Effect of dietary probiotic and high stocking density on the performance, carcass yield, gut microflora, and stress indicators of broilers.

Autor:	Cengiz Ö; Department of Animal Nutrition and Nutritional Diseases, Faculty of Veterinary Medicine, Adnan Menderes University, Aydın 09016, Turkey ozcancen@gmail.com., Köksal BH; Department of Animal Nutrition and Nutritional Diseases, Faculty of Veterinary Medicine, Adnan Menderes University, Aydın 09016, Turkey., Tatlı O; Department of Animal Nutrition and Nutritional Diseases, Faculty of Veterinary Medicine, Adnan Menderes University, Aydın 09016, Turkey., Sevim Ö; Department of Animal Nutrition and Nutritional Diseases, Faculty of Veterinary Medicine, Adnan Menderes University, Aydın 09016, Turkey., Ahsan U; Department of Animal Nutrition and Nutritional Diseases, Faculty of Veterinary Medicine, Adnan Menderes University, Aydın 09016, Turkey., Üner AG; Department of Physiology, Faculty of Veterinary Medicine, Adnan Menderes University, Aydın 09016, Turkey., Ulutaş PA; Department of Biochemistry, Faculty of Veterinary Medicine, Adnan Menderes University, Aydın 09016, Turkey., Beyaz D; Department of Food Hygiene and Technology, Faculty of Veterinary Medicine, Adnan Menderes University, Aydın 09016, Turkey., Büyükyörük S; Department of Food Hygiene and Technology, Faculty of Veterinary Medicine, Adnan Menderes University, Aydın 09016, Turkey., Yakan A; Department of Animal Husbandry, Faculty of Veterinary Medicine, Mustafa Kemal University, Hatay 31000, Turkey., Önol AG; Department of Animal Nutrition and Nutritional Diseases, Faculty of Veterinary Medicine, Adnan Menderes University, Aydın 09016, Turkey.
Jazyk:	angličtina
Zdroj:	Poultry science [Poult Sci] 2015 Oct; Vol. 94 (10), pp. 2395-403. Date of Electronic Publication: 2015 Aug 03.
DOI:	10.3382/ps/pev194
Abstrakt:	A study was carried out to evaluate the effect of dietary probiotic supplementation and stocking density on the performance, relative carcass yield, gut microflora, and stress markers of broilers. One-day-old Ross 308 male broiler chickens (n = 480) were allocated to 4 experimental groups for 42 d. Each treatment had 8 replicates of 15 chicks each. Two groups were subjected to a high stocking density (HSD) of 20 birds/m² and the other 2 groups were kept at low stocking density (LSD) of 10 birds/m². A basal diet supplemented with probiotic 1 and 0.5 g/kg of diet (in starter and finisher diets, respectively) was fed to 2 treatments, one with HSD and the other with LSD, thereby making a 2 × 2 factorial arrangement. There was no interaction between stocking density (LSD and HSD) and dietary probiotic (supplemented and unsupplemented) for all the variables. Feed intake and weight gain were significantly low and feed conversion ratio was poor in broilers at HSD. Dietary probiotic significantly enhanced the feed intake and weight gain in starter phase only. Dietary probiotic supplementation had no effect (P > 0.05) on total aerobs, Salmonella sp., and Lactobacilli populations in the intestines of broilers. However, HSD reduced the Lactobacilli population only (P < 0.05). Relative breast yields were significantly higher in broilers reared at LSD than HSD. Thigh meat yield was higher in broilers in HSD group compared to LSD. Dietary probiotic did not affect the relative carcass yield and weight of lymphoid organs. Serum malondialdehyde, corticosterone, nitric oxide, and plasma heterophil:lymphocyte ratio were not affected either by stocking density or dietary probiotic supplementation. In conclusion, HSD negatively affected the performance and intestinal Lactobacilli population of broilers only, whereas probiotic supplementation enhanced the performance of broilers during the starter phase only. Total aerobes, Salmonella, Lactobacilli carcass yield, and stress indicators of broilers were not affected by the dietary supplementation of probiotic under the conditions of the present study. (© 2015 Poultry Science Association Inc.)
Databáze:	MEDLINE
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