資源描述:
《施氮量對(duì)旱地胡麻養(yǎng)分積累、轉(zhuǎn)運(yùn)及氮素利用率的影響.pdf》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在應(yīng)用文檔-天天文庫(kù)。
1、中國(guó)油料作物學(xué)報(bào)2014,36(3):357—362ChineseJournalofOilCropSciencesdoi:10.7505/j.issn.1007—9084.2014.03.010施氮量對(duì)旱地胡麻養(yǎng)分積累、轉(zhuǎn)運(yùn)及氮素利用率的影響謝亞萍,吳兵,牛俊義,孫芳霞,宋滿剛(1.甘肅農(nóng)業(yè)大學(xué)農(nóng)學(xué)院,甘肅蘭州,730070;2.鄂爾多斯市農(nóng)業(yè)科學(xué)研究所,內(nèi)蒙古東勝,017000)摘要:通過(guò)田間試驗(yàn),研究不同施氮量對(duì)胡麻產(chǎn)量、氮素積累轉(zhuǎn)運(yùn)及氮肥利用率的影響。結(jié)果表明,在本試驗(yàn)土壤肥力條件下,無(wú)論施氮與否,胡麻各器官不同生育階段氮素養(yǎng)
2、分吸收、累積和轉(zhuǎn)運(yùn)規(guī)律的基本趨勢(shì)一致,但其變化量與施氮量有極大關(guān)系。施氮量為55.2kg·hm時(shí),葉和莖中的氮素向籽粒的轉(zhuǎn)移量、轉(zhuǎn)移率及對(duì)籽粒氮素的貢獻(xiàn)率最大;葉中氮素向籽粒的轉(zhuǎn)移量、轉(zhuǎn)移率及貢獻(xiàn)率要比莖高出89.18%、83.36%和86.36%。胡麻籽粒中47.10%一57.66%的氮素來(lái)源于葉,22.46%~30.94%的氮素來(lái)源于莖,21.00%~30.48%來(lái)自籽粒生長(zhǎng)后期從土壤中吸收。施氮量為27.6、55.2、82.3kg·hm時(shí),胡麻籽粒產(chǎn)量分別比不施氮增加了O.21%、16.92%和15.55%。施氮量為27.6~
3、55.2kg·hmI2時(shí),氮肥的表觀利用率、偏生產(chǎn)力分別為51.10%~68.63%和51.54~97.16kg·kg~。本試驗(yàn)條件下,綜合考慮產(chǎn)量、氮肥利用率及生態(tài)環(huán)境,施氮量在27.6—55.2kg·hm為宜。關(guān)鍵詞:氮;旱地胡麻;積累;轉(zhuǎn)運(yùn);氮素利用效率中圖分類號(hào):$565.906文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1007—9084(2014)03—0357—06Efectofdiferentnitrogenlevelonnutrientsaccumulation.transferandnitrogenutilizationeficie
4、ncyofdrylandoilflaxXIEYa—ping,WUBing。,NIUJun—yi,SUNFang—xia,SONGMan—gang(1.AgronomyCollege,GansuAgriculturalUniversity,Lanzhou730070,China;2.OrdosInstituteofAgriculturalSciences,Dongsheng017000,China)Abstract:Fieldexperimentswerecarriedouttodeterminetheeffectofdifferen
5、tnitrogenapplicationratesonnitrogennutrientuptake,transferandnitrogenutilizationeficiencyofdrylandoilflax.Theresultsindicatedthatdifferentnitrogenapplicationratesaffectednitrogennutrientuptake,accumulationandtransferatdifferentgrowthstages,andchangestendencieswereconsi
6、stant.Theamountofnitrogentranslocationfromleaf,translocationeffi—ciencyandcontributiontograinwere89.18%,83.36%and86.36%higherthanfromstem.Thenitrogeningrain,amongwhich47.10%一57.66%wastransferredfromleaf,22.46%一30.94%wastransferredfromstemand21.00%一30.48%wasabsorbedfrom
7、soil.Theresultindicatedthatcomparedtononitrogenapplication,theyieldofnitrogentreatments(as27.6,55.2and82.8kg·hm)increased10.21%,16.92%and15.55%,re-spectively.Thenitrogentransferamounts,transferefficiencyandcontributionefficiencyofleafandstemtograinweremaximumwhenthenit
8、rogenapplicationratewas55.2kg·hm-2.Withincreasednitrogenapplicationrate.a(chǎn)pparentnitrogenrecoveryeficiencyofoilflaxfir