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1、●CT_8仰iaREI叫OU．LTsU洲R％AE華北農(nóng)學(xué)報(bào)·2014，29(2)：199．203長(zhǎng)期定位施肥對(duì)無石灰性潮土鉀素演變的影響溫立玉，宋祥云，劉樹堂，王飛，宋增強(qiáng)(青島農(nóng)業(yè)大學(xué)資源與環(huán)境學(xué)院，山東青島266109)摘要：為了探討不同施肥對(duì)土壤鉀素的變化規(guī)律，基于連續(xù)進(jìn)行36年的長(zhǎng)期定位試驗(yàn)，研究了長(zhǎng)期定位單施氮肥和有機(jī)肥配施氮肥對(duì)無石灰性潮土全鉀及不同形態(tài)鉀的含量影響。結(jié)果表明：連續(xù)單施高量氮肥與對(duì)照相比水溶性鉀降低了0．09mg／kg，交換性鉀降低了16．34mg／kg，速效鉀降低了3．61mg／kg，緩效鉀降低了12．3mg／kg，全鉀降低了2
2、．1g／kg。而長(zhǎng)期高量有機(jī)肥配施低量氮肥與對(duì)照相比，水溶性鉀增加了1．28mg／kg，高量有機(jī)肥配施高量氮肥與對(duì)照相比，交換性鉀增加了27．22mg／kg；而單施有機(jī)肥、有機(jī)肥配施氮肥土壤速效鉀、緩效鉀和全鉀的含量均呈增加趨勢(shì)。土壤速效鉀與有機(jī)質(zhì)和陽(yáng)離子代換量顯著相關(guān)。這表明長(zhǎng)期單施氮肥不利于土壤各形態(tài)鉀素及全鉀的積累，單施有機(jī)肥或有機(jī)肥配施氮肥有利于提高無石灰性潮土中各形態(tài)及全鉀的含量。關(guān)鍵詞：長(zhǎng)期定位施肥；無石灰性潮土；鉀素演變；鉀素形態(tài)中圖分類號(hào)：S147．3文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1000—7091(2014)02—0199—05EfectofLo
3、ng-termFertilizationonDynamicsofPotassiuminNon·-calcareousFluro--aquicSoilWENLi—yu，SONGXiang—yun，LIUShu—tang，WANGFei，SONGZeng—qiang(CollegeofResourcesandEnvironment，QingdaoAgriculturalUniversity，Qingdao266109，China)Abstract：Inordertoinvestigatethevariationofdifferentfertilizationon
4、soilpotassium，theeffectoflong—termfertilizationofnitrogen(N)organicmanure(M)ormanurewithnitrogen(MN)ontheamountsoftotalpotassiumanddiferentformsofpotassiuminnon—calcareousfluro—aquicsoilwasstudiedbasedon36yearsoflong—termexperiment．Theresultsshowedthattheamountsofpotassiumdecreased
5、withlong-termfertilizationofhighrateofnitrogen(N2)fertiliz-er，comparedtocontroltreatment(CK)thewatersolublepotassium，exchangeablepotassium，availablepotassium，non-exchangeablepotassiumandtotalpotassiumweredecreasedfor0．09mg／kg，16．34mg／kg，3．61mg／kg，12．3mg／kg，2．1kg，respectively．Compar
6、edtocontroltreatment(CK)，theincreaseinwatersolublepotassiumWas1．28mg／kgandex-changeablepotassiumwas27．22mg／kgforhighrateoforganicmanure(M2)withlowandhighrateofnitrogen(NlorN2)．However，theavailablepotassium，non—exchangeablepotassiumandtotalpotassiumRendedtoincreasewithcontinuefertil
7、ization．TheavailablepotassiumWascorrelatedtosoilorganicmatter(SOM)andcationexchangecapacity(CEC)．ItsuggeststhattheMorMNfertilizerisgoodforincreasingdifferentformsofpotassiumandtotalpotassiuminnon—calcareousfluro—aquicsoil，butnotthefertilizationofsingleNfertilizer．Keywords：Longtermf
8、ertilization；Non-calcareou
