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ID:32232622
大小:1.86 MB
页数:59页
时间:2019-02-01
《uht纯牛奶长期贮存和酸奶制作后对cla含量的影响》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、摘要本论文主要研究了添加CLA功能料对高产奶牛的影响、UHT纯牛奶长期贮存和酸奶制作后对cLA含量的影响。同时对相关的结果进行了分析、探讨并提出自己的建议。本论文分三个试验进行深入研究:试验一选择体重、泌乳天数以及产奶性能相近的经产(以第三胎为主)和头胎荷斯坦奶牛共127头,按经产和头胎分为2组,分别饲喂添加了cLA功能料的TMR日粮,试验结果表明cLA功能料对经产和头胎高产奶牛的生产性能影响差异不显著(P>O.05)。但是试验结果表明添加cLA功能料能显著提高牛奶中的cLA含量(P2、料和牛奶脂肪酸成分分析得出牛奶中的cLA合成主要靠饲料中的c18:2、c18:3提供。试验二UHT奶试验采用完全随机试验,以不同采样日期和室温贮存时间作为试验处理。结果表明硼T奶近六个月的贮存对总cLA和cis-9,缸ans.1lcLA含量几乎没有影响(P>O.05),但能显著降低tr托s.10,cis.12cLA的含量(P3、率有一定的影响。发酵剂1在85℃、15s加工处理时总cLA和cis.9,tr髓s.11cLA含量差异不显著(P>0.05),同时发酵剂2在85℃、15s、95℃、5min加工处理时总的CLA和cis.9,Ⅱ锄s.11cLA含量差异不显著(P>O.05)。酸奶在培养5h时的总CLA和cis-9,拄aIls.11CLA含量降到最低而24h恢复原先的水平,这点也表明细菌能轻微的合成CLA能力。关键词:CLA功能料;生产性能;贮存时间;酸奶制作;CLAABSTRACTTheⅡ玳eexpe曲lentswereconductedtos伽ymemilkfanyacid4、composition.ExpI:127herdHi曲-yieldHolstcinlacta恤gc0Wsw眦selectedandwcrearrangedtwotreatInems(eg.deliVercdco哪卸dp豳liparitycows),TheHigh·yieldHolsteinlactatingda酊cowsdietsupplementedCLA—fbcd.TheresIlltsho、ved廿Iatmill【producdonw船littlesignificant(P>O.05)betw∞n跚pple删onCLA—feedandordinar5、y‰d.However,II吐akewasch姐gedbyCLA—feed,especially,deliveredcows’ifltakew觞decre踮ed,蛐dprimip“tycow、v晒increas酣sli曲ny.BmsupplemeIl诅tioncLA-feedcallsigm丘cantincre船ecLAcomentinmilk(P6、IIliucwererandomly船signedt0twotrealllnents(eg.diff柏lts锄1plingdmealldfoomtempera枷陀Long—stor89etime)谢tllacompletcly啪d锄izeddesign.111efcsultshowed抽attotalCLAaIldcis-9,衄ls.1lCLAw踮linlesi驴ific锄treduced(P>O.05)喇tllmomteInpera咖℃Long·storage’but啪s一10,cis一12CLAco劬entsigllificantreduced(P《7、0.01)a11dafterdboutonemorlthstoragecan’tfindinmilk_Attlles锄etimewefoundmilk-f甑姐dmilk-proteincontemli砌esigllificalItreduced(P>O.05).ExpⅢ:Milk_航nent、vere锄domly嬲si印edfourtreaIlments(zymogcnl85℃、15sand95℃、5min;zymogen285℃、15s姐d95℃、5min)谢t11acomplctclymndoIIlizeddesi弘.0llrexperimentfo8、unddi彘rentzymogen、temperat脚alldprocessiI
2、料和牛奶脂肪酸成分分析得出牛奶中的cLA合成主要靠饲料中的c18:2、c18:3提供。试验二UHT奶试验采用完全随机试验,以不同采样日期和室温贮存时间作为试验处理。结果表明硼T奶近六个月的贮存对总cLA和cis-9,缸ans.1lcLA含量几乎没有影响(P>O.05),但能显著降低tr托s.10,cis.12cLA的含量(P3、率有一定的影响。发酵剂1在85℃、15s加工处理时总cLA和cis.9,tr髓s.11cLA含量差异不显著(P>0.05),同时发酵剂2在85℃、15s、95℃、5min加工处理时总的CLA和cis.9,Ⅱ锄s.11cLA含量差异不显著(P>O.05)。酸奶在培养5h时的总CLA和cis-9,拄aIls.11CLA含量降到最低而24h恢复原先的水平,这点也表明细菌能轻微的合成CLA能力。关键词:CLA功能料;生产性能;贮存时间;酸奶制作;CLAABSTRACTTheⅡ玳eexpe曲lentswereconductedtos伽ymemilkfanyacid4、composition.ExpI:127herdHi曲-yieldHolstcinlacta恤gc0Wsw眦selectedandwcrearrangedtwotreatInems(eg.deliVercdco哪卸dp豳liparitycows),TheHigh·yieldHolsteinlactatingda酊cowsdietsupplementedCLA—fbcd.TheresIlltsho、ved廿Iatmill【producdonw船littlesignificant(P>O.05)betw∞n跚pple删onCLA—feedandordinar5、y‰d.However,II吐akewasch姐gedbyCLA—feed,especially,deliveredcows’ifltakew觞decre踮ed,蛐dprimip“tycow、v晒increas酣sli曲ny.BmsupplemeIl诅tioncLA-feedcallsigm丘cantincre船ecLAcomentinmilk(P6、IIliucwererandomly船signedt0twotrealllnents(eg.diff柏lts锄1plingdmealldfoomtempera枷陀Long—stor89etime)谢tllacompletcly啪d锄izeddesign.111efcsultshowed抽attotalCLAaIldcis-9,衄ls.1lCLAw踮linlesi驴ific锄treduced(P>O.05)喇tllmomteInpera咖℃Long·storage’but啪s一10,cis一12CLAco劬entsigllificantreduced(P《7、0.01)a11dafterdboutonemorlthstoragecan’tfindinmilk_Attlles锄etimewefoundmilk-f甑姐dmilk-proteincontemli砌esigllificalItreduced(P>O.05).ExpⅢ:Milk_航nent、vere锄domly嬲si印edfourtreaIlments(zymogcnl85℃、15sand95℃、5min;zymogen285℃、15s姐d95℃、5min)谢t11acomplctclymndoIIlizeddesi弘.0llrexperimentfo8、unddi彘rentzymogen、temperat脚alldprocessiI
3、率有一定的影响。发酵剂1在85℃、15s加工处理时总cLA和cis.9,tr髓s.11cLA含量差异不显著(P>0.05),同时发酵剂2在85℃、15s、95℃、5min加工处理时总的CLA和cis.9,Ⅱ锄s.11cLA含量差异不显著(P>O.05)。酸奶在培养5h时的总CLA和cis-9,拄aIls.11CLA含量降到最低而24h恢复原先的水平,这点也表明细菌能轻微的合成CLA能力。关键词:CLA功能料;生产性能;贮存时间;酸奶制作;CLAABSTRACTTheⅡ玳eexpe曲lentswereconductedtos伽ymemilkfanyacid
4、composition.ExpI:127herdHi曲-yieldHolstcinlacta恤gc0Wsw眦selectedandwcrearrangedtwotreatInems(eg.deliVercdco哪卸dp豳liparitycows),TheHigh·yieldHolsteinlactatingda酊cowsdietsupplementedCLA—fbcd.TheresIlltsho、ved廿Iatmill【producdonw船littlesignificant(P>O.05)betw∞n跚pple删onCLA—feedandordinar
5、y‰d.However,II吐akewasch姐gedbyCLA—feed,especially,deliveredcows’ifltakew觞decre踮ed,蛐dprimip“tycow、v晒increas酣sli曲ny.BmsupplemeIl诅tioncLA-feedcallsigm丘cantincre船ecLAcomentinmilk(P6、IIliucwererandomly船signedt0twotrealllnents(eg.diff柏lts锄1plingdmealldfoomtempera枷陀Long—stor89etime)谢tllacompletcly啪d锄izeddesign.111efcsultshowed抽attotalCLAaIldcis-9,衄ls.1lCLAw踮linlesi驴ific锄treduced(P>O.05)喇tllmomteInpera咖℃Long·storage’but啪s一10,cis一12CLAco劬entsigllificantreduced(P《7、0.01)a11dafterdboutonemorlthstoragecan’tfindinmilk_Attlles锄etimewefoundmilk-f甑姐dmilk-proteincontemli砌esigllificalItreduced(P>O.05).ExpⅢ:Milk_航nent、vere锄domly嬲si印edfourtreaIlments(zymogcnl85℃、15sand95℃、5min;zymogen285℃、15s姐d95℃、5min)谢t11acomplctclymndoIIlizeddesi弘.0llrexperimentfo8、unddi彘rentzymogen、temperat脚alldprocessiI
6、IIliucwererandomly船signedt0twotrealllnents(eg.diff柏lts锄1plingdmealldfoomtempera枷陀Long—stor89etime)谢tllacompletcly啪d锄izeddesign.111efcsultshowed抽attotalCLAaIldcis-9,衄ls.1lCLAw踮linlesi驴ific锄treduced(P>O.05)喇tllmomteInpera咖℃Long·storage’but啪s一10,cis一12CLAco劬entsigllificantreduced(P《
7、0.01)a11dafterdboutonemorlthstoragecan’tfindinmilk_Attlles锄etimewefoundmilk-f甑姐dmilk-proteincontemli砌esigllificalItreduced(P>O.05).ExpⅢ:Milk_航nent、vere锄domly嬲si印edfourtreaIlments(zymogcnl85℃、15sand95℃、5min;zymogen285℃、15s姐d95℃、5min)谢t11acomplctclymndoIIlizeddesi弘.0llrexperimentfo
8、unddi彘rentzymogen、temperat脚alldprocessiI
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