益生酵母在滩羊日粮中适宜添加量的研究

在精粗比为3∶7的滩羊日粮中,添加不同剂量的益生酵母(0,0.1%,0.3%,0.5%和0.7%)进行了体外批次培养,并应用单项组合效应值(SFAEI)和多项组合效应指数(MFAEI)对中性洗涤纤维(NDF)含量、氨氮(NH3-N)浓度、菌体蛋白(BCP)浓度、pH、产气量和总挥发性脂肪酸(VFA)浓度进行评定。单项组合效应值评定结果表明:NDF含量以添加量为0.1%组高于其他添加组,NH3-N浓度以0.3%组较高,BCP浓度以0.1%和0.3%组较高,pH以0.3%和0.5%组较高,产气量和总VFA浓度均以0.3%和0.7%组较高。多项指标综合评定结果表明:在精粗比为3∶7的日粮条件下,益生酵母在滩羊日粮中的适宜添加量为0.3%。

Study on the appropriate supplementation of dietary Yea-Sacc in Tan Sheep

Different levels of dietary Yea-Sacc were added into a basal diet with concentrate to roughage(C/R) ratio of 3∶7 for the Tan Sheep and done experiments in vitro.The single-factors associative effects indices(SFAEI) and multiple-factors associative effects indices(MFAEI) were used to assess the concentration of NDF,NH3-N and BCP,pH,gas production and the total VFA levels.The assessment with SFAEI showed that the concentration of NDF at supplement of 0.1% was higher than the others,the concentration of NH3-N at 0.3% was the highest,the concentration of BCP at 0.1% and 0.3% were higher than others,pH at 0.3% and 0.5% were the highest,the gas production and total VFA level at 0.3% and 0.7% were higher than others.The assessment with MFAEI showed that the appropriate supplementation of dietary Yea-Sacc for the Tan Sheep was 0.3% with the concentrate/roughage ratio of 3∶7.