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Open AccessArticle

Impact of Dietary Supra-Nutritional Levels of Vitamins A and E on Fertility Traits of Broiler Breeder Hens in Late Production Phase

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Department of Animal Science, Rasht Branch, Islamic Azad University, 14536 Rasht, Iran
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Department of Veterinary Science, Rasht Branch, Islamic Azad University, 14536 Rasht, Iran
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Department of DETO, Section of Veterinary Science and Animal Production, University of Bari ‘Aldo Moro’, 70010 Valenzano, Italy
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Department of Agricultural and Environmental Science, University of Bari ‘Aldo Moro’, 70125 Bari, Italy
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Department of Zootechnics, Universidade de Trás-os-Montes e Alto Douro (UTAD), 5001-801 Vila Real, Portugal
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Animal and Veterinary Research Centre—CECAV, 5001-801 Vila Real, Portugal
*
Author to whom correspondence should be addressed.
Agriculture 2018, 8(10), 149; https://doi.org/10.3390/agriculture8100149
Received: 4 September 2018 / Revised: 18 September 2018 / Accepted: 25 September 2018 / Published: 27 September 2018
(This article belongs to the Special Issue Nutrition and Quality of Animal Products)
This study aimed to evaluate the effect of dietary supplementation with supra-nutritional levels of vitamins A and E on fertility and productivity traits of Ross-308 broiler breeder hens during the late production phase. The trial was conducted for nine weeks, from 61 to 69 weeks of age, and designed to test four levels of vitamin A (100, 125, 150 and 200% above the Ross catalogue recommendations) and four levels of vitamin E (100, 200, 300 and 400% above Ross catalogue instructions), maintaining constant the other rearing conditions. Vitamins were combined in 16 treatments, with four replicates per treatment each including seven females, and one rooster broiler was used in every two replicates. A total of 448 hens and 32 roosters were used in the experiment. Fertility parameters were weekly evaluated. According to the results, egg-related parameters (number and weight of eggs, non-conform eggs and hatchability) were not affected by treatment, but dietary treatments increased and extended the hens’ productivity for an additional six weeks in most experimental groups. The chick-related parameters (number and weight of produced chicks) and chick yield differed significantly among groups (p < 0.05). The best economic index was found in birds fed basal-diet plus 100% of vitamin A and 200% of vitamin E. In conclusion, the present study showed that a combination of dietary supra-nutritional levels of vitamins A and E allowed to extend the laying period and to reduce the decline of fertility in older breeder hens at the end of the laying stage; in particular, among the 16 tested treatments, feeding of supra-nutritional level of 100% vitamin A and 200% vitamin E lead to the best results. View Full-Text
Keywords: broiler breeder; vitamin A; vitamin E; nutrition broiler breeder; vitamin A; vitamin E; nutrition
MDPI and ACS Style

Yaripour, M.; Seidavi, A.; Dadashbeiki, M.; Laudadio, V.; Tufarelli, V.; Ragni, M.; Payan-Carreira, R. Impact of Dietary Supra-Nutritional Levels of Vitamins A and E on Fertility Traits of Broiler Breeder Hens in Late Production Phase. Agriculture 2018, 8, 149.

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