資源描述：
《施肥方式對水稻根系生長、養(yǎng)分吸收與土壤養(yǎng)分分布的影響》由會員上傳分享，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、萬方數(shù)據(jù)華中農(nóng)業(yè)大學(xué)2015屆碩士研冗生學(xué)位論文andnutrientabsorptionunderlowandhighnitrogenfertilizerapplication，respectively．MtIlthegrowthofriceroot，nutritionoffertilizationinshallowwasinshortsupplyinlatestage．Therootgrowth，grainyield，nutritionabsorptionandnitrogenuseeffi
2、ciencyofseparatedlayerfertilizationwerehigherthanothers．Itincreasedthenumberofdeeprootandimprovedthelodgingresistanceofrice．netrendofsoilinorganicnitrogenmigrationWasobviouswiththewater．NitrogeninthesoilcouldnotbeabsorbedbyricerootandeasytolOSSwhenfe
3、rtilizerwasaway10cmfromthesoilsurface．Thereforeseparatedlayerfertilizationshouldkept0-5cminshallowsoiland5-10cmindeepsoil．(3)Resultsshowedthatthebiomass，rootbleedingsapanditscompositionofrootzonefertilizationtreatment(T2)Wassignificantlyhigherthanoth
4、ersattiUeringstage．曬enricewasharvested!biomassesandnutritionabsorptiondeclinedfirstandthenrosewiththeincreasingoffertilizationsiteclosetorootzoneandtreatmentT3showedthehighest．Thetreatmentoffertilizationsitemorethan8cmclosetorootzonewassignificantlyl
5、owerthantreatmentT1．SoilavailablenutritioncontentoftreatmentTIhadnosignificantdifferenceswithothersattilleringstage，andbecamehigherthefartherfertilizationsiteclosetorootzone．SoilnutritioncontentinrootzonecompartmentoftreatmentT2wassignificantlyhigher
6、thanothers．Ofallthedifferencesamongtreatments，thegreatestoneWasavailablephosphorus，availablepotassiumtooksecondplace，andtheleastoneWasinorganicnitrogen．Soilnutritioncontentinrootzonecompartmentdeclinedmoststeeplyinharvesttime．Soilavailablenutritionco
7、ntentinrootzonecompartmentoffertilizationsiteclosetorootzonewashigher．Itcouldpromotericeyieldformationandincreasenutrientabsorption．ThenutritionmigratingtoricerootWaslimitedanddifficulttobeabsorbed，iffertilizationsiteWasmorethan8cmclosetorootzone．Key
8、word：Fertilizationdepth；Fertilizationdistance；Rice；Root；Biomass；Nutritionefficiency；Soilnutritiondistribution萬方數(shù)據(jù)施肥方式對水稻根系生長、養(yǎng)分吸收及土壤養(yǎng)分分布的影響1緒論1．1水稻生產(chǎn)及發(fā)展現(xiàn)狀水稻是全世界重要的糧食作物之一，其種植面積及產(chǎn)量在世界糧食生產(chǎn)中均占重要的地位。統(tǒng)計(jì)資料顯示，全世界一半以上的人口以稻米為主食，而世界上水稻的種植區(qū)主要集中在亞洲地區(qū)(申建波等，2006)，其
