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1、作物栽培学试题2Fillintheblanks(0.5centsperspace)1.accordingtotherequirementofdifferentwheatvarietiestolowtemperature,theycanbedividedintowintervarieties,springvarietiesandsemiwintervarieties・2.graindrymatterfrom20%carbohydratestoredinvegetativeorgansbeforeflowering,after
2、flowering80%fromthemanufacturingofphotosyntheticproducts・3.70%ofthenitrogeninwheatgraincomesfromtheremobilizationofstorednitrogenbeforeanthesis,and30%fromthepostanthesisabsorption.4.highqualitywheatfordoughstabilitytimelevelformorethan10points,twopointsformorethan
3、7,weakglutenwheatrequiredvalueislessthanorequalto2.5points・5.the5internodeelongationofrice,thefirstbuddifferentiationstagethejointingperiodcoincidedwiththespikedifferentiation;pollenmothercellmeiosisatbootingstagecoincidedwiththespikedifferentiationduringmitosis・T
4、hecurrent6.growthregulatorinriceproductioniswidelyusedinPaclobutrazol,suitableforapplicationoftheperiodofseedlingstageforleaftothetwoleaf.7.theIongevityofriceleavesincreasedgraduallywiththeincreaseofleafposition,inwhichthelongestlifespanofflagleaf・7.themainusesofs
5、weetpotatoinclude:food,feedandindustrialrawmaterials・8.thewaterrequirementofsweetpotatoisdroughttoleranceandwaterlogging・9.cornwaterrequirementreferstotheamountofcorninthelifeofsoilevaporationandplanttranspirationwaterconsumption(includingprecipitation,irrigationw
6、aterandgroundwater);everyproductionwaterconsumptionofmaizeseedlkgabout0.6m3・10.,the6growingareasofMaizeinChinaarethespringmaizeareainnorthernChina;thesummersowncornareaintheHuangHuaiHaiPlain;thesouthwestmountaincornarea;thesouthernhillyarea;thenorthwestirrigatedco
7、rnarea;theTibetanPlateaucornarea・11.usually,theratioofproductionper100kgcorngrainnitrogen,phosphorusandpotassiumtoalargenumberofelementsis2.5(kg):1(kg):2.5(kg)-nounitwrong;totalaccumulationinmaizegrainsofthethreeelementsaboutretransporting60%fromtheearlyaccumulati
8、onofvegetativeorgans,aboutbythelate40%rootabsorption・ThehighestyieldofSpringMaizeinthe13.worldis23222kghm-2;summercornis16444kghm-2.Two,Janeanswer(40poi
