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1、扬州大学本科生毕业设计（论文）影响小梅山母猪繁殖性能因素的探讨畜牧兽医专接本08学生姓名：李威指导老师：吴井生摘要：充分发挥小梅山猪的优良繁殖性能对我国养猪业的发展具有重要意义。小梅山母猪在胎次方面，第4胎产仔数最高（16.05±1.83），第13胎最低（11.22±2.59）。20日龄窝重的变化波动很大，第4胎之后各胎次之间存在很明显的差异，第13胎最低（24.21±4.78）；妊娠期方面，妊娠期为112d的与114d、115d、116d均差异显著(P<0.05)，与113d和117d差异不显著(P>0.05）；活仔数方面，116d
2、与112d、117d差异显著(P<0.05)，与其他妊娠期差异不显著(P>0.05）；与配公猪方面，产仔数、活仔数和初生窝重三性状中，各与配公猪之间均差异不显著(P>0.05）；配种季节方面，秋季与冬季在五个性状上均差异显著(P<0.05)。秋季与春、夏两季在产仔数、活仔数两性状上差异不显著(P>0.05）,而在初生窝重、断奶仔猪数和20日龄窝重三性状上差异显著(P<0.05)。关键词：小梅山母猪；胎次；与配公猪；配种季节；妊娠期；产仔数；产仔活数；断奶仔猪数；初生窝重；20日龄窝重。Discussiononthefactorsaff
3、ectingsmallMeishansowreproductiveperformanceStudent:LiWeiTutor:WuJingshengSAbstract:GivefullplaytothesmallMeishanpig'sexcellentreproductiveperformanceinswineindustryinourcountryhasimportantsignificancetothedevelopmentof.Smallmeishansowinparity,fourthlitterthehighestnumb
4、er(16.05±1.83),thirteenthfetalminimum(11.22±2.59).20daylitterweightchangesfluctuategreatly,fourthfetalaftereachparitybetweenexistobviousdifferences,thirteenthfetalminimum(24.21±4.78)；Pregnancy,gestationfor112dand114d,115d,116dweresignificantlydifferent(P<0.05),and113dan
5、d117dhavenosignificantdifference(P>0.05)；Alivepiglets,116dand112d,117dhadsignificantdifference(P<0.05),andotherpregnancydidnotshowsignificantdifference(P>0.05)；Withtheboar,littersize,numberoflivebornandlitterweightatbirthinthreecharacters,eachwiththeboarsarenosignifican
6、tdifference(P>0.05)；Breedingseason,autumnandwinterinfivetraitsweresignificantlydifferent(P<0.05).Inautumnandspring,summertwoseasoninlittersize,livepupsseveralcharactershavenosignificantdifferences(P>0.05),whereasinthelitterweightatbirth,weaningpigletsandlitterweightonda
7、y20ofthreetraitssignificantly(P<0.05).Keywords:smallMeishansows；parity；andcombiningtheboar；breedingseason；gestationperiod；numberoflitter；litterlivefor；weaningpigletslivenumbernumber；litterweightatbirth,；20daylitterweight.he"governingforthepeople","Nomattertheinterestsof
8、themasses"conceptunderstandingisnotinplace.Thespecificworktreatswiththedeployment,afewleadingcadrescomplaintha
