Document Type : Research Paper
Authors
Animal Science Reaserch Institue of Iran
Abstract
Abstract:
This study was conducted to evaluate the effects of dietary supplementation of guanidine acetic acid and mating management current methods on the performance of Ross 308 broiler breeders. This experiment was done in a completely randomized design and factorial methods with three levels of GAA (0. '0.12 and 0.16 g/kg of diet) and three mating management methods (without management, spiking and intra-spiking methods) with 6 replicates (experimental unit) and 8 hens and one rooster in each (totally 486 bird). During this period, adjectives performance (egg production percentage, egg mass weight (g/hen/d) and feed conversion ratio) were measured. Dietary inclusion of GAA at levels of 0.12 and 0.16 g/kg of diet had negative effects on the above traits (P<0.05). In addition, the use of different methods of mating management did not have a significant effect on performance traits .The interaction effects of GAA and mating management methods were not significant on egg production, egg weight, egg mass weight and feed conversion ratio. Dietary supplementation of GAA, mating management method and their interactions on fertility and hatching percentage were not significant (P>0.05). The effect of GAA level on nitric oxide concentration was significant (P<0.05). The highest concentration of nitric oxide was observed at the level of 0.12 g/kg diet, The dietary inclusion of GAA at levels of 0.12 and 0.16 g/kg of diet and the application of mating management methods could not improve production and reproduction performance of Ross 308 broilers breeders.
Keywords
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