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1、面地肇業(yè)學(xué)報(bào)2012,21(1):88—93ActaAgriculturaeBorealioccidentalisSinica頂端調(diào)控對亞麻農(nóng)藝性狀及抗倒伏變化的影響孟桂元。,賀再新,孫煥良,周清明。,柏連陽,周靜(1.湖南人文科技學(xué)院,湖南婁底417000;2.湖南農(nóng)業(yè)大學(xué)農(nóng)學(xué)院,長沙410128;3.懷化職業(yè)技術(shù)學(xué)院,湖南懷化418000)摘要:為探明頂端調(diào)控后亞麻莖稈抗倒伏能力變化,以常規(guī)栽培為對照,研究“打頂+抑芽”、打頂、抑芽處理對亞麻農(nóng)藝性狀變化的影響及其與倒伏的關(guān)系。結(jié)果表明,“打頂+抑芽”處理后株高大
2、幅下降(25.17),莖稈明顯增粗(12.24),分枝數(shù)、分枝長度、分枝鮮質(zhì)量、蒴果數(shù)和蒴果鮮質(zhì)量均明顯減少,平均分別較對照減少67.5O、52.8O、95.58、88.94和93.o9;抑芽處理后莖粗無明顯變化,但株高、分枝數(shù)、分枝長度、分枝鮮質(zhì)量、蒴果數(shù)及蒴果鮮質(zhì)量都有不同程度的減少,處理后較對照分別減少6.41、20.0、13.O8、22.73、19.O5和5.94;而打頂處理后分枝長度明顯增長(34.11oA),蒴果數(shù)和蒴果鮮質(zhì)量分別減少29.76和5o.93,其余形態(tài)特征均變化不大。相關(guān)分析表明,株高、分枝
3、數(shù)、分枝長度、分枝鮮質(zhì)量、蒴果數(shù)和蒴果鮮質(zhì)量與倒伏均呈極顯著正相關(guān),而莖粗與倒伏呈極顯著負(fù)相關(guān)。因此,亞麻生育后期以“打頂+抑芽”處理較為理想,能有效提高麻株抗倒伏能力。關(guān)鍵詞:亞麻;頂端調(diào)控;農(nóng)藝性狀;抗倒中圖分類號:$563.2文獻(xiàn)標(biāo)志碼:A文章編號:1004—1389(2012)01—0088—06EffectsofShootApexRegulationonAgronomicTraitsandLodgingResistanceofFlaxMENGGuiyuan~,HEZaixin?!?,SUNHuanliang。
4、,ZHOUQingming。,BAILianyangandZHOUJing(1.HunanInstituteofHumanitiesScienceandTechnology,LoudiHunan417000,China;2.CollegeofAgriculture,HunanAgricultureUniversity,Changsha410128,China;3.HuaihuaVocationalTechnologyCollege,HuaihuaHunan418000,China)Abstract:Inorderto
5、determinetheeffectsofshootapexregulationonflaxstalklodgingresistance,weusedthreetreatments,decapitationplusinhibitingsucker,decapitation,inhibitingsucker,andconventionalcultivationasthecontroltostudythechangesofmorphologicalcharacteristicsandtheirrelationshipwi
6、thlodgingresistance.Theresultsshowedthat“decapitation4-inhibitingsucker’’treatmentcansignificantlydecreaseplantheight(25.17),enlargestemdiameter(12.24),andsig—nificantlyreducethebranchnumber,branchlength,branchfreshmass,capsulenumberandcapsulefreshmassbytheaver
7、ageof67.5O,52.8O%,95.58、88.94and93.09respectively.Ininhib—itingsuckertreatment,therewasnosignificantchangesinstemdiameter,buttheplantheight,branchnumber,branchlength,branchfreshmass,freshmassofcapsuleandcapsulenumberde—creased6.419/5,2O.0,13.08,22.730A,19.O5and
8、5.94.Thebranchlengthofthedecapita—tiontreatmentsignificantlyincreased(34.1l),butthecapsulenumberandcapsulefreshmassde—creasedby29.76and50.939/6,andriochangesforothermorpholo