CAJ | 학술논문

为了探讨不同生产期对澳美后代（即用澳美公羊授精鄂尔多斯细毛羊母羊所产羔羊）初生重的影响,该试验选取400只基础母羊,随机分为4组（全部试验羊的日粮水平及饲养管理条件均相同）,分别在不同月份授精,待妊娠母羊产羔后,记录其初生重。结果发现,2009年1、2、3、4月妊娠母羊所产单羔的平均初生重依次为（4.81±0.51）、（4.30±0.68）、（3.95±0.70）、（3.98±0.47）kg,双羔的平均初生重依次为（4.03±0.85）、（3.08±0.24）、（3.08±0.53）、（2.87±0.40）kg;2010年1、2、3、4月妊娠母羊所产的羔羊单羔平均初生重分别为（5.43±0.63）、（4.63±0.55）、（4.60±0.73）、（4.54±0.63）kg,双羔的平均初生重分别为（4.10±0.48）、（3.30±0.94）、（3.28±0.68）、（3.10±0.18）kg。由此可见,澳美后代羔羊的初生重与生产期有密切关系,1—4月出生的澳美后代羔羊的初生重呈下降趋势,其中,1月出生的羔羊其初生重均高于2、3、4月出生的羔羊,且每年1月与4月出生羔羊的初生重差异均显著（P〈0.05）。
위료탐토불동생산기대오미후대（즉용오미공양수정악이다사세모양모양소산고양）초생중적영향,해시험선취400지기출모양,수궤분위4조（전부시험양적일량수평급사양관리조건균상동）,분별재불동월빈수정,대임신모양산고후,기록기초생중。결과발현,2009년1、2、3、4월임신모양소산단고적평균초생중의차위（4.81±0.51）、（4.30±0.68）、（3.95±0.70）、（3.98±0.47）kg,쌍고적평균초생중의차위（4.03±0.85）、（3.08±0.24）、（3.08±0.53）、（2.87±0.40）kg;2010년1、2、3、4월임신모양소산적고양단고평균초생중분별위（5.43±0.63）、（4.63±0.55）、（4.60±0.73）、（4.54±0.63）kg,쌍고적평균초생중분별위（4.10±0.48）、（3.30±0.94）、（3.28±0.68）、（3.10±0.18）kg。유차가견,오미후대고양적초생중여생산기유밀절관계,1—4월출생적오미후대고양적초생중정하강추세,기중,1월출생적고양기초생중균고우2、3、4월출생적고양,차매년1월여4월출생고양적초생중차이균현저（P〈0.05）。
In order to research the effect of different production period on the birth weight of Australia merino offspring(the lamb who Australian merino ram fertilization Ordos fine wool sheep ewes),four hundred pregnancy ewe were selected and randomly divided into four groups.Four groups of sheep ewes were impregnated in different months,and then the lamb birth weight after pregnancy ewe production was recorded.The results showed that the average birth weight of single lamb which was born in January,February,March and April in 2009 were(4.81±0.51),(4.30±0.68),(3.95±0.70) and(3.98±0.47)kg,while the double lambs were(4.03±0.85),(3.08±0.24),(3.08±0.53) and(2.87±0.40)kg,respectively.The average birth weight of single lamb which was born in January,February,March and April in 2010 were(5.43±0.63),(4.63±0.55),(4.60±0.73) and(4.54±0.63)kg,while the double lambs were(4.10±0.48),(3.30±0.94),(3.28±0.68) and(3.10±0.18)kg,respectively.Thereby,there was close relationship between birth weight and production period for Australia merino offspring.There was a decrease of birth weight for Australia merino offspring from January to April,among them the birth weight of lamb which was born in January was higher than that of lamb which was born in February,March and April,and there were significant difference in the birth weight of single lamb and double lambs which were born in January and April of each year(P 0.01).