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Journal ArticleDOI

Effect of Combined Vitamin C and Vitamin E Supplementation on Reproductive Performance and Hatching Rate in Japanese Laying Quail

TL;DR: In this paper , the effect of vitE supplementation in combination with vitC (Vitamin C) on reproductive performance and hatching rate of Japanese quail at the age of 59-114 days was evaluated.
Abstract: : This study was carried out to evaluate the effect of vitE (Vitamin E) supplementation in combination with vitC (Vitamin C) on reproductive performance and hatching rate of Japanese quail at the age of 59-114 days. A total of 132 laying quails were arranged in a completely randomized design with 3 treatments and 4 replicates, each replicate being 9 female quails and 2 male quails at 59 days of age. The experimental treatments were as follows: control fed the basal diet (KPCS), E125C75 including KPCS supplemented with 125 mg vitE/kg feed combined with 75 mg vitC/kg feed and E125C125 including KPCS supplemented 125 mg vitE/kg feed combined with 125 mg vitC/kg feed. Research results showed that the highest WG (Weight Gain) was in E125C125 (30.32 g) and lowest in E125C75 (17.37 g). There were no statistically significant differences between treatments in terms of laying rate, feed conversion ratio, egg mass and egg weight. However, hatching rate and bodyweight of quails at 1 day of age were significantly different between treatments, the highest was E125C125 (74.37% and 7.43 g), followed by E125C75 (70.02% and 7.03 g) and the lowest was control (65.89% and 6.82 g). It can be concluded that E125C125 not only improved laying rate but also increased hatching rate and bodyweight of quail chick.
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Journal ArticleDOI
24 Apr 2013-Animal
TL;DR: Further research is still needed to improve the knowledge of basic mechanisms associated to the negative effects of heat stress in poultry, as well as to develop effective interventions to deal with heat stress conditions.
Abstract: Understanding and controlling environmental conditions is crucial to successful poultry production and welfare. Heat stress is one of the most important environmental stressors challenging poultry production worldwide. The detrimental effects of heat stress on broilers and laying hens range from reduced growth and egg production to decreased poultry and egg quality and safety. Moreover, the negative impact of heat stress on poultry welfare has recently attracted increasing public awareness and concern. Much information has been published on the effects of heat stress on productivity and immune response in poultry. However, our knowledge of basic mechanisms associated to the reported effects, as well as related to poultry behavior and welfare under heat stress conditions is in fact scarce. Intervention strategies to deal with heat stress conditions have been the focus of many published studies. Nevertheless, effectiveness of most of the interventions has been variable or inconsistent. This review focuses on the scientific evidence available on the importance and impact of heat stress in poultry production, with emphasis on broilers and laying hens.

774 citations

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TL;DR: The diversity and depth of the body's antioxidant protection system is reviewed in this article, and new evidence suggests that β-carotene and tocopherol may act synergistically against lipid peroxidation, and that polyphenols such as flavonoids provide antioxidant protection which is enhanced by vitamin C.

424 citations

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TL;DR: It was concluded that ascorbic acid, particularly at 150 ppm, enhanced performance of broiler chicks exposed to multiple concurrent environmental stressors.

170 citations

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TL;DR: The results from this study demonstrated an enhanced antibody and macrophage response and suggest that in ovo exposure with VE may improve posthatch poult and broiler quality.

151 citations

Journal ArticleDOI
TL;DR: It is concluded that dietary supplementation with extra vitamin E can, at least in part, alleviate the adverse effects of chronic heat stress in laying hens, perhaps by maintaining the supply of egg precursors in plasma.
Abstract: 1. The effects of different dietary concentrations of vitamin E (alpha-tocopherol acetate) were investigated in 2 experiments on laying hens exposed to chronic heat stress at 32C. 2. In the first experiment, egg production and plasma concentrations of calcium and egg yolk precursors were measured in 24 hens before, during and after a stress period of one week and fed on diets containing 10 or 500 mg vitamin E/kg. 3. In the second, larger experiment, egg production and food intake were measured in 300 hens housed in 2 temperature-controlled rooms and fed on diets containing 10, 125 or 500 mg vitamin E/kg. Birds in room 1 were stressed from 24 to 28 weeks of age and those in room 2 from 32 to 36 weeks. 4. In experiment 1, egg production and egg weight were significantly higher (72.6 vs 51.2%, P < 0.05 and 66.6 vs 63.1 g, P < 0.005 respectively) during and after the period of stress in the group given 500 mg vitamin E/kg. Plasma concentrations of calcium, vitellogenin (zinc) and VLDL (triglyceride) were also...

144 citations