PG, 454 g fat, or PG plus fat. All treatments administered as a total volume 1.9 L. Administration decreased nonesterified (NEFA) in 7 21 tended decrease beta-hydroxybutyrate postpartum. Concentrations insulin not affected by treatment. either fat increased glucose glycogen compared control treatments. triglycerides did affect dry matter intake yield composition postpartum; however, drenched with have lower Short-term drenching effectively NEFA early lactation; data do support administration via drench lactation concurrent dietary appears blunt metabolic response PG.