密度和植株配置对大豆主要农艺及生理性状的影响-论文.pdf

《密度和植株配置对大豆主要农艺及生理性状的影响-论文.pdf》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、第33卷第4期大豆科学VoI_33No．42014年8月S0YBEANSCIENCEAug．2014密度和植株配置对大豆主要农艺及生理性状的影响王文斌，曹永强，闫春娟，王昌陵，孙旭刚，张立军，宋书宏(辽宁省农业科学院作物研究所，辽宁沈阳110161)摘要：以辽豆21为试材，设3个密度水平(15万，18万，21万株·hmI2)及4种植株配置方式(1，2，3，4株．穴)．研究各因素对大豆主要农艺性状和生理性状的影响。结果表明：大豆穴播方式(≥2株·穴)可以显著提高大豆出苗率；植株配置相同条件下，随种植密度的增

2、加，植株株高、节间长度和结荚高度均显著增加，分枝数则逐渐减小，且叶面积指数峰值出现时间提前；相同密度条件下，随每穴株数的增加，株高和节间长度均呈下降趋势，结荚高度显著增加，分枝数则先增加后下降；同一时期，随每穴株数的增加，叶面积指数逐渐增大，植株配置对生物产量积累量的影响较小；不同处理大豆各器官所占比例的趋势一致，即：籽粒>茎秆≥叶片>叶柄>荚皮。在适宜密度下，适当增加每穴株数，有利于形成合理的群体结构。关键词：大豆；植株配置；农艺性状；生理性状中图分类号：$565．1文献标识码：ADOI：10．1186

3、1／j．issn．1000-9841．2014．04．0502EfectsofPlantDensityandDistributionPatternonMainAgronomicandPhysi-ologicalCharactersinSoybeanWANGWen-bin，CAOYong—qiang，YANChun-juan，WANGChang—ling，SUNXu—gang，ZHANGLi-jun，SONGShu—hong(CmpInstitute，LiaoningAcademyofAculturalSc

4、ience，Shenyang110161，China)Abstract：Thestudywascarriedoutin2010throughthefieldexperimentwithLiaodou21．Threelevelsinplantingdensityand4】evelsinplantcollocationwereconductedinShenyangtoinvestigatetheeffectsofdifierentplantdensityanddistributionpatternonmain

5、agronomicandphysiologicalcharacters．Theresultswereas~llows：Bunchplanting(morethan2plantsperca—ve)ofsoybeanincreasedseedlingratesignificantly．Underthesameplantdistributionpattern，plantheight，internodelengthandpodheightincreasedsignificantlybutthenumberofbr

6、anchesperplantdecreased，andthepeaksofLAI(1eafareaindex)ofsoybeanpopulationappearedearlierwiththeincreaseofplantingdensity．Underthesameplantingdensity，plantheightandpanellengthdecreasedbutbranchperplantfirstincreasedandlaterdecreasedwithplantpercaveincreas

7、ed。Atthesamegrowingstage，plantdensityandplantdistributionpatternhadlesseffectondrymatteraccumulationandLAIincreasedgradu—allywithplantpercaveincreased．Theproportionofdrymatterweightofdifferentorganswasnearlyidenticalunderdifferenttreatments．Thetrendoforga

8、ndistributionratioamongtreatmentsshowedinthesameorder：seed>stem≥leaf>petiole>podshel1．Intheoptimumdensity，itismorebeneficialfortheformationofreasonablepopulationstructuretoincreaseplantnumberperholeappropriate．Keywo