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1、萬方數(shù)據(jù)作物學(xué)報ACTAAGRONOMICASINICA2012,38(3):487-494ISSN0496—3490;CODENTSHPA9http://www.chinacrops.org/zwxb/E—mail:xbzw@chinajournal.net.cnDoI:10.3724,sP.J.1006.2012.00487施鉀方式對棉花葉片抗氧化酶活性、產(chǎn)量及鉀肥利用效率的影響李宗泰陳二影張美玲趙慶龍許曉龍姬紅宋憲亮4孫學(xué)振4山東農(nóng)業(yè)大學(xué)農(nóng)學(xué)院,作物生物學(xué)國家重點(diǎn)實驗室,山東泰安271018摘要:在大田試驗條件下,以魯棉研28為試驗材料,研究不施鉀HE(CK)、一次性基施
2、硫酸鉀(T1)、分次(1/2基施,l/2于花鈴期追施)施用硫酸鉀(T2)、一次性基施控釋復(fù)合肥(T3)4個處理的棉花葉片保護(hù)酶活性、產(chǎn)量及鉀肥利用效率變化。結(jié)果表明,與不施鉀處理相比,施鉀可顯著增加葉片葉綠素、可溶性蛋白含量,降低MDA含量,提高SOD、CAT活性(葉齡30、45、60d),降低POD活性(葉齡30、45d),提高籽棉產(chǎn)量和皮棉產(chǎn)量;與一次性基施硫酸鉀和控釋復(fù)合肥相比,分次(1/2基施、1/2花鈴期追施)施用硫酸鉀可顯著提高葉片可溶性蛋白含量(葉齡30、45、60d)和SOD(葉齡15、30、45d)、CAT(葉齡15、30d)活性,降低MDA含量(葉齡30、4
3、5、60d)和POD活性(葉齡30d),提高籽棉產(chǎn)量、皮棉產(chǎn)量和鉀肥生產(chǎn)效率。本試驗條件下,分次(1/2基施、1/2花鈴期追施)施用硫酸鉀是兼顧高產(chǎn)高效的施肥方式。關(guān)鍵詞:棉花;施鉀方式;內(nèi)源保護(hù)酶活性;產(chǎn)量;鉀肥利用效率EffectofPotassiumApplicationMethodsonAntioxidantEnzymeActivities,Yield,andPotassiumUseEfficiencyofCottonLIZong—Tai,CHENEr—Ying,ZHANGMei—Ling,ZHAOQing·Long,XUXiao—Long,JIHong,SONGXia
4、n.Lian98,andSUNXue—Zhen8KeyLaboratoryofCropBiologyofChina!AgronomyCollegeofShandongAgriculturalUniversity,Tai’all271018,ChinaAbstract:Withapplicationofmoderncotton(GossyiumhirsutumL.)varietiesincludingBt(Bacillusthuringiensis)transgeniccotton,prematuresenescencecausedbypotassium(K)deficiency
5、hasbecomeanimportantproblemincottonproductionintheYellowRiverValleyofChina.Fieldtrialswereconductedin2009and2010usingLumianyan28.Fourtreatmentsconsistingofnopotassium(CK),basalapplicationofpotassiumsulfate(T1),splitapplication(112basaldressingand1/2top—dressingatblossom—ingandbollformingstag
6、e)ofpotassiumsulfate(T2),basalapplicationofcontrolled—releasedcompoundfertilizers(T3)weredesigned.Thesameamountofpotassiumwasappliedwith150埏K20ha-1ineachfertilizertreatment.Theresultsindicatedthatapplicationofpotassiumsignificantlyincreasedchlorophyllandsolubleproteincontents,superoxidedismu
7、tase(SOD)andcata—lase(CAT)activities(attheleafagesof30,40,and60days),seedcottonyieldandlintyield,ascomparedwithCK.Moreover,applicationofpotassiumproducedsignificantlylowermalondialdehyde(MDA)contentandpeoxidase(POD)activity(attheleafagesof30and45da