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1、中國油料作物學(xué)報(bào)2013,35(2):185-189ChineseJournalofOilCropSciencesdoi:10.7505/j.issn.1007-9084.2013.02.012氮肥用量對諸葛菜產(chǎn)量及氮素吸收利用的影響12134,5劉佳,張杰,徐昌旭,志水勝好,曹衛(wèi)東(1.江西省農(nóng)業(yè)科學(xué)院土壤肥料與資源環(huán)境研究所,農(nóng)業(yè)部長江中下游作物生理生態(tài)與耕作重點(diǎn)實(shí)驗(yàn)室,國家紅壤改良工程技術(shù)研究中心,江西南昌,330200;2.中國農(nóng)業(yè)科學(xué)院研究生院,北京,100081;3.筑波大學(xué)農(nóng)林學(xué)系,日本筑波,305-8572;4.中國農(nóng)業(yè)科學(xué)院農(nóng)業(yè)資源與農(nóng)業(yè)區(qū)劃研究所,農(nóng)業(yè)部作物營
2、養(yǎng)與施肥重點(diǎn)開放實(shí)驗(yàn)室,北京,100081;5.青海大學(xué),青海西寧,810016)2摘要:通過小區(qū)試驗(yàn)研究了氮肥用量(0、45、90、135、180kg/hm)對諸葛菜盛花期鮮草產(chǎn)量、養(yǎng)分含量和累積量、籽粒產(chǎn)量和氮肥利用率的影響。結(jié)果表明,施用氮肥可以顯著提高諸葛菜的鮮草產(chǎn)量、養(yǎng)分累積量和籽粒產(chǎn)22量,以施氮135kg/hm時(shí)為最高,鮮草產(chǎn)量達(dá)到21350kg/hm,氮、磷、鉀累積量分別達(dá)到67.17、11.62和87.05kg/22hm,籽粒產(chǎn)量達(dá)到993kg/hm;施氮可以提高諸葛菜鮮草和籽粒中的氮素含量。合理施氮能促進(jìn)諸葛菜的生長,但氮肥農(nóng)學(xué)利用率、偏生產(chǎn)力和表觀利用率均會隨
3、著施氮量的增加而顯著下降;過量施氮對諸葛菜的生長不利。關(guān)鍵詞:諸葛菜;氮肥用量;產(chǎn)量;氮肥利用率+3中圖分類號:S565.9;S142文獻(xiàn)標(biāo)識碼:A文章編號:1007-9084(2013)02-0185-05EffectsofNapplicationrateonyieldandplantNuptakeandutilizationofOrychophragmusviolaceus12134,5LIUJia,ZHANGJie,XUChang-xu,KatsuyoshiSHIMIZU,CAOWei-dong(1.SoilandFertilizer&ResourcesandEnviron
4、mentInstitute,JiangxiAcademyofAgriculturalSciences;MinistryofAgricultureKeyLaboratoryofCropEcophysiologyandFarmingSystemfortheMiddleandLowerReachesoftheYangtzeRiver;NationalEngineering&TechnologyResearchCenterforRedSoilImprovement,Nanchang330200,China;2.GraduateSchoolofChineseAcademyofAgricult
5、uralSciences,Beijing100081,China;3.InstituteofAgricultureandForestry,UniversityofTsukuba,Tsukuba305-8572,Japan;4.InstituteofAgriculturalResourcesandRegionalPlanning,ChineseAcademyofAgriculturalSciences;MinistryofAgricultureKeyLaboratoryofCropNutritionandFertilization,Beijing100081,China;5.Qing
6、haiUniversity,Xining810016,China)Abstract:Plotexperimentswerecarriedouttostudytheeffectsofnitrogen(N)applicationrateonfreshyield,nutrientcontentsandaccumulations,seedyieldandNuseefficiencyofOrychophragmusviolaceus.ResultsshowedthatcomparedtonoNapplication,thefreshyield,nutrientaccumulationsand
7、seedyieldwereincreased2significantlyafterNapplication.With135kg/hmNapplicationrate,freshyield,N,P,Kaccumulationsandseed2yieldwereoptimal,reaching21350,67.17,11.62,87.05and993kg/hmrespectively.WithincreasedNapplicationrate,Nagronomicuse