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《免耕留茬抛秧栽培模式对水稻生育后期叶片衰老特性的影响》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、作物学报ACTAAGRONOMICASINICA2009,35(8):1562−1567http://www.chinacrops.org/zwxb/ISSN0496-3490;CODENTSHPA9E-mail:xbzw@chinajournal.net.cnDOI:10.3724/SP.J.1006.2009.01562免耕留茬抛秧栽培模式对水稻生育后期叶片衰老特性的影响1,21,*1,*11,3肖启银任万军杨文钰卢庭启刘代银123四川农业大学,四川雅安625014;四川省甘孜州农科所,四川康定626000;四川省农业技术推广总站,四川成都610041
2、摘要:以穗型差异较大的3个杂交稻组合富优I号、D优527、冈优881为材料,研究了不同栽培方式下水稻生育中后期叶片的衰老特性及机制。结果表明,免耕留茬抛秧提高了水稻抽穗后叶片的SPAD值和可溶性蛋白含量,降低了叶片的POD(过氧化物酶)活性,提高了生育后期(抽穗21d后)叶片的SOD(超氧化物歧化酶)和CAT(过氧化氢酶)活性,3种酶协同作用,降低了活性氧自由基产生速率和MDA(丙二醛)含量,从而延缓了植株衰老。关键词:水稻;衰老;免耕;抛秧;栽培模式EffectofCultivationMethodofBroadcastingRiceSeedlingsi
3、ntheFieldwithStanding-StubblesunderNo-tillageConditiononSenescenceCharacteristicsofLeavesduringLateStagesofRiceDevelopment1,21,*1,*11,3XIAOQi-Yin,RENWan-Jun,YANGWen-Yu,LUTing-Qi,andLIUDai-Yin12SichuanAgriculturalUniversity,Ya’an625014,China;AgriculturalSciencesResearchInstituteofG
4、anziDistrict,Kangding626000,China;3SichuanGeneralPopularizationCentreofAgriculturalTechnique,Chengdu610041,ChinaAbstract:ThreepanicletypesofhybridricecombinationsFuyouI,Dyou527,andGangyou881wereusedtoinvestigatetheeffectsofdifferenttillageandcultivationmethodsonthesenescencecharac
5、teristicsandmechanisminmiddleandlatterperiodsofrice.Theresultsshowedthat,theSPADvalueandsolubleproteincontent(SPC)ofleafafterheadingwereincreasedbythetreat-mentofbroadcastingriceseedlingsinthefieldwithstanding-stubblesunderno-tillagecondition(BSNT).Activityofperoxidase(POD)wasdecr
6、eased,butactivitiesofsuperoxidedismutase(SOD)andcatalase(CAT)inthelategrowthduration(21daysafter−heading)wereenhancedbythetreatmentofBSNT.ForBSNT,rateofreactiveoxygenfreeradical(O2")productionspeedandmalondialdehyde(MDA)contentwerelowerthanthoseforothertreatments.Therefore,treatme
7、ntofBSNTeffectivelydelayedsenescenceofplant.Keywords:Rice;Senescence;No-tillage;Broadcasting;Tillageandcultivationmethod国内外研究表明,免耕和秸秆还田有利于培肥土壤,衰老,实现免耕留茬抛秧水稻的高产稳产,而且能为育种[1-2]减少水土流失,防止土壤受侵蚀。近年来,水稻免耕栽工作者培育抗衰老优良杂交稻组合提供一定的理论依据[3-5]培和免耕高留茬栽培得到大面积应用,为稻田免耕和与参考。秸秆还田提供了新的技术途径。人们很早就开展对水稻衰[6-
8、7]1材料与方法老特性的研究。在水稻成熟期延长水稻功能叶的寿命[8
