sixty eight holstein cows, 38 primiparous and 30 multiparous ones, were employed in a randomized complete block design, blocked to evaluate the effects of 2 diets in various ruminal fermentable carbohydrate sources (ground corn vs rolled wheat) on rumen fermentation and performance during preparturient period. primiparous and multiparous cows were blocked by parity. the cows were fed diets as t...

BACKGROUND The supplementation of fat to lactating dairy cows has long been used as a management tool to increase dietary energy density for improving cow production, reproduction and to alleviate negative energy balance. Attempts have been made to investigate the effect of canola meal on plasma metabolites in lactating cows, but the results have been diverse and inconsistent. To our current kn...

sixty eight holstein cows, 38 primiparous and 30 multiparous, were employed in a randomized complete block design to evaluate the effects of 2 diets of varied rumine fermentable carbohydrate sources (corn grain (cg) and wheat grain (wg)) on blood metabolites and hormones during periparturint period. primiparous and multiparous cows were blocked by parity. the cows were fed diets as total mixed ...

During marketing, cattle may be exposed to periods of water deprivation. The impact of water and feed access and health status on the physiological well-being and carcass characteristics of Holstein slaughter cows during preslaughter marketing was studied through analysis of serum components, BW loss percentage, and fresh meat composition. Ninety-one multiparous Holstein cows (609 ± 89 kg mean ...

the aim of this experiment was evaluating effect of fish oil versus palm oil on mammary gland health and milk production in holstein cows. ten multiparous holstein cows were used from six week before up to 63 days after parturition. feed intake and milk production were recorded daily, milk composition, body weight and body condition score were measured weekly and blood metabolites were determin...

Reduced-fat dried distillers’ grains with solubles (RF-DDGSs) are co-products of ethanol production and contain less fat than traditional grains. The in corn is ~91% unsaturated, it toxic to rumen microorganisms so could influence the composition microbiome. It has been demonstrated that RF-DDGS a suitable ration ingredient support high-producing dairy cow, this feedstuff promising alternative ...

This experiment was conducted to determine the influences of supplementing different levels of an additive containing lutein in the diet of Chinese Holstein lactating cows on production performance, antioxidative plasma metabolites, and milk quality. This study was performed on 60 multiparous Holstein dairy cows in peak lactation. The cows were randomly allocated to 1 of 4 homogeneous treatment...

The objective was to evaluate the effects of feeding level (FL) and milking frequency (MF) in early lactation on milk production in grazing dairy cattle. Multiparous Holstein-Friesian cows (n = 120; ~31 DIM) offered an unrestricted allowance of fresh pasture (UnRes) and milked twice daily (2X) were randomly assigned to one of 4 treatments for 21 d in a 2 by 2 factorial arrangement 2 FL of pastu...

Twenty four primiparous and multiparous Holstein cows on early lactation, beginning five weeks postpartum, were used for four weeks to investigate the effects of supplemention of rumen-protected choline (RPC) or vitamin E on milk yield, milk composition, dry matter intake, body condition score and body weight. The cows were randomly assigned to one of the following treatments: I)no supplement (...

BACKGROUND Iodine is a vital component of the thyroid hormones and is required for normal growth, development, and tissue metabolism in humans and animals. OBJECTIVES This study for the first time compares the effects of heating during pasteurization and sterilization on the iodine concentration of milk for an adequate provision of dietary iodine. MATERIALS AND METHODS This study was carrie...