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Microbiology and Biotechnology Letters

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Microbiol. Biotechnol. Lett. 2010; 38(4): 391-398

박테리오신 OR-7을 생산하는 항균 효모의 양계에서의 사양시험 효과

Efficacy of Antibacteriocidal Yeast That Producing Bacteriocin OR-7 in Chicken

Dong-In Cho , Sang-Mo Kang , Jae-Hwa Lee , Sang-Hyeon Lee , Nam-Young Kim and Ki-Seuk Kim

Department of Biological Engineering, Konkuk University, 1Department of Biological Engineering, Konkuk University, 2Department of Bioscience and Biotechnology, Silla University, 3Department of Bioscience and Biotechnology, Silla University, 4Department of Bioscience and Biotechnology, Silla University, 5Department of Veterinary Public Health, College of Veterinary Medicine, Kyungpook National University

Abstract

This study was conducted to investigate the effects of feeding probiotics(gene modified yeast) on the egg quality in laying hens. The laboratory method of this study is as follow: In hens, 300, 36 weeks old ISA brown commercial layer, were employed in 13weeks feeding trial with a 7 days adjustment period. Dietary treatments are 1) control (basal diet) 2) Y0.3 (basal diet+0.3% probiotics), 3) Y0.5% (basal diet+0.5% probiotics), 4) PY0.3% (basal diet+0.3% plasmid modified probiotics), 5) PY0.5% (basal diet+0.5% plasmid modified probiotics). For overall period, hen-day egg production, egg weight (p<0.05) by dietary probiotic supplementation were recorded. Eggs were collected and weighed every day. Egg production number and egg production rate, egg weight, failure egg ratio and trouble egg ratio were recorded for 13weeks days. Diets PY0.3 and PY0.5 improved Egg production rate, egg production number and egg weight, compared to control diet (linear effect. p<0.05). And, diets PY0.3 and PY0.5 improved Egg production rate, egg production number, compared to Y0.3 and Y0.5 (linear effect. p<0.05). But, in Inferior egg and cracked egg, diets PY0.3 and PY0.5 did not tended to increase by dietary probiotic supplementation compared to control diet and Y group (0.3, 0.5) (linear effect. p<0.05). The productivity enhance on the egg quality in laying hens is considered from the effects of feeding probiotics(gene modified yeast).

Keywords: yeast, feed efficiency, dietary probiotics, layer, egg production ratio, chicken productivity test

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