Twoconcentrates(MELKandVEM)withtwod

Twoconcentrates(MELKandVEM)withtwodifferentcarbohydratecompositionswere
supplementedduringmilkinginanAutomaticMilkingSystem(AMS).Theobjectivesofthis
studyweretoestimatetheeffectoftheconcentratesonCH4 emissionfromdairycowsandto
investigatetheprecisionoftheCO2-methodwhenmeasuringinanAMSfordifferentlengthof
time. Holsteincows(n¼36)wereusedwithmeanbodyweightof660kg(SD¼75.13)and
averagemilkproductionof31.7kg(SD¼8.98), mixedparityandmixedlactation.Cowswere
allocatedintwogroups(n¼18).Afteranadaptationperiod(period1),eachgroupreceived
either 100%MELK(MoreEnergyLactatingCows; anewlyintroducedfeedingsystem)or100%
VEM (FeedValueSystemformilkproduction)duringperiods2and3.Besides,bothgroups
werefedthesameTotalMixedRation(TMR) ad libitum in thestable.AirsamplesintheAMS
fromapointnearthecowsheadwereanalysedevery20susingtheGasmetequipmentbased
on FourierTransformInfrared(FTIR)SpectroscopyTechnique.Theequipmentrancontinuously
for15daysoverthethreemeasurementperiods(5days3 periods)witha14dayswaiting
time inbetweentheperiods.IndividualrecordsoftheCH4 and CO2 concentrationsinthecows
breathwascalculatedaftersubtractingtheCH4 and CO2 concentrationsinthestableairfrom
the measuredconcentrations.TheCH4:CO2 ratiowasthenmultipliedwiththecalculatedtotal
CO2 productionbytheindividualcowstogetthequantitativeCH4 production.Milkproduction
and totaldrymatterintake(DMI,kg/day)wereverysimilarinthetwogroups.The
supplementedconcentratewasallocatedaccordingtotheindividualmilkyieldandtheintake
rangedfrom1.60to7.30kg/dayinMELKcowsandfrom2.06to7.20kg/dayinVEMcows.No
significantdifferencewasfoundforCH4 productioninMELKandVEMgroupsoverthethree
periods.AlinearpositiverelationbetweentheCH4 (g/day)andenergycorrectedmilk(ECM,
kg/day)productionandthefeedintake(DMI,kg/day)wasobservedfortheentireperiod.The
calculatedCO2 and CH4 productionwereverysimilarinthetwogroupsthroughouttheentire
measurementperiod.TheanalysisoftheprecisionoftheCO2-method,usinga95%significance
level,indicatedthatshowingadifferenceof9or5%inmethaneproductionrequiresa
measuringperiodof5or15days,respectively,whenusing18cowspergroup.Thestudyshows
noeffectofalimitedchangeinsupplementationofstarchandsugaronCH4 production
throughfeedingconcentratesMELKorVEMintheAMS.Toobtainaneffectofchangingthe

ผลลัพธ์ (ไทย) 1:

Withtwodifferentcarbohydratecompositionswere Twoconcentrates (MELKandVEM)supplementedduringmilkinginanAutomaticMilkingSystem(AMS) TheobjectivesofthisstudyweretoestimatetheeffectoftheconcentratesonCH4 emissionfromdairycowsandtoinvestigatetheprecisionoftheCO2-methodwhenmeasuringinanAMSfordifferentlengthofเวลา Holsteincows (n¼36) wereusedwithmeanbodyweightof660kg(SD¼75.13) และaveragemilkproductionof31.7kg(SD¼8.98), mixedparityandmixedlactation Cowswereallocatedintwogroups(n¼18) Afteranadaptationperiod (รอบระยะเวลา 1), eachgroupreceivedทั้ง 100% เมลค์ (MoreEnergyLactatingCows; anewlyintroducedfeedingsystem) or100%VEM (FeedValueSystemformilkproduction) duringperiods2and3 นอกเหนือจาก bothgroupswerefedthesameTotalMixedRation(TMR) ad libitum ใน thestable AirsamplesintheAMSfromapointnearthecowsheadwereanalysedevery20susingtheGasmetequipmentbasedใน SpectroscopyTechnique.Theequipmentrancontinuously FourierTransformInfrared (FTIR)for15daysoverthethreemeasurementperiods witha14dayswaiting (5days รอบที่ 3)เวลา inbetweentheperiods Concentrationsinthecows IndividualrecordsoftheCH4 และ CO2breathwascalculatedaftersubtractingtheCH4 และ CO2 concentrationsinthestableairfrommeasuredconcentrations TheCH4:CO2 ratiowasthenmultipliedwiththecalculatedtotalCO2 productionbytheindividualcowstogetthequantitativeCH4 production.Milkproductionและ wereverysimilarinthetwogroups totaldrymatterintake (DMI กิโลกรัม/วัน) ที่supplementedconcentratewasallocatedaccordingtotheindividualmilkyieldandtheintakerangedfrom1.60to7.30kg/dayinMELKcowsandfrom2.06to7.20kg/dayinVEMcows.NosignificantdifferencewasfoundforCH4 productioninMELKandVEMgroupsoverthethreeรอบระยะเวลา AlinearpositiverelationbetweentheCH4 andenergycorrectedmilk (g/วัน) (ECMกิโลกรัม/วัน) productionandthefeedintake (DMI กิโลกรัม/วัน) wasobservedfortheentireperiod ที่calculatedCO2 และ CH4 productionwereverysimilarinthetwogroupsthroughouttheentiremeasurementperiod TheanalysisoftheprecisionoftheCO2-วิธีการ ความสำคัญ% usinga95ระดับ indicatedthatshowingadifferenceof9or5% inmethaneproductionrequiresameasuringperiodof5or15days, whenusing18cowspergroup ตามลำดับ Thestudyshowsผลิต noeffectofalimitedchangeinsupplementationofstarchandsugaronCH4throughfeedingconcentratesMELKorVEMintheAMS.Toobtainaneffectofchangingthe

