播期与密度互作对直播棉产量及农艺性状的影响

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关键词播期;密度;棉花；产量;农艺性状中图分类号 S562 文献标识码A文章编号 0517-6611（2025）13-0016-04doi：10.3969/j. issn.0517-6611.2024. 13.004开放科学（资源服务）标识码（OSID）：

Effects of Interaction Between Sowing Date and Density on Yield and Agronomic Characters of Direct-seded Coton ZHANG Li-juan，CHEN Jun-ying，QIN Yu-kun et al（Jiangxi Institute of Economic Crops，Jiujiang，Jiangxi ）

AbstractTheaimstoclarifyeoptimumdensityofmidde-earlymaturingvarietiesindifrentsowingdatesunderdirectseedingconditions，sostovdecalprtfoghtdipleuivatioofooae（at）inOstateal， theefectsofdferntsowingdatesandesitytreamntsootonagoomicchractersandyieldwerereseardi2-O.suls showedthatdelayingsowingdatewouldshortenthegrowthperiod.IndiferentcombinationsofsowingdateanddensityhensowingonMay 15th and the density of 67 500-97 500 plants /hm2 ，the number of bolls per unit area was relatively high. The interaction between sowing date anddensityadosigifiantetollwightandlintperceageteetofsowngdatoncotofibrqualitasucerinause ofthediffrentcliateiachear.Inesowingdterangofthisexperint，Ganzaanbaidgeldasngasitwaated withsuitabledensitySowingilateArldarlyMaytednsityshouldnotexceed65OOplantsm.Sowingind-aytti density was 67 500-97 500 plants /hm2 . Sowing in late May，the harvesting density should be at least 82 5OO plants /hm2 ：

Keywords Sowing date;Density;Cotton;Yield;Agronomic character

长江流域植棉区在油（麦）后直播时由于生长季节短，大多使用短季棉品种，但短季棉品种纤维长度偏短、伏旱高温结铃率低（花粉在 35∘C 以上气温条件活性差），产量不高，且一般棉铃比较小，不方便人工捡花，在该棉区机械采收尚未普及的情况下不受棉农的欢迎。（剩余6261字）