播期與密度互作對直播棉產(chǎn)量及農(nóng)藝性狀的影響

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關鍵詞播期;密度;棉花；產(chǎn)量;農(nóng)藝性狀中圖分類號 S562 文獻標識碼A文章編號 0517-6611（2025）13-0016-04doi：10.3969/j. issn.0517-6611.2024. 13.004開放科學（資源服務）標識碼（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

長江流域植棉區(qū)在油（麥）后直播時由于生長季節(jié)短，大多使用短季棉品種，但短季棉品種纖維長度偏短、伏旱高溫結鈴率低（花粉在 35°C 以上氣溫條件活性差），產(chǎn)量不高，且一般棉鈴比較小，不方便人工撿花，在該棉區(qū)機械采收尚未普及的情況下不受棉農(nóng)的歡迎。（剩余6261字）