牛尾毛中稳定性碳同位素组成变化规律研究.doc

《牛尾毛中稳定性碳同位素组成变化规律研究.doc》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、牛尾毛中稳定性碳同位素组成变化规律研究郭波莉，魏益民，潘家荣（中国农业科学院农产品加工研究所/农业部农业核技术与农产品加工重点实验室，北京100094）摘要：【目的】研究牛尾毛中稳定性碳同位素组成随饲料改变的变化规律，确证牛尾毛一旦长成，其中的稳定性碳同位素不再与其它部分的进行交换，每段毛发记录的同位素信息可反映毛发生长时的饲料信息。【方法】设计控制饲料配比的牛模型试验，利用同位素比率质谱仪测定不同段位牛尾毛中的δ13C值，分析不同段位牛尾毛的δ13C值随饲料改变的变化趋势，以及牛尾毛中的δ13C值与饲料、牛个体的关系。【结果】随着牛生育过程中饲

2、料成分的改变，不同段位牛尾毛中碳同位素组成有极显著差异，而且饲料对牛尾毛中碳同位素组成的影响远大于个体对其的影响；分段取得的牛尾毛δ13C值与其饲料δ13C值、C4植物饲料比例呈极显著相关（P＜0.01），而不分段的牛尾毛δ13C值与饲料碳同位素组成相关性不显著。【结论】牛尾毛一旦长成，其中的稳定性碳同位素不再与其它部分进行交换，每段毛发的同位素信息可反映牛在毛发生长时的饲料信息，牛尾毛可以看作是记录牛饲料改变信息的档案库。关键词：牛；牛尾毛；追溯；稳定性碳同位素StudyontheChangingLawofStableCarbonIsotope

3、CompositioninCattleTailHairGUOBo-li,WEIYi-min,PANJia-rong(KeyLaboratoryofAgriculturalNuclearTechnologyandAgro-FoodProcessing,MinistryofAgriculture/InstituteofAgro-FoodScience&Technology,ChineseAcademyofAgriculturalSciences,Beijing100094)Abstract:【Objective】Tostudythechangingl

4、awofstablecarbonisotopecompositionincattletailhairwiththechangeoffeedscomposition,andtoverifyeachsectionofcattletailhaircan’texchangewithothersectionsonceitisproduced,anditcontainsisotopicinformationwhichcanreflectthecattlefeedsinformationfromthetimewhenitisproduced.【Method】T

5、heexperimentofcattlemodelwasdesignedbychangingthefeedscomposition,thechangedtrendsofδ13Cvaluesindifferentsegmentofcattletailhairwiththechangeoffeedscompositionwereanalyzed,andtherelationofstablecarbonisotopecompositionbetweencattletailhair,feedsandindividualwereanalyzed.【Resu

6、lt】Therewasaverysignificantdifferencebetweenstablecarbonisotopecompositionindifferentcattletailhairsegmentswiththefeedscompositionchanged,andthefeedshadmoreeffectsoncarbonisotopiccompositionofcattletailhairthanindividual.Thesignificantcorrelationswereshowedbetweenδ13Cvaluesof

7、cattletailhairsegmentandfeeds,andtheyweresignificantlycorrelatedwiththeproportionofC4plantoffeeds,buttherewerenosignificantcorrelationsbetweenδ13Cvaluesofwholecattletailhairandfeeds.【Conclusion】Eachsectionofcattletailhaircan’texchangewithothersectionsonceitisproduced,anditcon

8、tainsisotopicinformationwhichcanreflectthecattlefeedsinformationfrom