饲粮中添加不同水平油菜花粉对蛋黄和鸡肉组织脂肪酸组成的影响

Effects of Dietary Different Levels of Rape Pollen on the Fatty Acid Composition in Egg Yolk and Tissues of Laying Hens

中文关键词:  油菜花粉  蛋黄  ω-3系多不饱和脂肪酸  饲粮

英文关键词:rape pollens  egg yolk  ω-3 polyunsaturated fatty acid  diet

中文摘要:

      目的 分析饲粮中添加不同水平油菜花粉对蛋黄和鸡肉组织脂肪酸组成的影响。方法 选用210日龄的海兰褐壳蛋鸡540只, 随机分为4组, 基础饲粮中分别添加0%(A组)、3%(B组)、5%(C组)、8%(D组)的油菜花粉, 预饲1周后, 连续饲喂50 d后改喂基础饲粮, 观察至第70 d。结果 实验前期(0~50 d)蛋黄中?-3PUFA、?-ALA、DHA含量随着饲粮中油菜花粉添加量的增加而增加, D组增加极显著(P＜0.01)。蛋黄中?-6/?-3PUFA比值随着花粉添加量的增加而降低, 其中D组在第5d至30d降低极显著(P＜0.01)。实验后期(50~70d)蛋黄中?-3 PUFA、?-ALA、DHA含量和?-6/?-3PUFA比值逐渐恢复至对照组水平。添加花粉对脑组织中脂肪酸组成无显著影响(P＞0.05); 胸肌中?-3PUFA含量随着花粉添加量的增加而明显降低, 其中C组差异极显著(P＜0.01), D组差异显著(P＜0.05); 各花粉添加组鸡肝中?-3PUFA含量分别为1.96%、1.89%、3.11%和3.28%, D组差异极显著(P＜0.01), 脂肪组织中?-3PUFA含量分别为1.61%、1.84%、1.86%、2.27%, D组差异显著(P＜0.05)。结论 饲粮中添加油菜花粉能够提高蛋黄、肝脏和脂肪组织中?-3PUFA的含量, 在3%、5%和8%三个花粉添加水平中以8%花粉添加水平效果最好。

英文摘要:

      Objective To investigate the effects of dietary different levels of rape pollens on the fatty acid composition in egg yolk and tissue of laying hens. Methods 210 days old, five hundred and forty healthy Hy-Line variety brown hens which were in egg-laying peak were randomly allotted to four treatments, supplying with 0%(group A), 3%(group B), 5%(group C) and 8%(group D) rape pollens in basal diet respectively. The experiment lasted for 70 d included two phases, the first phase fed with basal diets and rape pollens (0~50 d) and the second phase fed with basal diets only (51~70 d) respectively. Results In the first stage (0~50 d), the contents of ?-3PUFA, ALA and DHA in egg yolk increased with the increasing of die-tary rape pollens. But the ratio of ?-6/?-3PUFA was exact opposite and group D had significant difference from 5 d to 30 d (P<0.01). The content of ?-3PUFA, ALA and DHA in egg yolk and the ratio of ?-6/?-3PUFA returned to its original level in the second stage(51~70 d). Dietary different levels of rape pollens had no effect on the fatty acid composition in brain(P＞0.05). The contents of ω-3PUFA in breast meat decreased with the increasing of dietary rape pollens. The contents of ω-3PUFA in chicken liver were 1.96%, 1.89%, 3.11% and 3.28% respectively. Group D increased significantly(P＜0.01). The contents of ω-3PUFA in adipose tissue were 1.61%, 1.84%, 1.86% and 2.27% respectively. Group D increased significantly (P＜0.05). Conclusion Dietary rape pollens can increase the content of ω-3PUFA in egg yolk, liver and adipose tissue. The diet containing 8% of rape pollens showed the best effect among three dosages.