摘要
700只Arbor Acres商品代出壳雏鸡,饲喂相同基础日粮,按维生素E添加量分为E0,E5,E10,E20,E40和E160(IU/千克)6个处理。种母鸡6个处理与此相同。1日龄卵黄囊内α-生育酚含量(微克/个)为;E0-191,E5-216,E10-352,E20-628,E40-1095,E160-3637,呈明显等级性(P<0.01),与入孵蛋种母鸡日粮内α-生育酚含量成正相关。至5日龄,各处理的含量都减少60～70％。肝内α-生育酚和维生素A含量的变化在卵黄囊阶段和饲料阶段截然不同。说明营养素的提供从内源转向外源。α-生育酚对维生素A肝贮量有促进作用。各处理在1～28日龄未发现缺乏症靶子器官病理学变化,高量α-生育酚促进脾脏鞘动脉网状细胞增生,但未发现胸腺,法氏囊和盲肠扁桃体发生组织学变化。建议肉用种母鸡日粮的维生素E添加量为20～40IU/千克。
Seven hundred qne-day-old Arbor Acres chicks, fed with maize soybean meal and fish meal after adding 0 , 5, 10, 20, 40, 160IU vitamin E, were divided into 6 treatmentsE 0 , E5, E10, E20, E40, El60.
The contents of α-tocopherol in one-day-old yolk-sac of E 0 , E5, E10, E20, E40 and E160 were treatments, 19lμg, 216μg, 352μg, 628μg, 1095μg,3637μg bird, respectively. The a-tocopherol content in hatch egg of each treatment positively correlated with that in one-day-old yolk-sac. α-tocopherol content in yolk-sac of 5 day old chicks ratio of each treatment decreased 60-70%. The change of a-tocopherol and vitamin A in liver during the yolk-sac and the feed phase was obviously different. According to the experiment, 1-5 day old chicks attained α-tocopherol and vitamin A mainly from the yolk-sac inner the body, while 7-28 day old chicks from the diet. 5-7 day old was transition period.
出处
《畜牧兽医学报》
CAS
CSCD
北大核心
1990年第3期229-234,共6页
ACTA VETERINARIA ET ZOOTECHNICA SINICA
