铁和维生素A及其互作效应对产蛋鸡生产性能和血清激素水平及铁代谢的影响  

Effects of Iron and Vitamin A and Their Interaction on Performance,Hormone Levels in Serum and Metabolism of Iron in Laying Hens

作　　者：张利环[1] 巩振华[2] 王博[3] 张春善[3,2] 张映[2] 杨瑞娟[2] 高晔[2] 樊君[2] 

机构地区：[1]山西农业大学生命科学学院,太谷030801 [2]山西农业大学动物科技学院,太谷030801 [3]河北科技师范学院动物科学系,昌黎066600

出　　处：《动物营养学报》2009年第3期348-355,共8页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：河北科技师范学院博士科研启动项目基金;山西农业大学科技创新基金(2004063);山西省科技攻关项目基金(052007)

摘　　要：本试验旨在探讨铁和维生素A及其互作效应对产蛋鸡生产性能和血清激素水平及铁代谢的影响。采用3×2(铁×维生素A)完全随机试验设计,选用27周龄商品代海兰褐产蛋鸡432只,随机分为6个处理,每个处理6个重复,每个重复12只鸡,试验期8周,分27～30周龄和31～34周龄2个阶段。日粮中铁的添加量为0、30、60 mg/kg,维生素A的添加量为4 000、8 000 IU/kg。结果表明:1)日粮铁的添加水平对产蛋鸡产蛋率、平均日采食量、料蛋比和血清生长激素水平、铁含量、总铁结合力、铁饱和度的影响均不显著(P>0.05),但可显著提高平均蛋重、血清胰岛素水平和铜蓝蛋白活力(P<0.05);2)日粮维生素A的添加水平对产蛋率、平均蛋重、平均日采食量、料蛋比和血清生长激素水平、胰岛素水平、铁饱和度的影响均不显著(P>0.05),但可显著提高血清铁含量、总铁结合力及铜蓝蛋白活力(P<0.05);3)铁和维生素A互作效应对产蛋率、平均蛋重、平均日采食量、料蛋比和血清生长激素水平、胰岛素水平、铁含量、总铁结合力、铁饱和度的影响均不显著(P>0.05),但对血清铜蓝蛋白活力的影响显著(P<0.05)。结果提示常规日粮中添加铁没有明显改善产蛋鸡的生产性能,维生素A促进了铁的吸收。The study was conducted to investigate the effects of iron and vitamin A on performance, hormone levels in serum and metabolism of iron in laying hens. A 3 × 2 （iron× vitamin A） completely random experiment was designed. A total of four hundred and thirty-two 27-week-old commercial Hyline Brown laying hens were randomly divided into 6 treatments. Each treatment contained 6 replicates with 12 laying hens per replicate. The experiment lasted for 8 weeks which contained two periods of 27~30 weeks of age and 31~34 weeks of age. Iron supplemental levels were 0, 30, 60 mg/kg, and vitamin A supplemental levels were 4 000, 8 000 IU/kg, respectively. The results showed that： 1） laying rates, average daily feed intake, feed-egg ratio and the levels of growth hormone, iron, total iron-binding capacity and iron saturation in serum were not significantly affected （P〉0.05）, but increased average egg weight, insuline levels and ceruloplasmin activity in serum （P〈0.05） by dietary supplementation of iron; 2） laying rates, average egg weight, average daily intake, feed-egg ratio, and the levels of growth hormone, insuline and iron saturation in serum were not significantly affected （P〉0.05）, but increased the concentration of iron, total iron-binding capacity, and ceruloplasmin activity in serum （P〈0. 05） by dietary supplementation of vitamin A; 3） interaction of iron and vitamin A only significantly increased the activity of ceruloplasmin in serum （P〈0. 05）. The results indicated that dietary supplementation of iron did not improve the performance of laying hens, but dietary supplementation of vitamin A promoted the absorption of iron.

关 键 词：产蛋鸡 铁 维生素A 互作效应 生产性能 激素 

分 类 号：S816.7[农业科学—饲料科学] S831.5[农业科学—畜牧学]