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1、第１５卷第２期中國生態(tài)農(nóng)業(yè)學(xué)報(bào)Vol暢１５ No暢２２００７年３月ChineseJournalofEco唱AgricultureMarch，?。玻埃埃烦兴久缙诓煌鞴偎嵋杭案捣置谖飳?duì)稗草的化感作用１，２２２倡倡１，２何海斌王海斌陳祥旭林文雄２２２２２賈小麗方長旬甘邱鋒倪尼娜吳文祥（１暢福建農(nóng)林大學(xué)生物農(nóng)藥與化學(xué)生物學(xué)教育部重點(diǎn)實(shí)驗(yàn)室，福州?。常担埃埃埃?；２暢生命科學(xué)學(xué)院，福州?。常担埃埃埃玻┱谧匀环N植條件下研究了強(qiáng)化感水稻品種“PI３１２７７７”不同葉期（３～６葉）、不同器官（根、莖、葉）水浸提液對(duì)稗草
2、根長的抑制率，比較了不同極性樹脂處理后水稻根系分泌物水溶液的抑制率變化。結(jié)果表明：在３～６葉期相同水稻器官比較，均以５葉期浸提液抑制率最高；５葉期水稻不同器官比較，以葉的浸提液抑制率最高；土培至６葉期的水稻根系分泌物水溶液的抑制率為４７暢０６％，經(jīng)極性樹脂ADS唱２１處理后抑制率增強(qiáng)為６４暢７１％，經(jīng)非極性樹脂ADS唱５處理后抑制率減弱為２６暢４７％；水培至６葉期的水稻根系分泌物水溶液的抑制率為３８暢２４％，經(jīng)ADS唱２１處理后抑制率增強(qiáng)為５８暢８２％，經(jīng)ADA唱５處理后抑制率減弱為２０暢５９％。因此水稻“PI３１２７
3、７７”根系分泌物中化感物質(zhì)以非（弱）極性物質(zhì)為主，極性物質(zhì)減弱了非（弱）極性物質(zhì)的化感抑草作用。關(guān)鍵詞水稻化感作用水浸提液根系分泌物稗草１，２Allelopathiceffectsofaqueousextractsfromdifferentpartsandrootexudatesofriceonbarnyardgrass．HEHai唱Bin，２２１，２２２２２WANGHai唱Bin，CHENXiang唱Xu，LINWen唱Xiong，JIAXiao唱Li，F(xiàn)ANGChang唱Xun，GANQiu唱Feng，NINi唱N
4、a，WUWen唱Xiang（１暢KeyLabofPesticideandChemicalBiologyofMinistryofEducation，F(xiàn)ujianAgricultureandForestUniversityFuzhou３５０００２，China；２暢SchoolofLifeSciences，F(xiàn)ujianAgricultureandForestryUniversity，F(xiàn)uzhou３５０００２，China），CJEA，２００７，１５（２）：１４～１７AbstractUndernaturalconditions，
5、theinhibitoryrate（IR）ofaqueousextractsfromdifferentpartsofallelopathicriceac唱cession“PI３１２７７７”（plantedinpaddysoil）indifferentlifestage（３～６leaf）totherootgrowthofbarnyardgrasswerestud唱ied．TheIRofrootexudatesat６leafstageofriceplantedinpaddysoilandinhydroponicsandtr
6、eatedbypolarresinADS唱２１andnonpolarresinADS唱５respectively，weretestedinthebioassay．TheresultsshowthattheIRoftheaqueousextractsinsamericepartsat５leafstageisthehighestamong３～６leafstages，andtheIRoftheaqueousextractsfromleavesat５leafstageisthestrongest．TheIRoftheroote
7、xudatesofthericewhichareplantedinpaddysoilto６leafstageis４７．０６％，andtheIRincreasesto６４．７１％aftertreatedbyADS唱２１anddecreasesto２６．４７％aftertreatedbyADS唱５；theIRoftherootexudatesofthericewhicharegrowninhydroponicsto６leafstageis３８．２４％，andtheIRincreasesto５８．８２％aftertreate
8、dbyADS唱２１anddecreasesto２０．５９％aftertreatedbyADS唱５．Theresultsimpliesthattheallelo唱pathiceffectsofthericerootexudatesmightbemainlyresultedfromthenonpolar（orweakpolar）com
