施钾量对寒地粳稻不同穗位籽粒淀粉形成积累的影响

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1、万方数据AbstractEf琵ctofPotassiumFertilizerontheStarchAccumulationofJaponicaRiceatDifferentPaniclePositionsinColdRegionHeilongjiangProvinceisthemainlyprovinceinNorthriceofcultivationarea．Itisoneofthemainoriginofhigh-qualityriceandimportantcommoditygrainproductioninotlrcountry．Potassiumisthelargestdeman

2、dnutrientsforprocessonricegrowing．Riceseedgerminationtoharvestnitrogen，phosphorusandpotassiumfromthedemandratioof1：0．5：1．3．Therefore，themostnitrogendemandisthepotassium．However，thesoilissuppliedtothericelittlepotassium．Threejaponicaricevarieties，Dongnong425，Dongnong427andSongjingNo．6，werestudiedby

3、fieldexperimentswithK20ratesasKO(0蝇·ha一1)，K1(25kg·ha"1)，K2(50kg·ha-1)，K3(75kg·ha。1)，K4(100kg·ha‘1)，K5(125kg。hal)andK6(150kg·ha-‘)。toexploretheEffectsofpotassiumfertilizerontheStarchaccumulationofJaponicariceatdifferentpaniclepositionsincoldregion，Inordertoclarifytherelationshipofcanopystructure、fl

4、agleafnitrogenpotassiumratioandstarchaccumulation．EffectsofPotassiumamountofgrainfillingcharacteristicsandyieldofear．InordertorevealtheeffectoftheaccumulationofdifferentlawsandEaramountofpotassiumtotheformationofcoldricegrainstarchandriceproductioninthecoldregionforrationalapplicationofpotashtopro

5、videatheoreticalbasis．Thetestresultsareasfollows：(1)．WiththenumberofdaystopromotefillingeachearthreevarietiesoftotalstarchcontentWasgraduallyincreasing．DongNong425，K3，K4，K5treatedseparatelyinfavoroftheincreaseintheaccumulationoftotalstarchinthelowerpartoftheear．Songjing6，K5treatmentconducivetothea

6、ccumulationoftotalstarchministriesear．DongNong427，K3，K5，respectively，infavorofthedeal，theaccumulationoftotalstarchinthemiddlepartoftheear．Withthenumberofdaysadvancegrout，threevarietiesofeachpartoftheearproportionofstarchaccumulationwasincreasinglineartrend．Potassiumvolumeratioofamyloseaccumulation

7、lessaffectedeachperiod．ThreevarietiesofeachearamylopectinstarchaccumulationvariationwithtotalsameandItsvariationalsovariesbyspecies．Effectofpotassiumonthetotalamountofstarchandamylopectinintheearlyandmiddlefillin