45Calcium dynamics of hens laying thick- or thin-shelled eggs
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چکیده
منابع مشابه
Influence of dried tomato pomace as an alternative to wheat bran in maize or wheat based diets, on the performance of laying hens and traits of produced eggs
In a 2 3 2 factorial arrangement, 144, fifty–four-week-old laying hens, in 12 treatments with 12 replicates for each treatment, received one of 12 diets based on maize or wheat containing three levels of dried tomato pomace (DTP: 0, 50 and 100 g/kg) as a substitute for wheat bran, and two levels of pigment (0 and 900 mg/kg), for 9 weeks. Weight gain (WG), egg production (EP), egg weight (EW...
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Both epidemiologic analyses and active disease surveillance confirm an ongoing strong association between human salmonellosis and the prevalence of Salmonella enterica subspecies enterica serovar Enteritidis in commercial egg flocks. The majority of human illnesses caused by this pathogen are attributed to the consumption of contaminated eggs. Animal welfare concerns have increasingly influence...
متن کاملCalcium and phosphorus dynamics in commercial laying hens housed in conventional or enriched cage systems.
Calcium (Ca) and phosphorus (P) dynamics in Shaver White hens (19-63 wk of age) were compared between enriched (EC) and conventional cage (CC) systems. Calcium and P intake and their levels in egg components and excreta were considered. Using commercial levels of production (4,836 hens), 10 test cages/system (24 hens/test cage) were used as replicate units. Enriched cages provided a nesting are...
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The objective of this study was conducted to evaluate the effects of nettle on performance, egg quality, blood biochemical and immunity parameters of laying hens. This study was carried out with 300 of Hyline (W36) hens in 5 treatment groups, 3 repetitions and 20 hens for each group. The groups were T1) Control group, T2, T3, T4, and T5 0.75%, 1%, 1.5%, and 2% nettle powder respectively. As com...
متن کاملPharmacokinetics of veterinary drugs in laying hens and residues in eggs: a review of the literature.
Poultry treated with pharmaceutical products can produce eggs contaminated with drug residues. Such residues could pose a risk to consumer health. The following is a review of the information available in the literature regarding drug pharmacokinetics in laying hens, and the deposition of drugs into eggs of poultry species, primarily chickens. The available data suggest that, when administered ...
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ژورنال
عنوان ژورنال: Canadian Journal of Animal Science
سال: 1994
ISSN: 0008-3984,1918-1825
DOI: 10.4141/cjas94-075