肉仔鸡生物素缺乏症的观测及生物素需要量的探讨  

STUDIES OF HEB BIOTIN DEFICIENCY AND REQUIBEMENI OF BROILER CHICKS

作　　者：李健[1] 侯水生[1] 黄俊纯[1] 

机构地区：[1]中国农业科学院畜牧研究所,天津饲料公司工作

出　　处：《畜牧兽医学报》1994年第4期295-300,共6页ACTA VETERINARIA ET ZOOTECHNICA SINICA

摘　　要：６４８只ＡｒｂｏｒＡｃｒｅｓ商品代一日龄肉雏鸡，饲以小麦基础日粮，分别添加生物素０、５０、１００、１５０、２００、３００（μｇ／ｋｇ日粮）组成６个处理。３周龄时各处理组的体重呈显著差异（Ｐ＜０．０５），２周龄时添加量为０的处理组中开始有缺乏症的表现，脚底粗躁干裂，随着日龄的增长，脚底形成溃疡，病变程度随生物素添加量的提高而降低。生物素严重缺乏导致肝脏积累大量脂肪，未添加生物素组的肝脂含量显著高于添加生物素的组（Ｐ＜０．０１）。组织学观察表明，未添加生物素组的肝细胞内有大量脂滴存在并呈弥漫性分布；胫骨软骨成骨过程缓慢；综合试验各项指标，结果表明：肉用仔鸡生物素需要量可能在３００μｇ／ｋｇ以上。Six hundrad and forty-eight one-day-old Arbor Acres broiler chicks fed withwheat-based diet supplemented with 6 biotin levels(0, 50,100, 150,200 and 300μg.biotin/kg of diet)respectively were used in the experiment.The mean body weightcould be increased significantly with the increment of dietary biotin(P<0. 05).Lesions on the foot pads during the second week and growth depression in the thirdweek were observed markedly as the first signs of biotin deficiency, The severity wasincreased with the time,By supplementing biotin in diet,the lesions were reduced.Inthe non-supplementing group, the lipid content in liver was significantly higher thanthose in the supplemental groups; Histological studies showed lipid accumulated in liverand tibia cartilage growth was slower. However,other organs changed unsignificantly.According to the results of experiment,to meet the hird requirement, 300μg iotinper kilogram wheat-based diet of broiler chicks shoud be supplemented.

关 键 词：雏鸡 生物素缺乏症 需要量 生物素 

分 类 号：S858.316.6[农业科学—临床兽医学]