SPF豬飼料滅菌方法的研究.pdf

1、中國農(nóng)業(yè)科學院碩士學位論文SPF豬飼料滅菌方法的研究姓名：楊紅軍申請學位級別：碩士專業(yè)：動物營養(yǎng)與飼料科學指導教師：時建忠20070601Abstract11lispaperconsistsofthreeexp醯aentswhichstudiedtheeffectofsterilizationpf|woonmicroorganismandnutrientcompositionofSPFpigfeedbyradiationmi∞owavc

2、andex佃asioninordertochoosetheappl坤fisteprocesstoprodlleefeedswhichaccordwithSPFpigfeedstandardExperiment咄studiedtherelationbctwllltheresidualcoloniesnumberandtheradiationdosem魄2kGy3kOy4kGy5kGyand6kCy)，andtheeffectsofradi

3、stiondose(0kCy5kCy10kGy15kOy20kGyandZSkOy)andpreservationtime(odays，7day≈14days21day8and28daysaf暗radiation)onsterilizationofSPFfeedTheresultis舔foIlows：(1)11”relationbetwecfltheradiationdoseandbacteriallogarithmormildewan

4、dyeastlogarithmafterirradiationislineal：y=08319x65087_(R2=09958)’y=08928x57199倒=o9673)；(2)1nbeDlovalueofthebacterialandmildewandyeastale120kGyand112kGy(3)Nomicroorganismwasdetectedinthefeedradiatedby15kGywhichinitialbact

5、erialconcentrationis879xl礦cfu／gandthemildewand3a：astis507x105cfu／gandthecoliformis488MPN／1009；(4)Radiationhas110significanteffectsoncrudefatcrudeproteinandgross∞齠科content【肛叮05)，andhassignificanteffectsonwatel“contentandc

6、rudeproteincontent(Pthicknesspowerwatercontent(3)11”bestprocmsisA383C3D3，vizthewatercontenti摹34％，thepoweris700watt，thetimeis9minutes。andthethicknessis12millimeterAtthegametimereducingtimecallbeconsideredInshoftthefeedaft

7、ersterilizationbymicrowavescanaccordwitllSPFpigfeedstandardExperimentthreestudiedtheeffectsofexUusiononsterilizationofpigfeedThetrialweredesignedbysinglefactor(90“C，100“C，lIOC，120“C，130“C，140“(3，150“C，160“C，17012。180℃)te

8、standtheorthogonalizingprocessb(3)：moistmecontent(18％，23％，28％)，feedingrate(isr／min，24r／min，30r／min)，SCTeSVspeed(100r／min，150r／min，200r／min)andbarreltemperature(80“C，120℃，160c)Theresultsareshowedasfollows：(1)Theprocessofe

9、xtrusionhasveryperfecteffectsonsterilizationofpigfeedThecoliform，mildewandyeastwerenotdetectedafterextrudingat80℃andnomicroorganismwasdetectedafterextrudingat90℃(2)111efourdeterminedfactorsallhavesignificanteffects伊o01)∞

10、microorganismofthefeedamongwhichbarreltemperatureisthemoreremarkable(3)n”bestprocessisA282C2132，thatisthemoismrecontentis23％feedingrateis24r／min，SCleWspeedisl50r／minandbarreltemperatureisl20“CInshortproducingSPFanimalfee