ผลลัพธ์ (ไทย) 2:

100% Melk (MoreEnergyLactatingCows; anewlyintroducedfeedingsystem) or100% VEM กินอย่างเต็มที่ใน ระยะเวลา) witha14dayswaiting เวลา inbetweentheperiods.IndividualrecordsoftheCH4 และ concentrationsinthecows CO2 breathwascalculatedaftersubtractingtheCH4 และ concentrationsinthestableairfrom CO2 measuredconcentrations.TheCH4: CO2 ratiowasthenmultipliedwiththecalculatedtotal CO2 productionbytheindividualcowstogetthequantitativeCH4 production.Milkproduction และ productioninMELKandVEMgroupsoverthethree periods.AlinearpositiverelationbetweentheCH4 และ CH4 การผลิตthroughfeedingconcentratesMELKorVEMintheAMS.Toobtainaneffectofchangingthe

ผลลัพธ์ (ไทย) 3:

twoconcentrates ( melkandvem ) withtwodifferentcarbohydratecompositionswere
supplementedduringmilkinginanautomaticmilkingsystem ( AMS ) theobjectivesofthis
studyweretoestimatetheeffectoftheconcentratesonch4 emissionfromdairycowsandto

investigatetheprecisionoftheco2 methodwhenmeasuringinanamsfordifferentlengthof ครั้ง holsteincows ( N ¼ 36 ) wereusedwithmeanbodyweightof660kg ( SD ¼
75.13 ) และaveragemilkproductionof31.7kg ( SD ¼ 8.98 ) mixedparityandmixedlactation . cowswere
allocatedintwogroups ( N ¼ 18 ) afteranadaptationperiod ( period1 ) eachgroupreceived
ทั้ง 100 % เมล ( moreenergylactatingcows ; anewlyintroducedfeedingsystem ) or100 %
องค์การอนามัยโลก ( feedvaluesystemformilkproduction ) duringperiods2and3 นอกจากนี้ กลุ่ม
werefedthesametotalmixedration ( TMR ) อย่างเต็มที่ใน thestable airsamplesintheams
.fromapointnearthecowsheadwereanalysedevery20susingthegasmetequipmentbased
บน fouriertransforminfrared ( FTIR ) spectroscopytechnique . theequipmentrancontinuously
for15daysoverthethreemeasurementperiods ( 5 วัน  3 งวด ) witha14dayswaiting
inbetweentheperiods.individualrecordsofthech4 เวลาและ CO2 CO2 concentrationsinthestableairfrom

breathwascalculatedaftersubtractingthech4 concentrationsinthecows และการ measuredconcentrations . thech4 : CO2 CO2 ratiowasthenmultipliedwiththecalculatedtotal

productionbytheindividualcowstogetthequantitativech4 การผลิต และ milkproduction totaldrymatterintake ( DMI กก. / วัน ) wereverysimilarinthetwogroups .

supplementedconcentratewasallocatedaccordingtotheindividualmilkyieldandtheintake rangedfrom1.60to7.30kg / dayinmelkcowsandfrom2.06to7.20kg /
dayinvemcows .significantdifferencewasfoundforch4 productioninmelkandvemgroupsoverthethree
periods.alinearpositiverelationbetweenthech4 ( กรัม / วัน ( ECM ) , andenergycorrectedmilk
กิโลกรัม / วัน ( DMI ) productionandthefeedintake กก. / วัน ) wasobservedfortheentireperiod .
calculatedco2 และร่าง productionwereverysimilarinthetwogroupsthroughouttheentire
measurementperiod . theanalysisoftheprecisionoftheco2 วิธี usinga95 %
.ระดับ indicatedthatshowingadifferenceof9or5 % inmethaneproductionrequiresa
measuringperiodof5or15days ตามลำดับ whenusing18cowspergroup . thestudyshows

throughfeedingconcentratesmelkorvemintheams.toobtainaneffectofchangingthe noeffectofalimitedchangeinsupplementationofstarchandsugaronch4 การผลิต