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1、南方農(nóng)業(yè)學報2011,42(12):1473—1475JournalofSouthernAg矗euhurehttp://www.nfnyxb.corn不同拋栽密度和施肥水平對雜交稻百優(yōu)838生長及產(chǎn)量的影響楊振初,鐘光亮(北流市農(nóng)業(yè)技術推廣站,廣西北流537400)摘要:【目的】探討施氮水平和拋栽密度對優(yōu)質雜交稻百優(yōu)838生長和產(chǎn)量的影響,為該品種的保優(yōu)高產(chǎn)栽培提供技術依據(jù)?!痉椒ā?010年晚造在廣西北流開展百優(yōu)838不同拋栽密度和氮肥用量試驗,采用裂區(qū)設計,施肥水平為主區(qū),密度因子為副區(qū)。【結果】在每公頃施105~225kg純氮、拋秧密度24萬~36萬穴范圍內,單位面積的分蘗數(shù)和有效穗
2、數(shù)隨著施氮量的提高和拋秧密度的增加而增加,且密度對有效穗數(shù)增加的貢獻更大;施氮量顯著影響百優(yōu)838的產(chǎn)量;拋秧密度對產(chǎn)量的影響表現(xiàn)出與施氮水平的高度互作,低氮水平下,產(chǎn)量隨密度的增加而增加,但高氮水平下,高密度加速了群體的惡化和產(chǎn)量的下降。【結論】百優(yōu)838獲得高產(chǎn)的適宜施氮水平為105~165ks/ha,適宜拋栽密度為30萬穴/ha,低氮水平下其密度可增加至36萬穴/ha。關鍵詞:雜交稻百優(yōu)838;栽培;施氮量;拋栽密度中圖分類號:$511.04文獻標志碼:A文章編號:2095—1191(2011)12—1473—03Effectsofdifferentplantingdensityan
3、dfertilizationlevelongrowthandyieldofhybridricecultivarBaiyou838YANGZhen—chu.ZHONGGuang—liang(BeiliuAgricultureTechnologyExtensionStation,Beiliu,Guangxi537400,China)Abstract:【Objective]Thepresentexperimentwasconductedtoexploretheeffectsofnitrogenfertilizerapplicationandplantingdensityongrowthandyi
4、eldof—highqualityhybridricecuhivarBaiyou838inordertoprovidehighyieldcultivationtechniquestofarmers.【Method】Afieldexperimentusing印plicationofdifferentnitrogenlevelsandplantingdensityofafinegrainqualityricecuhivarBaiyou838wasconductedinBeiliu,Guangxiduringlateseasonof2010.【Re—suit】Thenumberoftillers
5、andeffectivepaniclesincreasedwithincreaseinnitrogenapplicationfrom105-225kg/haandplantingdensityfrom240,000—360,000plants/ha.Plantingdensitycontributedmoretoincreaseinnumberofeffectivepanicles.NitrogenlevelhadsignificanteffectontheyieldofBaiyou838.Theeffectofplantingdensityontheyieldwashighlycorre
6、latedwimthenitrogenapplication.Underlownitrogenapplication,theyieldincreasedwithincreaseinplant—ingdensity,butunderhighnitrogenapplication,higherplantingdensityworsenedtheplantpopulationandresultedinlowyield.【Conclusion】ThesuitablenitrogenapplicationandplantingdensityforBaiyou838were105-165kg/haan
7、d300,000plants/ha,respectively.Keywords:hybridricecuhivarBaiyou838;cultivation;nitrogenapplication;plantingdensity0引言【研究意義】廣西農(nóng)業(yè)科學院水稻研究所用小粒型軟米不育系百A(梁海福等,2008)配組育成多個品質與常規(guī)優(yōu)質稻相當?shù)耐矶i雜交組合(秦鋼等,2009;梁曼玲等,2010),其中百優(yōu)838品質達一