Results 281 to 290 of about 26,916 (317)
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Constant photoperiods and eggshell quality in broiler breeder pullets
British Poultry Science, 2005Broiler breeder pullets were exposed to constant 10-, 11-, 12-, 13-, 14- or 16-h photoperiods from 3 d of age. Egg weight, eggshell weight and shell thickness index were determined at 52 weeks of age. Egg weight increased by 0.31 g, shell weight decreased by 30 mg and shell thickness index decreased by 0.57 mg/cm2 for each one-hour increase in ...
D, Backhouse, P D, Lewis, R M, Gous
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Effects of natural zeolite (clinoptilolite) on eggshell quality
Proceedings of the British Society of Animal Science, 2005Using inorganic additives is one suggested approach for improvement of performance or for preventing some disorders and poisoning of farm animals. One of those which use in animal diets is zeolite. There are more than 40 types of natural zeolites, of which one of the commonest is Clinoptilolite.
M. Malecky, M. Shivazad, A. Nikkhah
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Effects of DDT on eggshell quality and calcium adenosine triphosphatase
Journal of Toxicology and Environmental Health, 1977Adult mallard ducks were fed a diet containing 50 ppm DDT for 6 months. Eggs laid during this period were collected and eggshell weight, thickness, and calcium were determined. Chronic ingestion of DDT resulted in production of eggshells that were significantly thinner and lighter than those of controls.
G J, Kolaja, D E, Hinton
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Influence of dietary osteolathyrogenson the eggshell quality of laying hens
British Poultry Science, 19981. Laying hens were fed osteolathyrogens, either semicarbazide hydrochloride at 0.3 or 0.4 g/kg or beta-aminopropionitrile fumarate at 0.5 or 0.6 g/kg diet to examine their effects on eggshell quality. 2. Shell quality characteristics considered for evaluation were shell surface area, shell thickness, shell weight, percentage shell, shape index and the
S D, Chowdhury, R H, Davis
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British Journal of Nutrition, 2019
Abstract The present study explored the mechanism of Zn-methionine (Zn-Met) influencing eggshell quality of laying hens and investigated whether the mechanism was related to Ca deposition. Hyline grey layers (n 384, 38 weeks old) were divided into four groups: 0 mg Zn/kg, 40, 80 mg Zn/kg as Zn-Met, and 80 mg Zn/kg as zinc sulphate (ZnSO4).
Lanlan Li +4 more
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Abstract The present study explored the mechanism of Zn-methionine (Zn-Met) influencing eggshell quality of laying hens and investigated whether the mechanism was related to Ca deposition. Hyline grey layers (n 384, 38 weeks old) were divided into four groups: 0 mg Zn/kg, 40, 80 mg Zn/kg as Zn-Met, and 80 mg Zn/kg as zinc sulphate (ZnSO4).
Lanlan Li +4 more
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Chitosan coating minimises eggshell breakage and improves egg quality
Journal of the Science of Food and Agriculture, 2007AbstractThe interior quality of eggs, shell impact strength, and consumer perception of eggs coated with chitosan containing an organic acid (acetic, lactic and propionic) were evaluated. Uncoated eggs had the highest albumen pH and lowest albumen viscosity.
CANER, CENGİZ, Cansiz, Oezge
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Eggshell quality in extended laying cycle
To improve sustainability of egg production, current practices in the table egg industry aim at lengthening the egg laying cycle of commercial hens from 70-80 to about 100 weeks of age. In such a context, the control of eggshell quality is the limiting factor of extension of the laying cycle rather than the egg production persistency itself. The aim ofGuyot, Nicolas +5 more
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Time to add screening for financial hardship as a quality measure?
Ca-A Cancer Journal for Clinicians, 2021Cathy J Bradley +2 more
exaly