DOI:10.3969/j.issn.1003-0972.2023.03.021文章编号:1003-0972(2023)03-0468-09播期和播量对豫南直播稻产量形成特征的影响雷振山*,金明慧,肖荣英,季新(信阳农林学院农学院,河南信阳464000)摘要:为探究播期和播量对豫南直播稻产量和干物质累积的影响,以水稻品种丰优香占为试验材料,设置5个播期处理,即A1(4月25日)、A2(5月5日)、A3(5月15日)、A4(5月25日)和A5(6月4日),5个播量处理,即B1(18.0kg/hm2)、B2(22.5kg/hm2)、B3(27.0kg/hm2)、B4(31.5kg/hm2)和B5(36.0kg/hm2)。结果表明:播期和播量对产量的影响均达到极显著水平;二者交互对产量、有效穗数、穗粒数、千粒重的影响均达到极显著水平。随着播期的推迟,直播稻产量先增加后减少。在A1、A2、A3、A4和A5播期下,直播稻在A1B5、A2B3、A3B3、A4B4、A5B5处理下获得最高产量,其最高产量分别为7531.7、9169.5、9470.3、7961.9和7462.9kg/hm2;直播稻在A3B3水平下,有效穗数适宜,每穗粒数较多,生长后期干物质累积量较多,干物质累积速率较高,达到最高产量。关键词:直播稻;播期;播量;产量;干物质累积量中图分类号:S511.4文献标识码:A开放科学(资源服务)标识码(OSID):EffectsofSowingDateandSowingAmountonYieldFormationCharacteristicsofDirect-seededRiceinSouthernHenanLEIZhenshan*,JINMinghui,XIAORongying,JIXin(CollegeofAgronomy,XinyangAgricultureandForestryUniversity,Xinyang464000,China)Abstract:Toinvestigatetheeffectsofsowingdateandsowingamountontheyieldanddrymatteraccumulationofdirect-seededriceinsouthernHenan,fivesowingdatetreatments,namelyA1(25April),A2(5May),A3(15May),A4(25May),andA5(4June),andfivesowingratetreatments,namelyB1(18.0kg/hm2),B2(22.5kg/hm2),B3(27.0kg/hm2),B4(31.5kg/hm2)andB5(36.0kg/hm2),aresetupusingthericevarietyFengyouxiangzhanastheexperimentalmaterials.Theresultsshowthattheeffectsofbothsowingdateandsowingamountonyieldreachesaverysignificantlevel,andtheeffectsoftheirinteractiononyield,effectivepaniclenumber,grainnumberperpanicleand1000-grainweightarehighlysignificant.Withthedelayofsowingdate,theyieldofdirect-seededriceincreasesfirstandthendecreases.UnderthesowingdatesofA1,A2,A3,A4andA5,themaximumyieldsofdirect-seededriceunderA1B5,A2B3,A3B3,A4B4andA5B5treatmentsare7531.7,9169.5,9470.3,7961.9and746...
