The maintenance energy required to sustain the cow herd is a major cost of beef production. This work proposes modifying parameter estimates for a population-specific lactation curve with genetic evaluations for the maternal genetic effect on calf gain from birth to weaning to provide inputs for a commonly used prediction of energy requirement. Daily milk production (y) was modeled as a functio...

This experiment was conducted on 60 Hanwoo calves comprising five feed additive groups, with 12 calves in each group, to determine the effects of additives at preand post-weaning on growth performance and blood profile. The groups were control, antibiotic (Neomycin 110 ppm), illite (2%), fermented green tea probiotics (FGTP, 0.5%), and mixed additives (FGTP 0.25%, illite 1% and licorice 0.1%). ...

Allowing the dam to rear her calf is an alternative practice in dairy industry where cow and may gain welfare benefits from performing natural highly motivated behaviors. However, this system has been linked increased separation weaning response. Reducing daily dam-calf-contact time be a way prepare for separation. The first aim of present study was investigate effect 8 weeks half-day on calves...

Data consisting of 948 calf records collected from 1978 to 1982 were analyzed to determine the effects of breeding methods used to improve commercial herds genetically on birth and weaning traits. Four distinct groups were used in the project: Group 1 (G1), an unselected, random mating Hereford control line; Group 2 (G2), a Hereford group using sires selected for yearling growth; Group 3 (G3), ...

A 2 × 2 factorial experiment (n = 12 replicates per treatment, 4 pigs per replicate) was performed to investigate the effects of seaweed extracts, laminarin (derived ß-glucans) and fucoidan (sulphated polysaccharides), independently or in combination on post-weaning piglet performance and selected microbial populations. At weaning, the piglets (24 days of age, 6.4 kg live weight) were assigned ...

S a part of the record of performance studies with Milking Shorthorn steers at the U.S.D.A. Research Center, Beltsville, Maryland, various body measurements of the steers were taken on foot before slaughter. These body measurements were taken to determine whether there exists any association between the measures themselves and between them and certain performance characters. These relationships...

The present study investigated the effects of dietary supplementation of a seaweed extract (SWE) to sows and weaned pigs on post-weaning growth performance, intestinal morphology, intestinal microflora, volatile fatty acid concentrations and immune status of pigs at days 11 and 117 post-weaning. Gestating sows (n 20) were supplemented with a SWE (0 v. 10·0 g/d) from day 107 of gestation until w...

It is generally accepted that feed intake and growth (gain) are the most important economic components when calculating profitability in a growth test or feedlot. We developed a single post-weaning growth (feedlot) index based on the economic values of different components. Variance components, heritabilities and genetic correlations for and between initial weight (IW), final weight (FW), feed ...

Abstract The backgrounding period is a post-weaning management strategy to add weight and build the health status in beef calves. This phase used prepare calves enter next of production supply chain. Weaning methods can be strategies reduce calf morbidity mortality feedlot. objective this study was assess growth performance based on weaning subsequent using commonly forage-based diets by Alabam...