1328
Evaluation of Korean aged garlic extract (AGE) by Leukonostoccitreum SK2556 on production achievement, meat quality, relative organ weight, targeted Escherichia coli colony, slurry gas emission and hematological profiles in broilers
The aim of this study was to investigate the effects of dietary supplementation of Korean aged garlic extract (AGE) fermented by Leukonostoccitreum SK2556 on growth performance, meat quality, excreta microbiota, slurry gas emission and blood profiles in broilers. A total of 765 broilers were randomly allotted to 5 treatments with 9 replications per treatment and 17 chicks per pen in this 5-wk trial. The experiment lasted for 5 weeks and dietary treatments were as follows: 1) NC (basal diet, no antibiotics); 2) PC (NC + 5ppm enramycin); 3) AGE1(NC + 0.05% aged garlic extract); 4) AGE2 (NC + 0.1% aged garlic extract); 5) AGE3 (NC + 0.2% aged garlic extract).The broilers were weighed and feed intake were recorded on d 1, 14, 28 and 35 for calculating BW gain (BWG), feed intake (FI), and feed conversion ratio (FCR). All data were subjected to GLM procedures of SAS (1996) as a randomized complete block design, with pen as the experimental unit. Differences among treatments were separated by Duncan's multiple range test; P < 0.05 was considered statistically significant. Broiler fed with AGE2 treatment showed significantly higher (P<0.05) disparity in BWG compared to NC treatment (910 g vs. 842g) at the d 15 to d 28. In the same time, FCR was higher (P=0.0454) in NC (1.95) treatment compared with AGE3 (1.83) and AGE2 (1.81). Growth performance was increased in AGE3 (1756g) and AGE2 (1735g) than NC (1638g) diet (P<0.05) though FCR value was decreased (P= 0.012). Liver weight was decreased in AGE3 (28.27%) and AGE2 (28.27%) compared to NC (40.60%) treatment (P=0.0478). On analyzing of different profiles of breast meat, only redness (a*) was improved in NC treatment than AGE2 (15.94 vs. 12.23; P<0.05). With regards to E. coli load (log10cfu/g), broiler fed NC (6.70) showed distinctly higher count than AGE2 (6.54;P<0.05). The percentage of lymphocyte in blood presented higher in numeric value in AGE1 treatment which was followed by PC, AGE2, NC and AGE3 respectively (P >0.05). In conclusion, our findings demonstrated that the administration of AGE at a level of 0.1% and/or 0.2% can improve body weight gain but reduce the FCR, liver weight as percentage, and E. coli load without significant change in other criteria in broiler.
Keywords: aged garlic extract; broilers; Leukonostoccitreum SK2556; enramycin; growth performance; microflora