日粮中相继添加CS87、F89和CIM对山羊瘤胃代谢的影响

选取 5头装有永久性瘤胃瘘管的去势公山羊 ,以青干花生秧 +精料为基础日粮。实验采取前后自身对照的方法。第一阶段为对照期 ;第二阶段基础日粮内添加 15mg/kg·BW·d的CS87;第三阶段精料内添加 8mg/kg的F89。第四阶段精料内添加 0 .1mg/kg·BW的CIM。与第一阶段相比 ,瘤胃液中TVFA水平在第二、第三、第四阶段分别提高 17.4 7% (P <0 .0 5 )、- 12 .82 %和 3.33% ;A/P分别提高 4 .0 9%、7.73%和 0 .4 5 % ;NH3 -N含量分别提高 13.98%(P <0 .0 5 )、5 .38%和 - 9.6 8% ;AAN含量分别提高 1.2 8%、- 32 .6 9% (P <0 .0 5 )、8.33%。MCP在整个过程中没有显著变化。血液中NH3 -N在第二、第三、第四阶段分别升高 - 19.70 % (P <0 .0 5 )、6 7.4 2 % (P <0 .0 1)、- 9.85 % ;AAN分别提高 0 .4 0 %、37.6 5 % (P <0 .0 1)、8.37% ;SUN分别下降 3.4 4 %、6 .0 5 %、15 .4 8%。阶段性相继饲喂CS87、F89和CIM在一定程度上提高瘤胃发酵和氮代谢 ,促进体内对氮的吸收和利用

EFFECT OF CS87,F89 AND CIM SUPPLEMENTED IN DIET CONSECUTIVELY ON THE RUMENMETABOLISM OF GOATS

Five castrated male goats with permanent rumen fistulae,fed with dry peanut seedling and concentrated feed,were used to study the effect of CS87 (15mg/kg.BW.d),F89(2mg/kg) and Cimaterol (8 mg/kg)supplemented consecutively in diet on the rumenmetabolism.Compared with those of control stage,at the end of CS87,F89,CIM experimental stages,the concentration of TVFA of the rumen liquid increased by 17.47%(p<0.05),-12.82%,3.33%,-32.69%and 8.33%,respectively.The concentration of MCP of the rumen liquid has no significant change among 4 stages.However,the blood concentration of NH 3-N,at the end of CS87,F89,CIM experimental stages,increased by-19.70%(p<0.05),67.42%(p<0.01),-9.85%;and AAN by 0.4%,37.65%(p<0.01),and 8.37%.Whereas,SUN decreased by 3.44%,6.05% and 15.48%,respectively.The results indicate that CS87,F89 and Cimaterol supplemented in diet consecutively improve rumen fermentation and nitrogen metabolism to certain extent;in turn,they enhance absorbability and utilization of nitrogen in vivo.