有机锌对绵羊消化代谢及免疫机能的影响

Effects of Organic Zinc on Rumen Fermentation and Immune Responses of Wethers

利用蛋氨酸锌对绵羊进行消化代谢和免疫机能的研究。结果表明 :(1)饲喂蛋氨酸锌 (Zn Met)有降低绵羊瘤胃液 pH值的趋势 ;氧化锌组和蛋氨酸锌组的瘤胃液中NH3-N浓度都比对照组高 ,而ZnMet组的NH3-N水平比ZnO组有所降低 ,但较平稳。ZnMet具有一定的过瘤胃性能。(2 )ZnMet组绵羊布氏杆菌试管凝集反应抗体滴度明显高于ZnO组和对照组 (P <0 0 5) ;ZnMet能够明显提高绵羊血清γ -球蛋白含量、淋巴细胞ANAE染色阳性率和外周血T淋巴细胞转化率。可见 ,蛋氨酸锌对绵羊瘤胃 pH值 。

Two studies were conducted by using nine wethers to test the effects of zinc methionine on rumen fermentation and immune response.Experiment results showed that:(1) pH value was lower in zinc Methionine group;(2) NH 3-N concentrations of the zinc oxide and zinc methionine groups were higher than the control group;(3) Amino acid contents of rumen fluid were not significantly affected by different zinc sources,but amino acid contents entering intestine were significantly affected,intestinal Cys,Gly,His,Met and Tyr contents in zinc methionine group were significantly higher than those of the zinc oxide and control groups,this shows certain rumen bypass of zinc methionine.Immune responses were significantly increased by using zinc methionine.