2012/09/24 by Fatih Akdemir, F. Akdemir, Cemal Orhan +7 · 1 citation
Agricultural and Biological Sciences · Medicine · #Animal Nutrition and Physiology #Antioxidant Activity and Oxidative Stress #Phytochemicals and Antioxidant Activities
paper · doi:10.1080/00071668.2012.729142
openalex publication_date 2012/09/24 · crossref created 2012/09/24 · crossref issued 2012/10/01 · crossref published 2012/10/01 · crossref published-print 2012/10/01 · crossref deposited 2019/07/04 · openalex created_date 2025/10/10 · crossref indexed 2026/07/29 · openalex updated_date 2026/07/30
1. The effects of tomato powder supplementation on performance, egg quality, serum and egg yolk carotenoids, vitamins and malondialdehyde (MDA) concentrations in were investigated in laying hens in mid-lay. 2. A total of 90 laying hens, 49 weeks old, were divided into 3 groups consisting of 6 replicate cages, 5 birds per cage. Birds were randomly fed on one of three diets: basal diet and basal diet added with 5 or 10 g tomato powder per kg diet. 3. As tomato powder concentration increased, there were linear increases in feed intake, egg production, egg weight and yolk colour and a linear decrease in feed conversion. Shell weight, shell thickness and Haugh unit remained unchanged in response to dietary treatments. 4. Concentrations of serum and egg yolk lycopene, β-carotene, lutein and vitamin A increased for both diets including tomato powder, whereas MDA decreased linearly with increasing supplemental tomato powder concentration. 5. Tomato powder supplementation increased egg production persistency and increased carotenoids and vitamin A contents in egg yolk, accompanied by reduced yolk lipid peroxidation.