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Study on the Production Performance and Safety of Zengdanbao in Laying Hens

Zhang Degang Geng Guoxia Yue Zhiquan Li Xinchao Fu Kewei (College of Animal Science and Veterinary Medicine,Northwestern Agricutural University,Yangling,Shaanxi 712100)  
One hundred and thirty two hens of 455 days old were randomly divided into four groups (A, B, C and D), with thirty three in each grorp.Hens in group A were given ration only,while B, C and D were given ration plus 1%,2%,4% of Chinese midicine Zengdanbao,respectively.The results showed that the rate of laying and feed conversion in group B, C and D increased by 14.48%,16.89%,17.15% and 19.27%,20.48%,20.53% than group A,respectively.Comparing test group with the controls,the percent of T cell E rossette froming cell,serum total protein. globulin,albumin was significantly increased ( P 0.05 or P 0.01),while the other 8 items of blood had no significant difference ( P 0.05).Results from clinical observation and pathological anotomy indicated that there was no any harmful response in all groups.
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