Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/20162
Title: The Effect of Dietary Supplementation with Calcium Pidolate and 25-Hydroxycholecal Ciferol on Egg Quality in Commercial Laying Hens
Contributor(s): Al-Zahrani, K (author); Roberts, Julie R  (author)
Publication Date: 2016
Open Access: Yes
Handle Link: https://hdl.handle.net/1959.11/20162
Open Access Link: http://sydney.edu.au/vetscience/apss/documents/2016/APSS%202016%20Proceedings%20Final.pdfOpen Access Link
Abstract: Seven groups from a total of 147 Lohmann Brown laying hens were housed individually in cages from 21 to 80 weeks of age. Birds were divided into a control group and groups receiving layer mash formulated to commercial standards supplemented with either a single or double dose of supplemental calcium pidolate, with or without supplemental Hy-D at either a single or double dose. Egg quality was measured as shell quality, internal quality, shell colour and cuticle coverage. There was a significant main effect of hen age and treatment group on albumen height, Haugh unit, and yolk colour score. There was a significant main effect of hen age and treatment group on egg weight, eggshell weight, percentage shell, shell breaking strength, shell deformation, shell thickness, shell reflectivity before staining, a* after staining, difference in a* before and after staining, and cuticle single score value. There was a significant main effect only of hen age on translucency score. A significant interaction between hen age and treatment group was found for yolk colour score, shell weight, shell reflectivity, a* after staining, difference in a* before and after staining, and cuticle single score value. The results indicated that, with increasing hen age, there was a decrease in albumen height, Haugh unit, percentage shell, shell breaking strength, shell deformation and shell thickness. Yolk colour score and translucency score increased with increasing hen age The effect of treatment group on the measured variables was inconsistent although the addition of Hy-D appeared to have greater effects than the addition of calcium pidolate.
Publication Type: Conference Publication
Conference Details: 27th Annual Australian Poultry Science Symposium, Sydney, Australia, 14th - 17th February, 2016
Source of Publication: Proceedings of the 27th Annual Australian Poultry Science Symposium, p. 141-144
Publisher: Poultry Research Foundation, University of Sydney
Place of Publication: Sydney, Australia
ISSN: 1034-6260
Field of Research (FoR) 2008: 070206 Animal Reproduction
Field of Research (FoR) 2020: 300305 Animal reproduction and breeding
Socio-Economic Objective (SEO) 2008: 830501 Eggs
Socio-Economic Objective (SEO) 2020: 100601 Eggs
Peer Reviewed: Yes
HERDC Category Description: E1 Refereed Scholarly Conference Publication
Other Links: http://sydney.edu.au/vetscience/apss/proceed.shtml
Series Name: Australian Poultry Science Symposium Proceedings
Series Number : 27
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