不同硒源对产蛋后期蛋鸡硒沉积、抗氧化、免疫、生产性能和蛋品质的影响

Effects of Different Selenium Sources on Selenium Deposition,Antioxidant Capacity,Immune Function,Production Performance and Egg Quality of Laying Hens During The Late Laying Period

试验旨在研究亚硒酸钠(sodium selenite,SS)和硒代蛋氨酸(selenomethionine,SM)对产蛋后期蛋鸡硒沉积、抗氧化、免疫、生产性能和蛋品质的影响。选用产蛋率基本一致的70周龄海兰褐蛋鸡,随机分为2组(SS组和SM组),每组6个重复,每个重复12只,进行为期10周的饲养试验。SS组和SM组硒在基础饲粮中添加量均为0.30 mg/kg。结果表明:①SM组血清、卵巢基质、蛋黄和蛋清硒含量显著高于SS组(P<0.05);②与SS组相比,SM组血清和卵巢基质总抗氧化能力和过氧化氢酶活性及卵巢基质超氧化物歧化酶活性显著增高(P<0.05),而血清和卵巢基质丙二醛含量显著降低(P<0.05);③SM组血清免疫球蛋白A(IgA)和免疫球蛋白G(IgG)含量显著高于SS组(P<0.05);④SM组较SS组显著提高了全期产蛋率和试验第10周鸡蛋的蛋壳强度和蛋白高度(P<0.05)。饲粮添加SM较SS可显著提高机体硒沉积,进而增强抗氧化和免疫功能,最终提高产蛋性能和蛋品质。

The purpose of this experiment was to evaluate the effects of sodium selenite(SS)and seleno⁃methionine(SM)on selenium(Se)deposition,antioxidant capacity,immune function,production perfor⁃mance and egg quality of laying hens during the late laying period.In this experiment,70-week-old com⁃mercial Hy-Line Brown laying hens with similar laying rate were selected and randomly divided into two groups with six replicates in each group,and each replicate contained 12 hens.The feeding experiment last⁃ed for 10 weeks.These two groups received the same basal diet supplemented with 0.30 mg Se/kg from SS or SM.The results showed that:①SM group had higher(P<0.05)serum,ovary,egg yolk and egg white Se concentrations than SS group.②Com⁃pared with the SS group,the total antioxidant ca⁃pacity and catalase levels of serum and ovary as well as the superoxide dismutase activity of ovary were significantly increased(P<0.05)and,con⁃versely,the malondialdehyde levels of serum and ovary were significantly decreased(P<0.05)in the SM group.③Serum IgA and IgG levels were higher(P<0.05)in the SM group than those in the SS group.④Compared with the SS group,the eggshell strength and albumen height were significantly in⁃creased in SM group(P<0.05)at week 10 as well as laying rate at the full period.It was concluded that SM was more effective than SS in increasing Se deposition,thus providing an effective way to improve anti⁃oxidant and immune functions,and ultimately increase egg laying performance and egg quality.