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| Author(s): |
Elaine Talita Santos
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | Jaboticabal. 2017-04-25. |
| Institution: | Universidade Estadual Paulista (Unesp). Faculdade de Ciências Agrárias e Veterinárias. Jaboticabal |
| Defense date: | 2017-02-06 |
| Advisor: | Silvana Martinez Baraldi Artoni; Sarah Sgavioli |
| Abstract | |
The purpose of this study was to verify the additive effects with glycosaminoglycans (chondroitin sulfate and glucosamine) and vitamin C in ovo feeding and diet of broilers. Two incubation experiments and one rearing experiment were carried out, respectively. A total of 490 Cobb® fertile broiler eggs were incubated and distributed in completely randomized experimental design, with five treatments: un-injected egg, in injection egg of 0, 2, 4 and 6 μg additive/100 μL water on day four of incubation. Data were subjected to analysis of variance by the General Linear Model procedure (GLM) of SAS®. Were evaluated the treatments effect in relation the incubation parameters, chick quality post hatching and bone characteristics. In ovo feeding with glycosaminoglycans (GAGs) and vitamin C did not interfere on incubation parameters and promoted improvement of bone development in chicks after hatching. Two thousand hundred sixty (2,160) Cobb® fertile broiler eggs were distributed into five teen trays (repetitions) with seventy-two eggs/treatment/tray. After hatching, 760 birds were housed and distributed in a 2x2 factorial design. Were two incubation treatments (un injected eggs and eggs injected with 4 μg of additive) and two rearing treatments (with 0.74 g of additive/100 kg of feed). The purpose of this study was to determine if in ovo feeding or feed nutrition with glycosaminoglycans (chondroitin sulfate and glucosamine sulfate) and vitamin C would influence on bone and cartilage macroscopic, mineral composition, densitometry, breaking strength and histology of the femur and tibia, blood parameters, performance and carcass yield of broilers at 42 days of age.The effects of 4 μg additive in ovo feeding and 0.74 g/kg additive in feed nutrition were submitted to analysis of variance using the General Linear Model procedure (GLM) of SAS®. We conclude that in ovo feeding or during broiler rearing, with chondroitin sulfate, glucosamine sulfate and vitamin C, act on the bone and cartilaginous system development of birds positively, when used isolated and may represent the solution to bone problems in broilers. (AU) | |
| FAPESP's process: | 13/04158-8 - Injection of glycosaminoglycans and vitamin C in incubation parameters on bone development, growth performance and carcass yield in broiler breeding |
| Grantee: | Elaine Talita Santos |
| Support Opportunities: | Scholarships in Brazil - Doctorate |