包膜酸化剂和小肽螯合铁对夏季蛋鸡生产性能、蛋黄中微量元素含量及血清免疫和抗氧化指标的影响

发布时间：2018-11-10 18:48

【摘要】：本试验旨在研究包膜酸化剂和小肽螯合铁及其交互作用对夏季产蛋高峰期蛋鸡生产性能、蛋黄中微量元素含量以及血清免疫和抗氧化指标的影响。试验采用2×4双因子完全随机试验设计,其中饲粮中包膜酸化剂设2个添加水平,小肽螯合铁设4个添加水平。选用576只38周龄健康罗曼粉壳蛋鸡,随机分成8个组,每组6个重复,每个重复12只鸡。A、B、C和D组饲粮分别在基础饲粮中添加0 mg/kg包膜酸化剂以及0(对照组)、0.04%、0.08%和0.12%小肽螯合铁(铁含量分别为0、60、120和180 mg/kg);E、F、G和H组饲粮分别在基础饲粮中添加300 mg/kg包膜酸化剂以及0、0.04%、0.08%和0.12%的小肽螯合铁(铁含量分别为0、60、120和180 mg/kg)。预试期1周,正试期6周。结果表明:1)包膜酸化剂和小肽螯合铁及其交互作用对第3周和第6周蛋鸡的平均日采食量、产蛋率和料蛋比均无显著影响(P0.05)。G组第3周和第6周的平均日采食量均显著高于对照组和C、D组(P0.05);B组第6周的产蛋率显著高于对照组和D、E组(P0.05),且料蛋比显著低于D组(P0.05)。包膜酸化剂对第3周末蛋鸡的蛋重、第6周末的蛋黄指数和哈氏单位有显著影响(P0.05);小肽螯合铁对第6周末的蛋黄指数有显著影响(P0.05),小肽螯合铁和包膜酸化剂的交互作用对第6周末的蛋黄指数有极显著影响(P0.01),对第6周末的哈氏单位有显著影响(P0.05)。第3周末,G组的蛋重显著高于B组(P0.05),G和H组的蛋黄指数显著高于C组(P0.05);第6周末,C、D和G组的蛋重显著高于对照组(P0.05),F组的蛋黄指数显著高于C、D和E组(P0.05),E、F和G组的哈氏单位显著高于D组(P0.05)。2)小肽螯合铁及包膜酸化剂和小肽螯合铁的交互作用对第3周和第6周末蛋鸡蛋黄中铁元素含量有极显著影响(P0.01)。B、C、D、F、G和H组第3周和第6周末蛋黄中铁元素含量极显著高于对照组和E组(P0.01),且H组第3周末蛋黄中铁元素含量显著高于B和F组(P0.05);H组第3周末蛋黄中锌元素含量显著高于F组(P0.05),B组第6周末蛋黄中锌元素含量显著高于D组(P0.05)。3)包膜酸化剂对蛋鸡血清中总超氧化物歧化酶(T-SOD)活性有极显著影响(P0.01),对血清丙二醛(MDA)含量有显著影响(P0.05);包膜酸化剂和小肽螯合铁的交互作用对血清T-SOD活性有极显著影响(P0.01)。C组血清免疫球蛋白M(Ig M)含量显著高于对照组(P0.05),D、E、F、G和H组血清T-SOD活性极显著高于对照组(P0.01);B、F和G组血清MDA含量显著低于对照组和E组(P0.05)。综合考虑,饲粮中单独添加0.04%和0.08%的小肽螯合铁或与300 mg/kg包膜酸化剂复合添加均有利于维持和延长蛋鸡夏季的产蛋高峰期,改善蛋品质,增加蛋中铁元素的富集,增强机体抗氧化能力。
[Abstract]:The purpose of this experiment was to study the effects of encapsulated acidifier and small peptide chelate iron and their interaction on the performance of laying hens in the peak period of laying in summer, the content of trace elements in yolk, and the indexes of serum immunity and antioxidation. The experiment was designed by 2 脳 4 double factor complete random experiment, in which 2 levels were added to the dietary capsule acidifier and 4 levels were added to the small peptide chelate iron. A total of 576 healthy 38-week-old Roman powder shell laying hens were randomly divided into 8 groups with 6 replicates in each group and 12 chickens in each replica. Groups A, B, C and D were fed with 0 mg/kg capsule acidifier and 0 (control group), respectively. 0.04% and 0.12% small peptide chelate iron (iron content were 0 ~ 60120 and 180 mg/kg, respectively); The diets of group E FG and group H were supplemented with 300 mg/kg encapsulated acidifier and 0. 04% and 0. 12% of small peptide chelate iron (iron content was 0 ~ 60120 and 180 mg/kg, respectively). The pretest period was 1 week and the positive test period was 6 weeks. The results showed that: 1) the average daily feed intake of laying hens at the 3rd and 6th week was determined by coating acidifier, iron chelate with small peptide and their interaction. There was no significant difference in egg laying rate and feed to egg ratio (P0.05). The average daily feed intake of). G group was significantly higher than that of control group and Cedar D group (P0.05). The egg laying rate of group B was significantly higher than that of control group and DNE group (P0.05), and the ratio of feed to egg was significantly lower than that of