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http://dx.doi.org/10.5536/KJPS.2007.34.1.009

Effects of Coastal Mud-Flat Bacteria Origin Pretense Supplementation on Laying Performance, Nutrient Digestibility and Total Protein Concentration of Serum in Laying Hens  

Kim, H.J. (Department of Animal Resource & Science, Dankook University)
Cho, J.H. (Department of Animal Resource & Science, Dankook University)
Chen, Y.J. (Department of Animal Resource & Science, Dankook University)
Yoo, J.S. (Department of Animal Resource & Science, Dankook University)
Min, B.J. (Department of Animal Resource & Science, Dankook University)
Kim, I.H. (Department of Animal Resource & Science, Dankook University)
Publication Information
Korean Journal of Poultry Science / v.34, no.1, 2007 , pp. 9-14 More about this Journal
Abstract
This study was conducted to investigate the effects of coastal mud-flat bacteria origin protease supplementation on laying performance, nutrient digestibility and total protein concentration of serum in laying hens. A total of 252 laying hens were randomly allocated into three treatments with seven replications for eight weeks. Dietary treatments included 1) CON (basal diet), 2) PRO1 (basal diet + 0.05% protease) and 3) PRO2 (basal diet + 0.1% protease). During the entire experimental period, hen-day egg production was not affected by treatments (P>0.05). Difference of yolk height was increased in PRO1 treatment compared with CON treatment (P<0.05). Difference of egg weight was increased in PRO2 treatment compared with CON and PRO1 treatments (P<0.05). Shell quality, yolk color unit, haugh unit and egg yolk index were not affected by treatments (P>0.05). DM digestibility was improved in CON and PRO2 treatments compared with PRO1 treatment (P<0.05). N digestibility was improved in PRO2 treatment compared with CON treatment (P<0.05). Total protein concentration in serum were not affected by treatments (P>0.05). In conclusion, mud flat bacteria origin protease was effective for improving egg weight, yolk height and nutrient digestibility in laying hens.
Keywords
mud flat bacteria origin protease; egg quality; nutrient digestibility; total protein;
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Times Cited By KSCI : 1  (Citation Analysis)
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