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1、作物学报ACTAAGRONOMICASINICA2009,35(9):1698−1707http://www.chinacrops.org/zwxb/ISSN0496-3490;CODENTSHPA9E-mail:xbzw@chinajournal.net.cnDOI:10.3724/SP.J.1006.2009.01698机插穴苗数对不同穗型粳稻品种产量及品质的影响1,21,2,*1,31,21,21,2钱银飞张洪程吴文革陈烨李杰郭振华1,21,21,21,21,2张强戴其根霍中洋许轲魏海燕12扬州大学江苏省作
2、物遗传生理重点实验室/农业部长江中下游作物生理生态与栽培重点开放实验室,江苏扬州225009;扬州大3学农业部长江流域稻作创新中心,江苏扬州225009;安徽省农业科学院水稻研究所,安徽合肥230031摘要:以盐粳9号(小穗型)、淮稻9号(中穗型)和9优418(大穗型)为机插材料,研究了每穴栽插苗数对不同穗型水稻产量、品质的影响。结果表明,随穴栽苗数的增加,3种穗型品种的穗数均呈增加趋势,每穗颖花数、结实率和千粒重均呈减小趋势,但变化程度不一。3种穗型品种的产量随穴栽苗数增加均呈先增后减二次曲线变化。小、中、大穗
3、型品种最高产量对应的穴栽苗数分别为4、3、2苗。3种穗型品种稻米的品质性状受穴栽苗数影响的变异程度存在差异,但均表现随穴栽苗数的增加而垩白度和垩白率上升,糙米率、精米率和整精率下降,蛋白质含量变低,直链淀粉含量增加,胶稠度变长;峰值黏度、热浆黏度、崩解值、最终黏度和起始糊化温度等RVA特性值先增后减,而消减值先减后增。对产量与品质指标综合评价,以小穗型品种每穴栽插4苗、中穗型品种每穴3苗、大穗型品种每穴2苗,最利于相对实现高产与优质的协调。关键词:机插粳稻;穴苗数;穗型;产量;品质;RVA谱EffectsofSe
4、edlingsNumberperHillonGrainYieldandQualityinDifferentPanicleTypesofMechanicalTransplantedJaponicaRice1,21,2,*1,31,21,21,2QIANYin-Fei,ZHANGHong-Cheng,WUWen-Ge,CHENYe,LIJie,GUOZhen-Hua,1,21,21,21,21,2ZHANGQiang,DAIQi-Gen,HUOZhong-Yang,XUKe,andWEIHai-Yan1KeyLabo
5、ratoryofCropGeneticsandPhysiologyofJiangsuProvince/KeyLaboratoryofCropPhysiology,EcologyandCultivationinMiddleand2LowerReachesofYangtzeRiverofMinistryofAgriculture,YangzhouUniversity,Yangzhou225009,China;RiceCultivationTechnologyInnova-3tionCenterintheMiddlea
6、ndLowerReachesofYangtzeRiver,MinistryofAgriculture,YangzhouUniversity,Yangzhou225009,China;InstituteofRiceScience,AnhuiAcademyofAgriculturalSciences,Hefei230031,ChinaAbstract:Fieldexperimentwasconductedundertherice-wheattwo-ripesystemsattheLixiaRiverareadurin
7、gtheyear2006–2007,threemid-seasonjaponicaricecultivarsincludingYanjing9(smallpanicletype),Huaidao9(mediumpanicletype)and9you418(largepanicletype)wereadoptedtoinvestigatetheeffectsoffiveplantingdensitiesonyieldandqualityofme-chanical-transplantedrice.Resultssh
8、owedthatwiththeincreaseofseedlingsperhill,thefinalpaniclesperplantincreasedwhilethenumberofgrainsperpanicle,thegrainfillingrateandthe1000-grainweightdecreased;andtheyieldofthreecultivarsi