group D (P0.05). The coating acidifier had significant effects on egg weight at the end of the 3rd week and the egg yolk index and the hardy unit at the end of the 6th week (P0.05). Iron chelate had a significant effect on yolk index at the end of the 6th week (P0.05), and the interaction between ferric chelate and encapsulated acidifier had a significant effect on the yolk index at the end of the 6th week (P0.01). It had a significant effect on the Hardy units at the end of the 6th week (P0.05). At the end of the third week, the egg weight of group G was significantly higher than that of group B (P0.05) (P0.05) and the yolk index of group H was significantly higher than that of group C (P0.05). At the end of the 6th week, the egg weight of group C D and G was significantly higher than that of control group (P0.05), E,). The yolk index of group), F was significantly higher than that of group C D and group E (P0.05), E,). The interaction of small peptide chelate iron, encapsulated acidifier and small peptide chelate iron in F and G groups was significantly higher than that in D group (P0.05). The iron content in egg yolk at the 3rd and 6th week was significantly affected by the interaction of the small peptide chelate iron and the small peptide chelate iron in the egg yolk at the 3rd and 6th week. (P0.01). B, The content of iron in yolk of group C and H was significantly higher than that of control group and group E at the 3rd and 6th week (P0.01), and the content of iron in yolk of group H was significantly higher than that of group B and F at the end of the third week (P0.05). The content of zinc in yolk of group H was significantly higher than that of group F at the end of the third week (P0.05). The content of zinc in yolk of group B was significantly higher than that in group D at the end of the 6th week (P0.05). The serum activity of total superoxide dismutase (T-SOD) was significantly affected by the coating acidifier (P0.01). The content of malondialdehyde (MDA) in serum was significantly affected (P0.05). The interaction between encapsulated acidifier and ferric chelate had a significant effect on the activity of serum T-SOD (P0.01). C group was significantly higher than the control group (P0.05), the content of M (Ig M) in serum of P0.01). C group was significantly higher than that of control group (P0.05). Serum T-SOD activity in G and H groups was significantly higher than that in control group (P0.01). The levels of serum MDA in group B F and group G were significantly lower than those in group B and E (P 0.05). Considering comprehensively, adding 0.04% and 0.08% ferric chelate of small peptide or combined with 300 mg/kg coating acidifier in diet is beneficial to maintain and prolong the peak period of laying in summer and improve egg quality. Increase the enrichment of iron in eggs and enhance the antioxidant capacity of the body.
【作者单位】：湖南农业大学动物科学技术学院湖南畜禽安全生产协同创新中心;奥格生物技术(上海)有限公司;
【基金】：湖南农业大学产学研合作项目(11110,13098)
【分类号】：S831.5

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