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1、南方農(nóng)業(yè)學(xué)報(bào)JournalofSouthernA鰣euhum2015,46(10):1780-1785ISSN2095—1191:CODENNNXAABDOI:10.3969/j:issn.2095—1191.2015.10.1780多效唑?qū)喡檗r(nóng)藝性狀及抗倒伏性的影響郭媛,邱財(cái)生,龍松華,鄧欣,郝冬梅,王玉富4(中國農(nóng)業(yè)科學(xué)院麻類研究所/南方經(jīng)濟(jì)作物研究所,長沙410205)摘要:【目的】明確多效唑噴施時(shí)期和劑量對纖用亞麻(LinurnusitafissimumL.)農(nóng)藝性狀、產(chǎn)量性狀及抗倒伏能力的影響,為亞麻在南方冬閑田的抗倒伏穩(wěn)產(chǎn)栽培提供參考?!?/p>
2、方法】以中亞麻1號為試驗(yàn)材料,在沅江和長沙2個(gè)試驗(yàn)點(diǎn)進(jìn)行試驗(yàn)。在亞麻的3個(gè)生長時(shí)期(苗期、快速生長期和開花期)分別噴施3種濃度(50、100和200mg/L)的多效唑,成熟期測定亞麻農(nóng)藝性狀、產(chǎn)量性狀,并調(diào)查其表觀倒伏率?!窘Y(jié)果】苗期和快速生長期噴施不同濃度的多效唑可明顯降低亞麻株高和工藝長度,但不同濃度和不同時(shí)期噴施多效唑?qū)喡槟〈帧⒎种?shù)和蒴果數(shù)的影響較小。苗期噴施多效唑可顯著降低亞麻原莖產(chǎn)量(Po.05)。在沅江試驗(yàn)點(diǎn),不同時(shí)期噴施不同濃度多效唑均可降低亞麻表觀倒伏率.其中快速
3、生長期噴施100mg/L多效唑亞麻表觀倒伏率較低(14.17%)且對產(chǎn)量性狀影響不明顯。相關(guān)性分析結(jié)果表明,亞麻表觀倒伏率與株高、工藝長度和單株莖重呈顯著正相關(guān),與種子產(chǎn)量呈顯著負(fù)相關(guān)。【結(jié)論】亞麻快速生長期噴施100mg/L多效唑可在不影響其產(chǎn)量的前提下減輕倒伏,是較好的抗倒伏穩(wěn)產(chǎn)栽培措施。關(guān)鍵詞:亞麻;多效唑;農(nóng)藝性狀;抗倒伏性。中圖分類號:$563.2文獻(xiàn)標(biāo)志碼:A文章編號:2095—1191(2015)10—1780—06Effectsofpaclobutrazolonagronomiccharactersandlodgingresistanc
4、eofflax(Linumusitatissimum)GUOYuan,QIUCai-sheng,LONGSong-hua,DENGXin,HAODong—mei,WANGYu—fu+(InstituteofBastFiberCrops,ChineseAcademyofAgriculturalSciences/InstituteofSouthernEconomicCrops,Changsha410205,China)Abstract:【Objective]Thepresentexperimentwasconductedtoinvestigateeffec
5、tsofpaclohutrazolsprayingtimeandconcentrationonagronomiccharacters,lodgingresistanceandyieldofflax,inordertoprovidereferencesforcultivatinglodging—resistantandstable—yieldflaxinwinterfallowfieldofSouthernChina.【Method】WithflaxvarietyZhongyama1asmaterials。theexperimentswereconduc
6、tedinYuanjiangcityandChangshacity.respectively.Threeconcentrationsofpa.clobutrazol(50,100and200mg/L)weresprayedonflaxplantatthreegrowthstagesviz.,seedlingstage,fastgrowthstageandfloweringstage.Thentheagronomictraits,yieldtraitsandapparentlodgingrateweredetermined.【Result]Theresu
7、ltsshowedthat,differentconcentrationsofpaclobutrazolspayedatseedlingstageandfastgrowthstagecouldobviouslyreducedplantheightandtechnicallength.Comparedwithcontrol,thedifferentspayingtimeandconcentrationofpaclobu—trazolhadlessimpactonstemdiameter,branchnumberandcapsulenumberofflax
8、.Thepaclobutrazolsprayedatseedlingstagecouldred