半胱胺对山羊瘤胃消化代谢的影响

以 5只装有永久性瘤胃瘘管的去势公山羊为试验动物 ,研究每日添加半胱胺 (15mg/kgBW )对瘤胃消化代谢的影响 ,试验采用自身对照设计。结果表明 :每日食入半胱胺 8d后 ,瘤胃微生物蛋白和氨氮含量分别上升2 2 .6 1% (P <0 .0 1)和 18.13% (P <0 .0 5 ) ;总挥发性脂肪酸浓度提高 18.86 % (P <0 .0 1) ,乙酸比例提高 2 .0 5个百分点 (P <0 .0 0 1) ,丙酸比例降低 2 .4 5个百分点 (P <0 .0 0 1) ,A :P由 4 .87上升到 5 .84 (P <0 .0 0 1) ,发酵类型发生变化 ;干草采食量明显增加 ,但干物质和粗纤维消失率未出现变化。提示连续使用半胱胺对反刍动物瘤胃消化代谢有促进作用。

Effects of cysteamine on goat rumen digestion and metabolism

Five castrated male goats with permanent rumen fistulae were used to study the effects of CS(15mg/kgBW, added to food everyday over 8d) on rumen digestion and metabolism. At the end of the experiment, the concentrations of MCP and NH3-N increased by 22.61%(P<0.01) and 18.13%(P<0.05). TVFA of the rumen fluid was 18.86% higher (P<0.01), while Acetate% increased by 2.05 percentage point(P<0.001), Propionate% decreased by 2.45 percentage point(P<0.001), as a result the Acetate:Propionate ratio elevated to 5.84 from 4.87(P<0.001), which changed the ruminal fermentation type. At the same time, hay intake increased by 13.65%(P<0.05), compared to that of control. But no significant changes were found in the disappearance rate (48h)of DM and CF. The result indicates that oral delivery of CS also improves rumen fermentation. At the same time, blood GH increased 29.38%(P<0.05) and SS concentration tended to lower 13.30%(P=0.25)..8 6%high