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《不同种植密度与留叶枝方式对三系杂交棉产量构成和产量的影响》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、河北农业科学,2013。17(6):13—15,31JournalofHebeiAsriculturalSciences编辑杜晓东不同种植密度与留叶枝方式对三系杂交棉产量构成和产量的影响马维军,任爱民,韩秋成,张玉娟,崔明晖,尹国,王双贵(邯郸市农业科学院,河北邯郸056001)摘要:以转基因抗虫三系杂交棉邯杂429为试验材料设两因素(种植密度、留叶枝方式)三水平试验设计,其中,种植密度水平为2.25~./hm、3.75YY~/hm和5.25万擗/hm,留叶枝方式水平为不留叶枝(常规整枝,CK)、留2个优势叶枝和
2、留全部叶枝,研究不同种植密度与留叶枝方式对棉花产量构成和产量的影响。结果表明:保留叶枝能够提高棉花的霜前花率,促进棉花早熟,但在不同的密度种植时棉产量构成和产量效应不同:低密度栽培时,保留叶枝能够显著提高单株铃数和霜前花率,最终使产量略有提高;中等密度栽培时,保留叶枝会显著降低单铃重,最终导致产量降低,其中留全部叶枝的棉花减产显著;高密度栽培时,保留叶枝会降低棉花单铃重,其中留2个优势叶枝棉花的单铃重降低显著,最终导致产量略有降低。在三系杂交棉简化整枝栽培管理中,采用种植密度3.757Y~,lhm、留2个优势叶枝
3、方式栽培棉花产量最高,籽棉产量为5383.6ks/hm。关键词:种植密度;留叶枝;三系杂交棉;产量构成;产量中图分类号:s562文献标识码:A文章编号:1008.1631(2013)06-0013-03EfectsofDiferentPlantDensitiesandRetentionofVegetativeBranchesModesontheYieldComponentsandYieldofHybridCottonBasedonCytoplasmicMale·sterilitySystem.MAWei-jun,
4、RENAi—min,HANQiu—cheng,ZHANGYu-juan,CUIMing—hui,YINGuo,WANGShuang—gui(HandanAcademyofAgriculturalSciences,Handan056001,China)Abstract:TakingtransgenicBthybridcottonHanza429basedoncytoplasmicmale—sterilitysystemasthetestmaterial,threedifferentplantdensities(2.
5、25×10,3.75×10and5.25×10plants/hm)weretreatedwithoutvegetativebranches(CK)orwithtwoorallvegetativebranchestostudytheeffectsontheyield.componentsandyieldofcotton.Theresultsshowedthattheretentionofvegetativebranchescouldpromotetherateofpre—frostlintcotton,butthe
6、effectonyieldcomponentsandyieldunderdifferentplantdensitieswasdifferent,underlowplantdensity,theretentionofvegetativebranchessignificantlypromotedthenumberofthebollspercottonandtherateofpre—frostlintcotton,finallyincreasedtheyields.Undermiddleplantdensity,the
7、retentionofvegetativebranchessignificantlydecreasedthebollweight,finallydecreasedtheyields,theretentionofallvegetativebranchessignificantlydecreasedtheyields.Underhighplantdensity,theretentionofvegetativebranchesdecreasedthebollweight,theretentionoftwovegetat
8、ivebranchessignificantlydecreasedthebollweight,finallydecreasedtheyieldsslightly.Accordingly,theyieldoftheretentiontwovegetativebranchesundermiddleplantdensity(3.75×10plants/hm)inhybridco
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