The effects of withdrawal of vitamin and trace mineral supplements from layer diets on egg yield and trace mineral composition

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dc.contributor.authorInal, F
dc.contributor.authorCoskun, B
dc.contributor.authorGulsen, N
dc.contributor.authorKurtoglu, V
dc.date.accessioned2020-03-26T16:37:29Z
dc.date.available2020-03-26T16:37:29Z
dc.date.issued2001
dc.departmentSelçuk Üniversitesien_US
dc.description.abstract1. This study was conducted as three trials. 2. In the first trial, zinc, manganese, copper and iron concentrations were determined in dietary raw materials collected from various regions of Turkey. 3. In the second trial, 200 Hisex Brown laying hens, 30 weeks of age, were divided into two groups. The first group served as controls and were fed on a standard commercial layer diet. The second group were fed on a commercial layer diet that was not supplemented with trace minerals and vitamins. Egg production, egg weight, specific gravity, food consumption and food efficiency of the birds in each group were determined. In the unsupplemented group, egg production (0.75 vs 0.83) and food intake (114 vs 122 g) were lower than the those of the control group (P<0.05). Food efficiency was 2.42 (kg food/ kg gain) in the group consuming the unsupplemented diet and 2.36 in the controls. 4. In the third trial, as in Trial 2, Hisex Brown laying hens, 62 weeks of age were used. In the unsupplemented group, the mean egg weight was significantly lower than that of controls (68.0 vs 69.6 g) (P<0.01). 5. At the end of the second and third trials, egg samples collected from experimental groups were hard boiled in water. The levels of zinc, manganese, copper and iron in the egg yolk were determined. The zinc level of the egg yolk from the control group of second trial was higher (23.5 mg/kg) than those of the unsupplemented group (13.6 mg/kg).en_US
dc.identifier.doi10.1080/713655024en_US
dc.identifier.endpage80en_US
dc.identifier.issn0007-1668en_US
dc.identifier.issue1en_US
dc.identifier.pmid11337972en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage77en_US
dc.identifier.urihttps://dx.doi.org/10.1080/713655024
dc.identifier.urihttps://hdl.handle.net/20.500.12395/17630
dc.identifier.volume42en_US
dc.identifier.wosWOS:000168124600009en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.language.isoenen_US
dc.publisherCARFAX PUBLISHINGen_US
dc.relation.ispartofBRITISH POULTRY SCIENCEen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.selcuk20240510_oaigen_US
dc.titleThe effects of withdrawal of vitamin and trace mineral supplements from layer diets on egg yield and trace mineral compositionen_US
dc.typeArticleen_US

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