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Physiologicalandenvironmentalstressors,suchassicknessandweatherFormoreinformationonbeefcattlewaterrequirements,refertoMississippiState UniversityExtensionServicePublicationBeefCattleWaterBeefCattleNutrientRequirementsNutrientsRequiredbyBeefCattleBeefcattlerequirenutrientsto supportbodymaintenance,reproduction,lactation,andgrowthbeefcattleatdiferentstagesoflifeExplainhowabalancedandcost-efectivenutritionprogramis essentialtothesuccessofanybeefcattleProvidetablesthatlistthenutrientrequirementsofoperationMeetingthebasicnutrientrequirementsofbeefcowsisa keycomponentofmeetingcowherdproductionandprofitabilitygoalsforthebeefcattleenterpriseGrazingandfeedexpensesmakeupabout%to1,Beefcattle requirementsforvitaminAare,IU/lbIU/lbdrydryfeedforbeeffeedlotcattle;feedforpregnantbeefheifersandcows;and1,IU/lbdryfeedforlactatingcows andbreedingbullsBeefcattleneedwater,protein,carbohydrates,fats,minerals,andvitaminsThefollowingtablesofbeefcattlenutrientrequirementsalongwith forageanalysisofpastureandhaycropsproducedonthefarmwillenablethelivestockmanagertoevaluateimprovementsneededinforageandlivestock managementanddevelopoptimalsupplementalfeedingstrategiesfortheiranimalsIntroduction.Ofthesenutrients,theyrequirewaterinthegreatestamountsdaily. DrypregnantNutrientsRequiredbyBeefCattleBeefcattlerequirenutrientstosupportbodymaintenance,reproduction,lactation,andgrowthVitaminDis synthesizedbybeefcattleexposedtosunlightorfedsun-curedforagesThenutritionalneedsofbeefcattlevarybyage,class,stageofproduction,performance level,andweightThenutritionalneedsofbeefcattle1dayago Metabolizableprotein(MP) Itrepresentsthetotalamountproteinabsorbedbytheanimal,and itissuppliedbythediet(RDPandRUP),microbialCP(MCP)andtoamuchlessextent,endogenousCPMicrobialcrudeprotein(MCP) Themostimportant proteinsourceforcattle,supplyingfrom%to%ofthedailyMPrequiredbythe•DiscussthenutrientrequirementsofbeefcattleBeefcattleneedwater,protein, carbohydrates,fats,minerals,andvitamins.AdequatenutritionNutrientrequirementsformaturebeefcows.Physiologicalandenvironmentalstressors,suchas sicknessandweather,canalsoimpactnutritionalrequirementsThenutritionalneedsofbeefcattlevarybyage,class,stageofproduction,performancelevel,and weightBodyAvgDryDailyMatterCrudeCrudeTDNTDNGainIntakeProteinProtein%lbsCa%P%lb%lblblbBeefCattleNutritionWorkbook 5AnimalNutrientRequirementsChapterTableNutrientrequirementsforgrowingandfinishingcattle(nutrientconcentrationinThebasicchargewasto updatetheseventhrevisededi-tionoftheNutrientRequirementsofBeefCattle,whichwaspublishedinandtheUpdatebyreviewingtheProducersshould(1) water,(2)protein,(3)carbohydrates,(4)fats,understandanimalandthethenutrientdigestiverequirementssystemoftheofruminantclassesofbeefCattlehavea dailyrequirementforacertainquantityofspecificnutrientssuchasprotein,calciumandvitaminAThenecessaryconcentrationofthesenutrientsinthediet(to Meetingthebasicnutrientrequirementsofbeefcowsisakeycomponentofmeetingcowherdproductionandprofitabilitygoalsforthebeefcattleenterprise. Adequatenutritionisvitalforadequatecowreproduction,cowandcalfhealth,andgrowthofallclassesofcattleThebasicchargewastoupdatetheseventh revisededi-tionoftheNutrientRequirementsofBeefCattle,whichwaspublishedinandtheUpdatebyreviewingthescientificliteratureonthenutritionofbeef cattleforalllifephasesandtypesofproductioncanalsoimpactnutritionalrequirements