奶牛日糧陰陽離子平衡調(diào)節(jié)及溫?zé)岘h(huán)境評(píng)價(jià).pdf

1、南京應(yīng)鼉戈蓬y940888分類號(hào)嬰!!：2學(xué)號(hào)—200252—0505碩士學(xué)位論文奶牛日糧陰陽離子平衡調(diào)節(jié)及溫?zé)岘h(huán)境評(píng)價(jià)指導(dǎo)教師專業(yè)學(xué)位研究領(lǐng)域研究方向答辯日期姚勤顏墻塞熬援盛些推亡差蕉塞直巫撞三墨曼五生△旦英文摘要ChangingDietaryCationanfionBalanceforDairyCows＆TheEvaluationofThermalEnvironmentABSTRACTWiththemilkproductioninc

2、reasingandtheclimatebecomingwarmerandwarmertheheatstressofdairycowshasbecomemoreandmoreseriousThisthesisstudiestheinflueneeofdietarycationaniondifferenceanditsadministrationtimeonlactationperformancethee肫ctofseasononmiⅡ(

3、productionandtherelationofthermalenvironmentandphysiologicalreaction，hopingthatitcanprovideatheoreticalbasisfordairycowmanagementathotsummerinWnhuandothersouthemareasThisthesisisdividedintothreepartsInthefirstsectionsele

4、ctedHolsteinCOWSwhichwerehealthatmid—lactationandrandomassignedthemintotwogroups，andanalyzedtIleeffectofDCADonlaerationperformanceinSU／／llneKTw0treatmentswereallfedonbasicaldietsupplementing餌)cationsalteverymorningor(A)n

5、oadditivesthecontr01MilkyieldinBincreasedby082％、309％、969％ontheseventh、fourteenth、twenty—firstdayrespectivelyandthedifiefencesbetweengroupsweresignificant(P23)022℃O17℃respectivelyTheeriectivetemperaturecouldbeexpressedbyR

6、RorRTasfollows：RR=01DBT09WBTRT=O34DBT066WBTThisindicatedthatWBThadmoreimportanteffectonRRorRTffiWBTandthecoecientofforhighyielddairyCOWSshouldbeimprovedKEYWORDS：hightemperature；Holsteincows；dietarycationaniondifference；l