日粮维生素水平对生长期蛋鸡影响的研究

Effects of dietary vitamin level on laying hens at growing period

选用4因素3水平正交试验设计，研究日粮维生素A、D3、E对生长期蛋鸡的影响。结果如下：6周末体重随VE水平的提高而提高，但差异不显著。14周末体重受VE的显著影响。高水平（100mg／kg）组显著大于低水平（10mg／kg）组与中水平（40mg／kg）组（P＜0．01），中、低水平之间差异不显著。血清新城疫抗体效价随VA水平的提高而显著提高（P＜0．05）。高水平VA和高水平VE组合组显著高于其它组（P＜0．05）。胫骨中的钙含量随VA水平的提高显著提高（P＜0．01）。VD3对体重、抗体滴度和胫骨Ca含量无显著影响。

The experiment was conducted to study the effects of dietary supplements of vitamin AD3and E on growing egg breed chicken by orthogonal design with four factors at three levels．Results indicated thatat the 6 weeks of agebody weight increased with the increasing of dietary VE（P＞0．05） and significant difference was gotten at the 14 weeks of age （P＜0．01）． Body weight of group fed dietary VE of high level（100mg／kg）was significant greater than that with dietary VE of middle level（40mg／kg）and low level （10mg／kg）．Titer of antibody against Newcastle disease virus increased with the increasing of dietary VA（P＜0．05）and the group fed high level of dietary VA and VE significantly weighed than the other groups （P＜0．05）．Calcium content of tibial bone at 6 week of age increased with the increasing of dietary VA （P＜0．01）．VD3 had no signifivant effects on body weightantibody titer and calcium content of tibial bone．