不同钙水平饲粮添加低聚木糖对蛋鸡生产性能蛋鸡生产性能、血液生化指标、钙磷表观利用率及骨骼质量的影响

发布时间：2018-09-14 07:31

【摘要】：本试验旨在研究不同钙水平饲粮添加低聚木糖对蛋鸡生产性能、血液生化指标、钙磷表观利用率及骨骼质量的影响。采用2×2因子设计,即2个钙水平(3.5%∶正常组和2.5%∶低钙组)和2个低聚木糖添加量(0和300 mg/kg)。选取41周龄罗曼粉壳蛋鸡360只,随机分为4个处理,每个处理6个重复,每个重复15只鸡。试验期8周。结果表明:(1)降低饲粮钙水平和添加低聚木糖对蛋鸡生产性能均没有显著影响(P0.05)。(2)降低饲粮钙水平和添加低聚木糖对蛋壳厚度与强度、蛋白高度、哈夫单位、蛋壳与蛋黄重均没有显著影响;添加低聚木糖,蛋黄比色显著增加(P0.05)。(3)添加低聚木糖显著降低低密度脂蛋白含量(P0.05);降低饲粮钙水平和添加低聚木糖对总胆固醇、甘油三酯、高密度脂蛋白、极低密度脂蛋白、血磷含量均没有显著影响(P0.05)。(4)与正常钙水平相比,降低钙水平,钙磷的表观利用率有升高趋势,但差异不显著(P0.05);添加低聚木糖,钙的表观利用率显著升高(P0.05),磷的表观利用率没有显著影响(P0.05)。(5)饲粮钙水平降低,蛋鸡胫骨强度及胫骨中钙含量均显著降低(P0.05),但对股骨强度及股骨中钙含量没有显著影响(P0.05);添加低聚木糖,股骨中钙含量显著增加(P0.05),对胫骨强度、股骨强度和胫骨钙含量有提高的趋势,但差异不显著(P0.05)。由此可见,蛋鸡饲粮钙水平降低1%饲喂8周后,蛋鸡胫骨强度显著降低,但对蛋鸡生产性能、蛋品质、血脂和钙利用率均没有影响;正常钙饲粮水平添加低聚木糖可显著降低血清中的低密度脂蛋白含量,提高钙的表观利用率,增加股骨强度和钙浓度,对生产性能没有显著影响;低钙饲粮添加低聚木糖对蛋鸡没有显著影响。
[Abstract]:The purpose of this study was to study the effects of xylooligosaccharides on performance, blood biochemical index, apparent utilization ratio of calcium and phosphorus and bone quality in layers fed with different calcium levels. Two calcium levels (3.5: normal and 2.5: low calcium) and two xylooligosaccharides (0 and 300 mg/kg) were used in a 2 脳 2 factor design. 360 41-week-old Roman powder-shell laying hens were randomly divided into 4 treatments with 6 replicates each and 15 chickens per replica. The trial period was 8 weeks. The results were as follows: (1) decreasing dietary calcium level and adding xylooligosaccharide had no significant effect on the performance of laying hens (P0.05). (2). Decreasing dietary calcium level and adding xylooligosaccharide to egg shell thickness and intensity, protein height, Hafu unit were not significant. The weight of egg shell and egg yolk had no significant effect, the color ratio of egg yolk increased significantly (P0.05). (3), the content of low density lipoprotein decreased significantly (P0.05), the level of dietary calcium and the effect of xylooligosaccharide on total cholesterol and triglyceride were decreased by adding xyloxyoligosaccharide (P0.05). High density lipoprotein, very low density lipoprotein, blood phosphorus content had no significant effect (P0.05). (4), compared with the normal calcium level, the calcium level decreased, the apparent utilization ratio of calcium and phosphorus increased, but the difference was not significant (P0.05), the addition of xylooligosaccharide, The apparent utilization ratio of calcium increased significantly (P0.05), but the apparent utilization ratio of phosphorus did not (P0.05). (5). Tibia strength and calcium content in tibia decreased significantly in laying hens (P0.05), but there was no significant effect on femoral strength and calcium content in femur (P0.05); adding xyloxyoligosaccharide significantly increased calcium content in femur (P0.05). Femur strength and tibia calcium content increased, but the difference was not significant (P0.05). It can be seen that the tibia strength of laying hens decreased significantly after feeding for 8 weeks after 1% reduction of dietary calcium level, but had no effect on performance, egg quality, blood lipids and calcium utilization rate of laying hens. The addition of xylooligosaccharide to normal calcium diet could significantly reduce the content of LDL in serum, increase the apparent utilization ratio of calcium, increase the strength of femur and calcium concentration, and had no significant effect on the production performance. Adding xylooligosaccharide to low calcium diet had no significant effect on laying hens.
【作者单位】：四川农业大学动物营养研究所动物抗病营养教育部重点实验室;
【基金】：国家科技支撑计划项目(2014BAD13B04) 四川农业大学双支计划团队项目宜宾雅泰生物有限公司资助项目
【分类号】：S831.5

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