Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/21668
Title: The effect of dietary supplementation of calcium pidolate with or without vitamin D metabolite on production performance and egg quality in commercial laying hens
Contributor(s): Al-Zahrani, Khalid Salem (author); Roberts, Julie R (supervisor); Iji, Paul (supervisor)
Conferred Date: 2016
Copyright Date: 2015
Open Access: Yes
Handle Link: https://hdl.handle.net/1959.11/21668
Abstract: Two experiments were conducted on commercial layer hens to study the effects of dietary supplementation with two levels of 25-hydroxycholecalciferol (25(OH)D₃) and two levels of calcium pidolate (with or without 25(OH)D₃) on production performance and egg quality. Experiment 1 was conducted using 90 Hy-Line Brown layer hens from 19 to 80 weeks of age and commenced in November 2012. Birds were divided into three groups of 30 hens as follows: group A (control group) fed with normal commercial layer mash feed, and groups B and C (treated groups) fed with normal commercial layer mash feed plus 0.5 g of 25(OH)D3 [premix (68.9 μg 25(OH)D₃)] per kg of feed and 1 g of 25(OH)D₃ [premix (137.8 μg 25(OH)D₃)] per kg of feed, respectively. Experiment 2 was conducted using 147 Lohmann Brown layer hens from 21 to 80 weeks of age and commenced in March 2014.
Publication Type: Thesis Doctoral
Field of Research Codes: 070204 Animal Nutrition
070203 Animal Management
070206 Animal Reproduction
Rights Statement: Copyright 2015 - Khalid Salem Al-Zahrani
HERDC Category Description: T2 Thesis - Doctorate by Research
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