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1、?????òμ?§±¨ActaAgriculturaeZhejiangensis12￡¨4￡?￡o209~212￡?2000ìe2???′ù??èa?|éú3¤μ?×÷ó??úàí?D????D?°2￡¨???′ó?§??á????§?D???ù￡????o??Y310029￡??aòa￡o??ó?288óe29è?á?°???òeèa?|￡?°′????ê??éòa?ó·?3é4×é￡¨??×é3?????′￡?￡?·?±e??ò?ìí?óóD0￡?500￡?750￡?1000mg￡ˉkgìe2???μ??àí???á?￡???DD?a?ú21d
2、μ?????ê??é?￡?ú?D??ìe2?????èa?|éú3¤ó°?ìμ??ù′?é?￡?í¨1yíà?×è??ù￡?2a?¨?a???¤??????oí??èao??áo?á?μè??±ê￡?ì?ì?ìe2???′ù??èa?|éú3¤μ?×÷ó??úàí?￡?á1?±í?÷￡?1000mg￡ˉkg?áá?×éD§1?×???￡?è?????ìá??á?7.20%￡¨P<0.05￡?￡?á???±è?μμíá?6.81%￡¨P<0.05￡??￡??×é?ù?·é?ê?·?????±ê·￠éúá??÷??μ?±??ˉ￡????D?a??IGF
3、-I????éy??á?29.09%￡¨P<0.01￡?￡?????°?RNAo?á??°RNA￡ˉDNA±è?ê·?±eéy??á?15.21%￡¨P<0.05￡?oí19.13%￡¨P<0.01￡?￡??a???ò?á?¨?è?μμíá?10.96%￡¨P<0.05￡??￡é?ê??á1?ìáê?￡?ìe2?????×÷ó?óú?ú·??ú?μí3￡?í¨1yìá???a??IGF-I????￡??????úì?μaμ?′￠á?á?￡???2úéú′ù??èa?|éú3¤μ?×÷ó??￡1??ü′ê￡oìe2???￡?èa?|￡?éú3¤￡?ò
4、èμo???ùéú3¤òò×ó?Dí?·?àào?￡oS831.5???×±êê???￡oA????±ào?￡o1004-1524￡¨2000￡?04-0209-04Studiesongrowth-proLotingLechanisLofbetaineinbroilerchickens￡oZHANXiu-an￡¨FeedScienceInsti-tute￡?ZhejiangUniversity￡?Hangzhou310029￡?China￡?Abstract￡oTwohundredandeightyeightAvianfinishingbroile
5、rsallottedtofourgroupsbyweightandsexwereconductedtostudytheeffectsofbetaineongrowthperformanceandtoapproachitsmechanism.Everygroupin-cludedthreereplicatelotsoftwentyfourbirdseach.Thegroupsreceivedthesamebasaldiet￡¨12.34MJ￡ˉkgME￡?19.10%CP￡?0.40%Met￡?0.72%TSAA￡?supplementedwith0
6、￡?500￡?750￡?1000mg￡ˉkgbetainerespec-tivelyduringtheperiodof29to49daysofage.Theresultsofrearingtrialshowedthat1000mg￡ˉkgbetainetreatedgroupwasthemosteffective￡?whichincreasedADGby7.20%￡¨P<0.05￡?andreducedF￡ˉGby6.81%￡¨P<0.05￡?.Datafromsampleanalysisindicatedthatadding1000mg￡ˉkgb
7、etainesignificantlyenhancedIGF-Ilevelby29.09%￡¨P<0.01￡?anddecreaseduricacidconcentrationby10.96%￡¨P<0.05￡?inserum￡?raisedRNAcontentandrationofittoDNAby15.21%￡¨P<0.05￡?and19.13%￡¨P<0.01￡?inbreastmus-cularcellrespectively.Theseresultsimplicatethatsupplementalbetainepromotesgrowt
8、hofbroilersbyinducingIGF-Isecretion￡?furtherimprovingaccumula
