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1、第二章、食品冷加工技术教学目标：使学生掌握常见的解冻方法和真空冷冻干燥方法。教学要点：1、空气解冻和水解冻。2、真空冷冻干燥原理。教材及相关参考文献whilethelawnisstillinagreatstageoflifeactivities,comparedwiththeprevioustwoperiods,lawnwaterrequirementsincreaseatthisstage,ifnottimelyirrigation,notonlyaffectthegrowthofgrass,alsocausesyellow.Atthisstage,accordingt
2、o4-5ofirrigation.Inshort,grasstypes,waterrequirementsaredifferent,youmustAccordingtotheclimateconditionsandplantspeciestodetermineirrigationofthelawn.Aboutaday,whenirrigationisbetterdependsonirrigation.Intheory,thesameperiodaslongastheamountofirrigationwaterislessthantheinfiltrationcapaci
3、tyofthesoil,irrigationallthetimeinaday.Thendependsontheirrigationway.Ifintermittentintermittentsprayorsprayirrigation(highdegreeofatomization),irrigationisbestwiththeSun.Notonlycanaddmoisture,butalsosignificantlyimprovethemicroclimateandphotosynthesisandtranspirationandgasexchange,facilit
4、atedthecoordinationofwater,air,fertilizerandsoilthermalandvegetativeorgansofrootandrootexpansion,andcouldleadtheentiretransitstorageoftheplantmaterial,breathing,lawnsandlush.Ifusingwater,irrigation,andsoon,shouldbewatchingseason,earlyspring,lateautumnaroundtheheelaswellandtheresttaketwili
5、ghtasmuch.(2)irrigationirrigationquantityshouldbebasedonthesoil,growing,grassandotherfactorstodetermine.Generallawngrowingseasondroughtperiod,takesaboutaweektopay20-40mm;vigorouslygrowinglawnintheheatandseveredroughtsituations,needtopay50-60mmperweekormore.InGeneral,regardlessofthemethod,
6、shouldbeirrigatedmorethanonce,eachtimelesswater,maximumsurfacerunoffthatjustoccurred.2,fertilizingtomaintainlawndarkgreenleaves,grows,portionsmustbefertilized.Lawnplantsforleafgrowthandblossom-freerequirements,sonitrogenismoreimportant,responsetonitrogenfertilizeristhemostobvious.Shouldbe
7、basicapplication1、组织教学：检查出勤人数及假条。（2分钟）2、复习巩固（5分钟）食品的冷却及冻结方法分别有哪些？3、导入新课：上节课，我们学习了食品冷加工技术中的冷却方法与装置、冻结方法与装置，这节课，我们继续学习食品冷加工技术中的解冻方法与装置以及真空冷冻干燥技术。（5分钟）4、新课内容（70分钟）5、强调本课的难点与重点（1分钟）教学难点：真空冷冻干燥原理。教学重点：空气解冻与水解冻。6、总结本课内容（5分钟）7、布置作业（2分钟）whilethelawnisstillinagreatstageoflif
