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http://dx.doi.org/10.5536/KJPS.2007.34.4.287

Effect of Dietary Supplementation of Aspergillus oryzae Ferment on Growth Performance of Broiler Chicks and Microbial Population and Fecal Ammonia Production  

Son, J.H. (Seoul Dairy CO-OP / Geochang Plant, Quality Assurance Team)
Cho, I.K. (Department of Food and Nutrition, Nambu University)
Publication Information
Korean Journal of Poultry Science / v.34, no.4, 2007 , pp. 287-294 More about this Journal
Abstract
Current study was conducted to identify the effects of dietary supplementation of Aspergillus oryzae ferments (AOF) cultured under normal (NAOF) or nitrogen-deficient (NMAOF) environment on feed efficiency, nutrient digestibility for broiler chicks. Fecal microbes and ammonia gas production were also determined. A total of 168 male Avian chicks, 2-wk-old, were randomly assigned into 56 cages, three chicks per cage. There were seven treatments (Control, NAOF 0.05, 0.1, 0.5%, NMAOF 0.05, 0.1, 0.5%), with 8 replicates (cages) per treatment. There was no significant difference in nutrient digestibility between two AOF groups, but the digestibility was greatly(p<0.05) improved by AOF supplementation. Total microbial account significantly (p<0.05) differed between the treatment groups with the highest number for NNAOF, followed by NAOF and control. In the case of Escherichia coli and Salmonella, the AOF supplementation significantly (p<0.05) reduced their numbers in feces, with a particular reduction in NNAOF group. Levels of ammonia gas generation were in order of control>NAOP>NNAOP. The current data implied that AOF supplementation, particularly grown under nitrogen-deficient environment, would be a feasible way to improve feed efficiency for broiler production, as well as to reduce environmental cost. However, further studies remain for industrial application.
Keywords
broiler; Aspergillus oryzae; feed efficiency; Escherichia coli; Salmonella; ammonia gas;
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