ative to calving, and twice weekly postpartum. Plasma were analyzed for triglycerides (TG), total cholesterol, lipoprotein cholesterol and fatty acids. Changes in plasma lipid concentrations during the periparturient period were characterized for the first time. Plasma lipid concentrations were not affected by feeding rumen-protected choline. Cows fed SB beginning at 28 days prepartum had highe...

Background: Feeding unsaturated fatty acids sources in dairy cows is considered as a strategy to improve animal health during postpartum period and milk fatty acid profile. OBJECTIVES: This study aimed to investigate the effects of conjugated linoleic acid supplement and combination of sesame meal and oil on performance and milk fatty acid composition of dairy cows during transition period. MET...

Cows experience a significant negative protein balance during the first 30 d of lactation. Given functional effects AA on health, especially in challenging periods such as calving, higher levels and specific diet may act to improve health feed intake. The response dairy cows 3 supplementation strategies transition period through 45 milk was evaluated. final data set had 39 Holstein blocked base...

The timing and magnitude of metabolic adaptations in adipose tissue during lactogenesis and lactation were determined in first lactation bovines. In vitro rates of lipogenesis and palmitate esterification were measured to estimate in vivo synthesis. Lipolysis was measured in the basal state and as maximally stimulated by norepinephrine or epinephrine to estimate physiological adaptations as wel...

Cashew nut shell extract (CNSE) is a byproduct of the cashew industry containing bioactive compounds that alter rumen fermentation patterns. Therefore, study objectives were to evaluate effects CNSE (59% anacardic acid and 18% cardol) on production, variables, metabolism, inflammation in transition dairy cows. Fifty-one multiparous Holstein cows used randomized design assigned treatment based t...

The concentration of plasma progesterone, oestradiol-17 beta, oestrone sulphate, corticosteroids and 13,14-dihydro-15-ketoprostaglandin F2 alpha (PGFM) was measured in 12 buffalo cows during the whole period of gestation, around parturition and for 15 d postpartum. The concentration of progesterone and oestradiol-17 beta increased slightly during the first 2 months (3.5 +/- ng/ml) and 4 months ...

The aim of the present study was to examine the effect of the somatic cell count (SCC) in milk on reproductive performance, such as pregnancy status in the prepartum period and ovarian function in the postpartum period, in dairy cows. Blood samples were collected every week from one month prepartum to parturition in order to measure the concentrations of 13,14-dihydro-15-keto-PGF2α (PGFM), estr...

Because of low feed intake during the first weeks lactation, dietary concentration metabolizable protein (MP) must be elevated. We evaluated effects providing additional rumen-undegradable (RUP) from a single source or blend and AA sources 3 wk lactation. also whether replacing forage fiber (fNDF) nonforage with affected responses. In randomized block design, at approximately 2 prepartum, 40 pr...

We investigated how prepartal body condition score (BCS) alters key hepatic enzymes associated with 1-carbon, carnitine, and glutathione metabolism the related biomarkers in liver tissue plasma of periparturient dairy cows. Twenty-six multiparous Holstein cows were retrospectively selected according to BCS at 4 wk prepartum divided into high (HighBCS, ≥ 3.50) normal (NormBCS, ≤ 3.25) groups (n ...

A common feeding practice during the dry period is to switch dairy cows to an energy-dense diet 3 wk prepartum, but this practice may lead to the overconsumption of energy and increase the risk of metabolic disease postpartum. The aim of this trial was to compare the metabolic status of transition Holstein dairy cows fed a 77% forage diet (77F; NEl = 1.46 Mcal/kg; NDF = 41%) vs. those fed an 87...