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Effects of biotin with different levels on the growth performance in early period and biotin deficiency in the later period of Peking duck

Zhu Yongwen,Hou Shuisheng,Yang Lin,Xie Ming,Huang Wei  
In order to investigate the effect of different levels of biotin on the growth performance of 1 to 14 days old Peking ducks,and to observe biotin deficiency in the later period of Peking duck.Total of 512 one-day-age male Peking ducks were allotted into 8 treatments randomly.Each treatment consisted of 8 replicates with 8 birds each.The results showd that the body weight gain and feed intake in 1 to 14 days old Peking duck were improved with the increase of dietary biotin(P0.05);but the feed:gain was not improved(P0.05).The optimal level of biotin was estimated 0.186 mg/kg by broken-line regression analysis based on body weight gain.The expression of biotin deficiency was on the eyes,feather,leg and liver in order,associated with the fatty liver and kidney syndrome(FLKS).
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