免耕抛栽对水稻产量及其源库特性的影响

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1、作物学报ACTAAGRONOMICASINICA2009,35(1):162−172http://www.chinacrops.org/zwxb/ISSN0496-3490;CODENTSHPA9E-mail:xbzw@chinajournal.net.cnDOI:10.3724/SP.J.1006.2009.00162免耕抛栽对水稻产量及其源库特性的影响1,22,*2吴建富潘晓华石庆华12江西农业大学国土资源与环境学院,江西南昌330045;江西农业大学农学院/江西省作物生理生态与遗传育种重点实验室,江西南昌330

2、045摘要:于2005—2006年在双季稻田以翻耕处理为对照,研究了免耕抛栽对水稻产量及其源库特性的影响。结果表明,每公顷有效穗数免耕抛秧处理略低于翻耕抛秧而高于翻耕移栽,结实率高于翻耕处理。随着免耕次数的增加,各处理产量基本持平。水稻一生中叶面积指数、抽穗后水稻群体光合势、势粒比、颖花伤流量、源库增量比和籽粒平均灌浆速率均免耕处理高于翻耕处理,而粒叶比则相反;剑叶中叶绿素含量以免耕高于翻耕,而丙二醛(MDA)含量以免耕低于翻耕。免耕抛栽水稻后期不易早衰,有利于同化物的转运和结实率的提高。关键词:稻田;双季稻;免耕抛

3、栽;产量;源库特性EffectsofNo-tillageCastTransplantingonRiceYieldandItsSource-SinkCharacteristics1,22,*2WUJian-Fu,PANXiao-Hua,andSHIQing-Hua12CollegeofLandResourcesandEnvironment,JiangxiAgriculturalUniversity,Nanchang330045,China;CollegeofAgronomy,JiangxiAgricul-turalUn

4、iversity/KeyLaboratoryofCropPhysiology,Ecology,andGeneticBreedingofJiangxiProvince,Nanchang330045,ChinaAbstract:Theexperimentswereconductedindoublecroppingricefieldduring2005–2006tostudytheeffectsofdifferenttillagemethodsonriceyieldanditssource-sinkcharacterist

5、ics.Theresultsshowedthattheeffectonpaniclenumberwaslowerandonfilledgrainpercentagewashigherinno-tillagecasttransplantingtreatmentthaninconventionaltillagecasttransplantingtreat-ment.Withthetimeofno-tillageincreased,riceyieldindifferenttreatmentsdidnotdiffersign

6、ificantly.Theleafareaindexduringgrowthstages,thepopulationphotosyntheticpotential,photosyntheticpotential-grainratio,bleedingpotentialinneekofspike,ratioofsourcetosinkinincrementandmeangrainfillingrateinno-tillagetreatmentwerehigherthanthoseinconventionaltill-a

7、getreatment,butthegrain-leafratioinno-tillagetreatmentwaslowerthanthatinconventionaltillagetreatment.ThecontentofchlorophyllwashigherandthecontentofMDAwaslowerinflagleafafterheadinginno-tillagetreatmentthaninconventionaltillagetreatment.No-tillagetreatmentwasde

8、layedleafsenescence,facilitatedtheaccumulationandtransportationofcarbohy-drate,andimprovedgrainsettingrate.Keywords:Paddyfield;Doublecroppingrice;No-tillagecasttransplanted;