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1、中药添加剂对高温环境鸡耐热力的影响Becausethebodytemperatureishigh(40~43DEGC),themetabolismisvigorous,theskinhasnosweatglandsandiscoveredwiththickfeathers.Therefore,thehightemperaturehasabadinfluenceonthelayinghens.Theresultsshowedthatthelayingrateoflayinghensinheatstressdecreasedby10%~38%,andth
2、emortalityrateincreasedobviously.Toimprovetheheatresistanceofchickensinhotenvironmentisanimportantmeasuretoimprovetheproductionlevelandreducethelossofchickens.Modernmedicinethinksthatheatstressisanonspecificdefensiveresponseofthebodytoheatsource,isthehypothalamicpituitarythyroi
3、daxisandhypothalamicpituitaryadrenalaxis,hypothalamuspituitarygonadalaxisdysfunctionsyndrome.Infact,heatstressistheexhaustionofthebody'shightensionandfatigue,whichisverysimilartothekidneydeficiencysyndromeintraditionalChineseveterinarymedicine.Themainpurposeofthisexperimentisto
4、layerastheresearchobject,toexploretraditionalChinesemedicineadditiveontheeffectofhightemperatureenvironmentinheattolerancefromchickenfeedintake,eggproduction,mortality,immunity,bloodbiochemicalindicesandorgandevelopmentandsoon,toimprovethescreeningheattoleranceandproductivityof
5、theprescriptionoflayinghens,providethebasisforheattoleranceandtoimprovetheproductivityofChineseherbaladditivelayerbyhightemperatureenvironment.Thesourceandgroupyz.ag365yz.ag365in1yz.ag365yz.ag365ofthe1.1materialsandmethodsinthemanagementoftheyz.ag365yz.ag365feedingchickensinthe
6、farmofNorthwestAgricultureandForestryUniversitywithahenhouselayinghens,52weeksoldwereselectedNickred200layinghens,wererandomlydividedinto5groups(n=40).Table1thecompositionandnutritionofthebasaldietofthetestchickenisshownintable1.A,B,Cgroupswereadded1.5%,0.8%,0.4%~40crushed60mes
7、hsieveandtraditionalChinesemedicineadditivemixture(gypsum,RhizomaCorydalis,RadixAstragali,epimedium,psoraleafruit,Chineseyam),Dgroupaddedgrinding,mixingmedicine(KCl,NaHCO3,sodiumsalicylate,VC),groupEasthecontrolgroup,onlyfedthebasaldiet.After1weeksoftrial,theformaltest(40d)wasc
8、arriedout.Duringthetest,theaveragetemperatureof30.16~3