PROTEIN LEVELS IN UREA-SUPPLEMENTED STARTER RATIONS FOR YOUNG CALVES

Milk-protein substitutes in rations for veal calves.

Only small numbers of calves were fattened on whole milk alone, both in western Europe and Great Britain, until the 1960’s, d-hen suitable milk-substitute diets were developed. The lorn iron content of milk made calves anaemic (Blaxter, Sharman & MacDonald, ‘957) and lowered the myoglobin content of the muscle tissues. This resulted in white meat. In the course of time this whiteness bccame a m...

Digestion criteria in nursing beef calves supplemented with limited levels of protein and energy.

This study was conducted with grazing nursing calves (197 kg) to determine the effects of 1) limiting creep feed intake and 2) increasing the concentration of ruminal escape CP in creep feed at a limited level of creep feed intake on fescue and milk intake, ruminal NDF digestion, and total tract digestibility in calves fed high-quality, freshly harvested fescue. The treatments were 1) control (...

A Comparison of Certain Antibiotics in Several Chick Starter Rations

Effects of Feeding Different Levels of Flaxseed on Performance, Nutrient Digestibility and Blood Parameters of Pre-Weaning Calves

   In this experiment, we used 15 newborn Holstein male calves that their initial weight was 41 ± 4.5 kg and their age was one week. The experiment was conducted in a completely randomized design with three treatments and five replications. Treatments included: 1- control treatment without flaxseed, 2- treatment containing 5% flaxseed and 3- treatment containing10% flaxseed. Flaxseed replaced ...

Effects of Starter Protein Levels and Amounts of Milk Fed on Animal Health and Rumen Microbiota Changes in Holstein Male Calves

The aim of this study was to investigate the effect of two different levels of starter protein and amounts of milk fed on animal health, fecal score, immune responses and microbial population in the rumen of Holstein male calves. Two levels of starter crude protein (17 and 20% of starter dry matter (DM) and two levels of milk fed (7 and 10% of body weight) were combined in a 2 × 2 factorial exp...