資源描述：
《有機高氮肥的施用對菠菜生長及土壤供氮能力的影響》由會員上傳分享，免費在線閱讀，更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫。
1、南京農(nóng)業(yè)大學(xué)學(xué)報 2004,27(2):60～63JournalofNanjingAgriculturalUniversity有機高氮肥的施用對菠菜生長及土壤供氮能力的影響11312楊春悅,沈其榮,徐陽春,常志州(11南京農(nóng)業(yè)大學(xué)資源與環(huán)境科學(xué)學(xué)院,江蘇南京210095;21江蘇省農(nóng)業(yè)科學(xué)院,江蘇南京210014)摘要:通過盆栽試驗,研究了有機高氮肥的施用對菠菜生長及土壤供氮能力的影響。結(jié)果表明:與對照相比,2種有機高氮肥分別單施和配施,菠菜產(chǎn)量和累積吸氮量均較高,與單施尿素的處理相比,菠菜生長后期的長勢更加旺盛,吸氮速率增加
2、的更快;施用有機高氮肥能改善土壤氮素供應(yīng)狀況和供氮過程,在菠菜生長后期(播種后28～42d)為菠菜提供了充足的礦質(zhì)氮;播種14d后,有機高氮肥的施用能明顯增加土壤微生物量氮,增加幅度大于單施尿素處理,因此提高了土壤的供氮能力。上述結(jié)果表明,施用有機高氮肥有可能獲得與施用化肥相當?shù)漠a(chǎn)量,這為生產(chǎn)有機食品專用肥料提供了技術(shù)途徑。關(guān)鍵詞:有機高氮肥;菠菜;土壤供氮中圖分類號:S14715;S15813文獻標識碼:A文章編號:10002030(2004)02006004Effectofapplicationoforganicferti
3、lizerwithhighnitrogencontentongrowthofspinachandsoilnitrogensupply11312YANGChun2yue,SHENQi2rong,XUYang2chun,CHANGZhi2zhou(11CollegeofResourcesandEnvironmentalSciences,NanjingAgriculturalUniversity,Nanjing210095,China;21JiangsuAcademyofAgriculturalSciences,Nanjing210
4、014,China)Abstract:Apotexperimentwascarriedout.TheresultsshowedthatfreshweightofspinachontheapplicationoftheorganicfertilizerswassignificantlyhigherthanthatofCK,andthegrowthrateandnitrogenabsorptionofspinachwerehigherthanthoseinthetreatmentwithureaaloneduringthelate
5、rgrowthperiod(5thMayto19thMay)ofspinach.ThemineralNcontentofthesoiladdedwithorganicfertilizerswasenhancedsteadilyduringthewholegrowthperiod(7thAprilto19thMay)ofspinach,whilethatintheureaapplicationalonewasfarmorethantherequirementforthegrowthofspinach,beingatlargerr
6、iskofnitrogenloss.ThecontentofsoilmicrobialbiomassNwassignifi2cantlyincreasedwhenthesoilwasfertilizedandtheincreasedextentintheapplicationoforganicfertilizerswaslargerthanthatintheappli2cationofureaalone.Toconclude,theapplicationoforganicfertilizerscouldimprovetheso
7、ilnitrogensupplyingcharacteristicsandsyn2chronizethesoilnitrogensupplyingprocesswiththerequirementbyspinach.Almostthesameyieldsofspinachcouldbeobtainedintheap2plicationoforganicfertilizersasthatinureaapplicationalone.Therefore,theresultsobtainedinthepresentexperimen
8、tensurethatitispossibletogethighyieldsbyapplyingorganicfertilizerswithhighnitrogencontenttosoilintheorganicfarming.Keywords:organicfertili
