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《種植密度和縮節(jié)胺調(diào)控對(duì)麥后直播棉產(chǎn)量和冠層特征的影響》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、棉花學(xué)報(bào)CottonScience2016,28(4):331―338種植密度和縮節(jié)胺調(diào)控對(duì)麥后直播棉產(chǎn)量和冠層特征的影響111*22楊長(zhǎng)琴袁張國偉袁劉瑞顯袁張雷袁周關(guān)印淵1.江蘇省農(nóng)業(yè)科學(xué)院經(jīng)濟(jì)作物研究所/農(nóng)業(yè)部長(zhǎng)江下游棉花與油菜重點(diǎn)實(shí)驗(yàn)室袁江蘇南京210014曰2.中國農(nóng)業(yè)科學(xué)院棉花研究所袁河南安陽455000冤摘要院2013―2014年以早熟棉(中棉所50)為材料袁采用裂區(qū)設(shè)計(jì)袁在江蘇省南京市研究了種植密度淵7.50萬堯9.75萬和12.00萬株窯hm－2冤和縮節(jié)胺淵DPC冤調(diào)控淵0袁52.5和105.0g窯hm－2冤對(duì)麥后直
2、播棉產(chǎn)量和冠層特征的影響遙結(jié)果表明院皮棉產(chǎn)量在不同種植密度下以12.00萬株窯hm－2處理最低袁在不同DPC用量水平下以0g窯hm－2處理最低曰種植密度與DPC調(diào)控存在互作效應(yīng)袁以種植密度9.75萬株窯hm－2堯DPC用量52.5～105g窯hm－2處理產(chǎn)量較高袁且產(chǎn)量構(gòu)成中以鈴數(shù)對(duì)產(chǎn)量的直接效應(yīng)最大遙對(duì)冠層特征影響表明袁下部果枝夾角和長(zhǎng)度隨種植密度增加而降低袁而中堯上部果枝的夾角和長(zhǎng)度堯葉面積指數(shù)均以種植密度9.75萬株窯hm－2處理較高曰不同部位果枝夾角和長(zhǎng)度堯葉面積指數(shù)均隨DPC用量增加而降低袁而透光率則相反遙相關(guān)分析表明袁下
3、部果枝夾角大堯中部果枝較長(zhǎng)及上部果枝夾角小且葉面積指數(shù)和透光率較高袁有利于提高產(chǎn)量和霜前花率遙綜上袁該棉區(qū)麥后直播棉種植密度9.75萬株窯hm－2堯DPC用量52.5～105g窯hm－2(蕾期堯開花期和打頂后用量比例為1∶2∶4)袁有利于改善棉花冠層特征袁實(shí)現(xiàn)早熟高產(chǎn)遙關(guān)鍵詞院麥后直播棉曰種植密度曰縮節(jié)胺調(diào)控曰產(chǎn)量曰冠層特征中圖分類號(hào)院S562.04文獻(xiàn)標(biāo)志碼院A文章編號(hào)院1002-7807淵2016冤04-0331-0810.11963/issn.1002-7807.201604003111*22YangChangqin,Zhan
4、gGuowei,LiuRuixian,ZhangLei,ZhouGuanyin(1.210014,;2.455000,)Usingtheearlymaturecotton(CCRI50)asmaterial,afieldexperimentwascarriedouttoevaluatetheeffectsoftheplantgrowthregulatormepiquatchloride(DPC)onyieldandcanopyarchitectureofcottonsownafterharvestingbarleyinNan-jin
5、g,JiangsuProvince,China,in2013―2014.Asplit-plotdesignwiththreereplicateswasusedforthestudy.Themainplotscomprisedthreeplantingdensities(7.5伊104,9.75伊104,and12伊104plant窯hm－2),whiledifferentDPCapplicationrates(0,52.5,and105g窯hm－2)constitutedthesubplots.Theresultsshowedtha
6、tthelowestlintyieldswerefoundattheplantingdensityof12伊104plant窯hm－2andtheDPCadditionrateof0g窯hm－2,respectively.AsignificantinteractionwasdetectedbetweenplantingdensityandDPConlintyieldandasaresult,thetreatmentof9.75伊104plant窯hm－2withDPCof52.5―105g窯hm－2achievedhigherlin
7、tyieldthanothertreatments.Thebollnumberofyieldcomponenthasthelargestdirecteffectonlintyield.Intermsofcanopyarchitecture,theanglesandlengthoflowfruitbranchesdecreasedwithplantingdensityincrease,whilethelarg-erangles,length,andleafareaindexofmiddleandupperfruitbrancheswe
8、refoundat9.75伊104plant窯hm－2.TheanglesandlengthoffruitbranchesandtheleafareaindexdecreasedwiththeDPCapplicationrateinc
