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ID:32463024
大小:1.83 MB
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时间:2019-02-06
《两种益生素添加剂对澳系荷斯坦奶牛生产性能和奶样指标的影响》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、新疆农业大学硕士学位论文两种益生素添加剂对澳系荷斯坦奶牛生产性能和奶样指标的影响姓名:邵伟申请学位级别:硕士专业:动物营养与饲料科学指导教师:余雄20080601摘要本试验采取随机分组,将60头年龄、胎次、泌乳期相同,体重和泌乳量接近的澳系荷斯坦奶牛随机分成三组,各组间产奶量差异不显著。随机选择第一组为对照组,不添加益生素添加剂;第二组添加美国达农威公司生产的益康肝;第三组日粮中添加韩国娜尔公司生产的PM发酵剂。其中美国达农威公司生产的“益康XP”主要成份为酵母菌制品,而韩国娜尔公司生产的“PM发酵剂”主要成分为碱性阳离子。‘预试期
2、10天,正式期90天,于正式期开始前一天采取乳样,然后于试验期30天,60天和90天采取乳样待测。每5天测日产奶量,每月数据汇总处理。奶样中分别测量脂肪、蛋白质、乳糖、干物质、挥发性脂肪酸、柠檬酸盐、密度、冰点、体细胞、pH值。.试验结果表明,试验采用的“益康)(P”与“PM发酵剂”益生素添加剂能促进消化代谢,显著提高澳系荷斯坦奶牛采食量(P如.05);试验采用的“益康)(P”与“PM发酵剂”添加剂能显著提高澳系荷斯坦泌乳期奶牛产奶量(P3、ll发酵剂”碱性阳离子类益生素添加剂;“益康冲”能显著提高奶样中蛋白质含量(P<0.05),而“PM发酵剂”对奶样蛋白质含量效果不显著(P>o.05):“益康即一与“PM发酵剂”益生素添加剂对奶样中脂肪、乳糖、柠檬酸盐、挥发性脂肪酸指标影响不显著(P>o。05);“PM发酵剂”益生素添加剂在减少乳房炎发病率,降低奶样体细胞方面,明显优于xP组。关键词:荷斯坦奶牛益生素采食量产奶量奶样指标HAbstracIIlthisstudy,60HolsteindairyCOWatthesameage,birthorderandlactation4、lengIllwererandomlydividedintothreegroups.Andtherewasnodifferen--ceamongthreegroupsinmilkyield.Onegroupwasrandomlyselected∞COil-trolgroupwithoutfeedinganyprobioticspremix.Theo也ergroupfeedXPw-hichWasproductedbyAmericanDianvodVCOmpany.ThelastgroupfeedPMstarter,production5、ofKoreaPMCOmpany.ThemainingredientoftheXPWastheyeastproduction.AndthatofthePMstarterWasalkalicarlo.ThewholetestWasdividedintotwophases,onewaspre-experimentwhichwas10daysandanotheroneWasformalexperimentwhichWasabout90days.Theyweresampledonday10,40,70and100·Determination6、ofmilkproductioneach5day;milkfatpercentage,milkprotein,SoreaticCellCount,density,FreezingpointandpHValueweremeasuredrespectively.Theresultsshowedthat:XPandPMstartercouldpromoteCOWS’digestionandmetabolism.Andfeedintake,milkyieldweresignificantlyincreasedbyfeedingXPandPM7、starter(P如.05).XPastheyeastproductionWasbetterthanPMstarterinimprovingmilkyield,themainingredientwasalkalicarlo.XPcouldsignificantlyincreasemilkproteinff,8、percentage,lactose,citrateandvolatilefattyacidp>o.05).PMstarterwassig畦ficantlybetterthanXPatreducingtheincidenceofmas
3、ll发酵剂”碱性阳离子类益生素添加剂;“益康冲”能显著提高奶样中蛋白质含量(P<0.05),而“PM发酵剂”对奶样蛋白质含量效果不显著(P>o.05):“益康即一与“PM发酵剂”益生素添加剂对奶样中脂肪、乳糖、柠檬酸盐、挥发性脂肪酸指标影响不显著(P>o。05);“PM发酵剂”益生素添加剂在减少乳房炎发病率,降低奶样体细胞方面,明显优于xP组。关键词:荷斯坦奶牛益生素采食量产奶量奶样指标HAbstracIIlthisstudy,60HolsteindairyCOWatthesameage,birthorderandlactation
4、lengIllwererandomlydividedintothreegroups.Andtherewasnodifferen--ceamongthreegroupsinmilkyield.Onegroupwasrandomlyselected∞COil-trolgroupwithoutfeedinganyprobioticspremix.Theo也ergroupfeedXPw-hichWasproductedbyAmericanDianvodVCOmpany.ThelastgroupfeedPMstarter,production
5、ofKoreaPMCOmpany.ThemainingredientoftheXPWastheyeastproduction.AndthatofthePMstarterWasalkalicarlo.ThewholetestWasdividedintotwophases,onewaspre-experimentwhichwas10daysandanotheroneWasformalexperimentwhichWasabout90days.Theyweresampledonday10,40,70and100·Determination
6、ofmilkproductioneach5day;milkfatpercentage,milkprotein,SoreaticCellCount,density,FreezingpointandpHValueweremeasuredrespectively.Theresultsshowedthat:XPandPMstartercouldpromoteCOWS’digestionandmetabolism.Andfeedintake,milkyieldweresignificantlyincreasedbyfeedingXPandPM
7、starter(P如.05).XPastheyeastproductionWasbetterthanPMstarterinimprovingmilkyield,themainingredientwasalkalicarlo.XPcouldsignificantlyincreasemilkproteinff,8、percentage,lactose,citrateandvolatilefattyacidp>o.05).PMstarterwassig畦ficantlybetterthanXPatreducingtheincidenceofmas
8、percentage,lactose,citrateandvolatilefattyacidp>o.05).PMstarterwassig畦ficantlybetterthanXPatreducingtheincidenceofmas
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