Growth, nutrient utilization, and body composition of dairy calves fed milk replacers containing different amounts of protein1

  title={Growth, nutrient utilization, and body composition of dairy calves fed milk replacers containing different amounts of protein1},
  author={R.M. Blome and James K Drackley and Floyd K. Mckeith and Michael F. Hutjens and G C Mccoy},
  journal={Journal of Animal Science},
  pages={1641 - 1655}
Abstract Male Holstein calves <1 wk of age were allowed a 2-wk adaptation period after purchase, and then were blocked by BW and assigned randomly within block to either a baseline slaughter group or one of four experimental groups (n = 8 to 9 per group). Treatments were isocaloric milk replacers (12.5% solids) fed at 12% of BW that contained 16.1, 18.5, 22.9, or 25.8% CP (DM basis) from whey protein sources. After a 6-wk feeding period, all calves were slaughtered and the weights and chemical… 

Growth and body composition of dairy calves fed milk replacers containing different amounts of protein at two feeding rates.

Interactions (P < 0.05) of feeding rate and CP concentration for gains of water and protein indicated that when dietary CP was 26% the ME supply limited protein use by calves fed at 1.25% of BW daily.

Effects of fat concentration of a high-protein milk replacer on calf performance.

Preweaning apparent digestibility of DM, organic matter, fat, nonfiber carbohydrates, Ca, and P and serum amylase concentration were linearly reduced as fat increased from 14 to 23%, and preweaning starter intake responded quadratically to fat, being lowest at 14 and 23% fat.

Nitrogen utilization, preweaning nutrient digestibility, and growth effects of Holstein dairy calves fed 2 amounts of a moderately high protein or conventional milk replacer

Feeding >0.66kg (DM) from a 26% CP MR increased ADG and improved feed efficiency during the preweaning period but reduced starter intake and lowered N efficiency, which could be due to MOD- and AGG-fed calves having greater urine volume and thereby, greater combined urine N output.

Intensive liquid feeding of dairy calves with a medium crude protein milk replacer: Effects on performance, rumen, and blood parameters.

Evaluating the effects of different liquid-feeding systems using a medium crude protein milk replacer on performance, rumen, and blood parameters in newborn Holstein calves found that Milk replacer and starter intake were inversely affected by feeding system.

Effects of Additional Milk Replacer Feeding on Calf Health, Growth, and Selected Blood Metabolites in Calves

Calves fed variable amount of milk replacer and exposed to immunological challenge before weaning had greater BW gain, but also increased incidence of diarrhea that required added veterinary treatments, which might be related to the calf's ability to identify pathogens in the environment.

Optimal concentrations of lysine, methionine, and threonine in milk replacers for calves less than five weeks of age.

The effect of supplementing milk replacers containing 24 to 28% crude protein and 17% fat with Lys, Met, and Thr to estimate the optimum requirements for calves less than 5 wk of age appeared optimum based on responses of body weight gain, feed efficiency, and serum concentrations of urea nitrogen.

Growth, Nutrient Utilization and Amino Acid Digestibility of Dairy Calves Fed Milk Replacers Containing Different Amounts of Protein in the Preruminant Period

It was concluded that calves fed with milk replacer containing 22% of protein had better growth performance and nutrient utilization as compared to animals treated with milk Replacer containing either 18% or 26% ofprotein.

Effects of dietary crude protein on protein and fat deposition in milk-fed veal calves.

The results provide a basis for estimating protein requirement of veal calves according to a factorial approach because the composition of body weight gain was affected differently for each stage, because the protein content of body Weight gain increased with increasing dietary CP content during the first stage, whereas it remained constant during the other 2 stages.

Effects of colostrum and milk replacer feeding rates on intake, growth, and digestibility in calves.

Over the first 2 mo of life, the calves feeding MRH consumed less calf starter than calves fed MRM, but average daily gain or hip width change did not differ, and the number of days calves were treated with veterinary medications was higher when calves were fed CR.

Effects of raw milk and starter feed on intake and body composition of Holstein × Gyr male calves up to 64 days of age.

Weight gain and N retention in calves up to 64 d of age increased with milk supply, however, greater levels of milk are also associated with reduced starter feed intake, in addition to increased body fat content.



Effects of dietary protein and energy on the growth of Friesian bull calves: II. Effects of level of feed intake and dietary protein content on body composition

In a 49-day comparative slaughter experiment with pre-ruminant calves, the effects of diets containing a range of protein : energy ratios and fed at two rates were examined relative to body

Composition of growth of Holstein calves fed milk replacer from birth to 105-kilogram body weight.

The composition ofgain observed was compared to predictions from the 1989 Dairy NRC and 1996 Beef NRC equations and demonstrated the equations do not represent the composition of gain in calves of this weight.

Effect of varying carbohydrate and fat content of milk replacer on body composition of Holstein bull calves.

It is demonstrated that, under isocaloric and isonitrogenous intake conditions, equivalent dietary energy from fat compared to carbohydrate, above 15% fat, has no beneficial purpose unless additional fat deposition is required in the animal.

Effects of dietary protein and energy on the growth of Friesian hull calves

Both protein and feeding levels markedly affected the gains of body weight, protein, and fat, but energy gains were affected by dietary protein content only at the low feeding level.

Nutrition of the milk-fed calf: I. Performance of calves fed on different levels of whole milk relative to body weight

During the first four weeks of life scours appeared to be microbial in nature, and after the eighth week of age were ... total live weight gain over the entire 14-week period rose with increasing level of intake.

Body composition studies with the milk-fed lamb. III. The effect of the protein and energy intake on the composition of the live-weight gain

When compared at the same empty body weight, the protein content of the fat-free body of lambs given diet C was significantly higher than that of lamBS given diet A, and this effect of dietary-protein concentration could not be explained by differences in the amounts of protein stored as wool.

Rumen development in the calf

Equations were developed from the results by which the weight of contents of the various parts of the alimentary tract, and hence empty body weight in the live animal, can be determined from a knowledge of the live weight and daily consumption of concentrates and hay.

Components of growth in Holstein heifers fed either alfalfa or corn silage diets to produce two daily gains.

Growth components were compared in an experiment with a 2 x 2 factorial design and the percentage of gut contents in daily BW gain was higher for heifers fed the alfalfa diet than for those fed the corn diet.

Influence of dietary protein and recombinant porcine somatotropin administration in young pigs: II. Accretion rates of protein, collagen, and fat.

Assessment of the effects of different dietary protein levels and recombinant porcine somatotropin (rpST) administration on deposition rates of protein, fat, water, ash, and collagen in pigs found an overall 66% increase in the utilization efficiency of dietary protein for empty body protein deposition.

Efficiency of food conversion and body composition of the preruminant lamb and the young pig

  • R. Hodge
  • Biology, Medicine
    British Journal of Nutrition
  • 1974
A 20% reduction in the voluntary intake of gross energy decreased daily protein deposition in the lambs only but decreased daily fat deposition in both species.