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Effects of Single or Mixed Feeding of Lactobacillus and Yeast on Performance, Nutrient Digestibility, Intestinal Microflora, and Fecal NH$_{3}$ Gas Emission in Laying Hens  

김상호 (축산기술연구소 가금과)
유동조 (축산기술연구소 가금과)
박수영 (축산기술연구소 가금과)
이상진 (축산기술연구소 가금과)
치철환 (축산기술연구소 가금과)
성창근 (충남대학교 식품공학과)
류경선 (전북대학교 생체안전연구소)
Publication Information
Korean Journal of Poultry Science / v.29, no.3, 2002 , pp. 225-231 More about this Journal
Abstract
Total 240 of ISA Brown layers were employed in this experiment to study the effects of single or mixed feeding of Lactobacillus and yeast on the performance and intestinal microflora of laying hens. They were randomly allocated to six dietary treatments; None(Control), Pichia farinosa(PF), Lactobacillus crispatus avihen1 (LCH), Lactobacillus vaginalis avihen1(LVH), LCH+PF, and LVH+PF. Viable microflora were added to meet 3${\times}$10$\^$6/ cfu PF and 10$\^$7/ cfu Lacrobacillus per g of feed. There were four replicates per treatment, and 10 birds per replicates. Laying performance was recorded for 10 weeks, followed by a metabolism trial during which nutrient utilization, pattern of intestinal microflora and fecal NH$\sub$3/ emission were examined. Egg production and daily egg mass of birds fed either single or mixed microorganisms were significantly higher than those of the control(P<0.05). Egg weight and feed intake were not statistically different among all treatments. However, feed conversion ratio tended to improve by the supplementation of microbes. Digestibility of crude protein, ether extract and crude ash tended to improve in Lactobacillus treatments, however, there were not statistically different. With regards to the number of intestinal microbes, number of anaerobes were increased in microbes feeding group. Eggshell quality of PF layers was significantly poorer than those of the other treatments. No consistent trend was found in Haugh Unit among all treatments. Fecal NH$\sub$3/ gas emission was significantly lower in LVH, LVH+PF and LCH+PF than the other treatments(P<0.05). From the result of this experiment, it could be concluded that single or mixed feeding of Lactobacillus and yeast improves the laying performance and decreases the fecal ammonia gas emission. No synergic effect was found when both microbes were mixed and fed to the layers.
Keywords
Lactobacillus; yeast; laying hen; performance; intestinal microflora;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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