寒冷環(huán)境對(duì)荷斯坦奶牛生化指標(biāo)及生產(chǎn)性能影響的研究.pdf

1、黑龍江八一農(nóng)墾大學(xué)碩士學(xué)位論文寒冷環(huán)境對(duì)荷斯坦奶牛生化指標(biāo)及生產(chǎn)性能影響的研究姓名：孫亞波申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：動(dòng)物營(yíng)養(yǎng)與飼料科學(xué)指導(dǎo)教師：苗樹君20050601AbstractAsthecaⅢebammadeofsteelplatesbeeomesmorepopuIarinHeiLongjiangprovince，butnobiochemicalindicatorsofdai叫c叭1emt11iskjndofbamhavebeenp

2、rovidedThestudywaSaimedatfmdingthee肫ctofcoJdenVifof珊ent徹biochemicalindicatorsa11dtheperfomaflceofdajryCattk()nehundredandfortyHolsteinswasdiVidedimosixgroupsaccordjngtothediffbrentoutdoortemperatIlre(160℃、20℃、25℃、100℃、14

3、O℃、一190℃)a11dwererespectivelyn唧edgroupI，If，IiI，Ⅳ，V，ⅥBJooda11dmiIkwassampledineverygroup(n=20)，atthes哪etimet|letempe咖reaIldmoistureweredetemlinedint11ebarnIn1aboratorysemmandwheyw船made行ombloodaIldmi墩and12biochemicalindica

4、torsweretestedTheresultsshowed：1ThelevelofTPinse九lmsign訊c神tIyincreased(p005)asthetemperaturesdecre孫ed，butthelevelofTPinwheysignificantlydccreased(p005)2ThelevelofAU3insemmwasreduceda5tlletempemturesdecreased，comparedwitl

5、ltllecon仃oItcmpe咖e(16℃)，theconcen廿nionofALBwasfoundtobesign嫡c肌tlydecreased(p005)attemperatureof2O℃；inwheyitchangedin弓gularly3111econcentmtionofBuNandt王1eactVhyofALTandASTinsemmWeresi印ific觚tlyincreaSing(p005)行om160℃to20℃；

6、仃om20℃to一10O℃r10significantchlgewasobservaed；whiletllethreebiochemicalindicatorscomentbegantodecreasebelow一10O℃thecontentofBUNsi鰣矗c鋤tlyincreased(po05)納m16o℃to2o℃i11whey，menfluctuated啡iceatIastgotthnomalValuenleactiV塒ofAL

7、T肌dAsTinwheysi咖fic舭tlydecreased(p005)whenthetemperatLlreSdecre嬲ed4Asthetemperamresapproachedtot11emiIima’levelsofGluinsemmincreased，whenit、Ⅳas一25℃tlleIevelofG1ugottk5ummt柚dthenmaintainmjsleveluntll—19O℃LevelsofGlunwhqflu

8、ctlIatedatimeⅣaltemperaturc，andt11emamch鋤gingdirectionwasdecre觴ing(p005)5TheactiVjfyofLDHs劬ificant】yincreased(p005)both抽s啪mandwhey，butasuddendecreaSingwasfourIdvmenitwas一100℃insemm6TheactivityofCKshowedadistiIlc們ydecreas

9、ing(p005)withmetem盧eratIlredecreasedinsenlm肌d90tt王lelowestat14O℃；f而m16O℃t02O℃，t11eactivityofCKsignificantlydecreasedaIldtllenincre叢eduntil，190℃butfor一140℃7LeVelsofCHoi玎egul盯lynuctLIatedasthetemperaturedecreasedbOthinsemm

10、aIldwhey8工owtemp哪turessi盟mcantlyreduced(pO05)theconcemra廿onofCainser啪如m16O℃柏～19O℃；whiletheconcentrationofPne州ydjdnotchangcbetween16O℃t02O℃，al一25℃ilbegalltodecreasethenasharplyincreasingwasfoundf而m10O℃to—190℃(pO05)insenlm

11、1nwheytheconcen仃ationofCadecreaseda|IdPincreasedasthetemperanlresapproachedtotheminima9Theactivi可ofALPwasfoundtobes嚕nincaIItlydecreasingf吣m160℃to25℃insemmandt11ennosignmcantchallge、相sobserved；ttleactiVityofAUlwasfourldto