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1、584棉花學(xué)報CottonScience2016,28(6):584―593花鈴期干旱脅迫復(fù)水后棉花產(chǎn)量和纖維品質(zhì)的變化研究*牛靜袁張雷袁張思平袁劉紹東袁馬慧娟袁趙新華淵中國農(nóng)業(yè)科學(xué)院棉花研究所/棉花生物學(xué)國家重點(diǎn)實(shí)驗室袁河南安陽455000冤摘要院以抗旱差異明顯的中棉所45淵CCRI45冤和中棉所60淵CCRI60冤為材料袁采用人工控水的方法袁研究棉花花鈴期不同干旱脅迫程度和干旱脅迫后復(fù)水棉花根系干物質(zhì)質(zhì)量堯皮棉產(chǎn)量和纖維品質(zhì)的變化遙結(jié)果表明袁CCRI45根系干物質(zhì)質(zhì)量增加幅度和皮棉產(chǎn)量在SRWC((45依5)%)干旱脅迫6d后復(fù)水最大袁且
2、達(dá)到顯著水平淵＜0.05冤袁CCRI60根系干物質(zhì)質(zhì)量增加幅度和皮棉產(chǎn)量在SRWC((60依5)%)干旱脅迫6d后復(fù)水最大袁且達(dá)到顯著水平淵＜0.05冤袁但CCRI45和CCRI60根系干物質(zhì)質(zhì)量和皮棉產(chǎn)量在SRWC((45依5)%)干旱脅迫9d后復(fù)水顯著低于對照遙CCRI45纖維上半部平均長度堯整齊度指數(shù)堯伸長率和斷裂比強(qiáng)度在SRWC((60依5)%)和SRWC((45依5)%)干旱脅迫6d后復(fù)水均高于對照袁CCRI60纖維上半部平均長度堯整齊度指數(shù)堯伸長率和斷裂比強(qiáng)度在SRWC((45依5)%)干旱脅迫3d和SRWC((60依5)%)干旱
3、脅迫6d后復(fù)水均高于對照袁但未達(dá)到顯著水平袁CCRI45和CCRI60在SRWC((45依5)%)干旱脅迫9d后復(fù)水纖維品質(zhì)顯著低于對照遙在SRWC((45依5)%)干旱脅迫6d后復(fù)水袁CCRI45根系干物質(zhì)質(zhì)量和皮棉產(chǎn)量的增加幅度大于CCRI60袁表明CCRI45的抗旱性高于CCRI60袁且補(bǔ)償能力較高遙同時袁棉花根系干物質(zhì)質(zhì)量增加量與棉花皮棉增加量存在顯著的正相關(guān)關(guān)系遙本研究結(jié)論將為棉花生產(chǎn)上適時堯適度采取抗旱栽培調(diào)控措施及開展棉花節(jié)水高產(chǎn)栽培技術(shù)研究提供理論依據(jù)遙關(guān)鍵詞院棉花曰干旱曰復(fù)水曰產(chǎn)量曰纖維品質(zhì)中圖分類號院S562.04文獻(xiàn)標(biāo)志
4、碼院A文章編號院1002-7807淵2016冤06-0584-1010.11963/issn.1002-7807.201606008*NiuJing,ZhangLei,ZhangSiping,LiuShaodong,MaHuijuan,ZhaoXinhua(455000,)Twocottonvarieties(CCRI45andCCRI60)withdifferentdroughttoleranceswerescreenedtostudytheeffectsanddurationofdroughtstressafterre-wateringo
5、ncottonrootdryweight,yieldandqualityduringthefloweringandboll-formingstagesusinganartificialwater-controlmethod.Cottonrootdryweightincreased,andCCRI45hadthegreatestcottonlintyield,whichwassignificant(＜0.05),underthe45%依5%-soilrelativewatercontent(SRWC)-induceddroughtstressf
6、or6dafterre-watering.Thecottonrootdryweightincreased,andCCRI60hadthegreatestcottonlintyield,whichwassignificant(＜0.05),underthe60%依5%-SRWC-induceddroughtstressfor6dafterre-watering.However,CCRI45andCCRI60weresignifi-cantlylowerinrootdryweightsandlintyieldsunderthe45依5%-SRWC
7、-induceddroughtstressfor9dafterre-wateringthanthecontrol.CCRI45hadhigherfiberlengthvalues,uniformityindexes,elongationratesandfiberstrengthsunderthe60%依5%-and45依5%-SRWC-induceddroughtstressesfor6dafterre-wateringthanthecontrol.CCRI60hadhigherfiberlengthvalues,uni-formityind
8、exes,elongationratesandfiberstrengthsunderthe45%依5%-SRWC-induceddroughtstressfor3d
