Cov kws tshawb fawb ntawm Aarhus University tau txheeb xyuas xya qhov tshwm sim ntawm cov nplej hauv paus ntsiab lus uas cuam tshuam cov kab mob nitrifying av zoo li hluavtaws nitrification inhibitors, qhib txoj hauv kev muaj peev xwm yug me nyuam mus rau cov hom qoob mog uas khaws cov nitrogen ntau dua yam tsis tas yuav muaj cov khoom siv tshuaj ntxiv lossis kev txi txi.
Cov teeb meem nitrogen ua liaj ua teb tseem tab tom ntsib
Tsawg tshaj li ib nrab ntawm nitrogen siv raws li cov chiv tau coj los ntawm cov qoob loo, nrog rau cov seem uas ploj lawm los ntawm kev nkag mus rau hauv cov dej los yog cov pa roj carbon monoxide tso rau hauv cov huab cua xws li nitrous oxide, lub tsev cog khoom muaj zog. Tau ntau xyoo lawm cov lus teb tseem ceeb tau txwv tsis pub siv cov nqi siv thiab cov khoom siv hluavtaws nitrification inhibitors, cov tshuaj uas ua rau qeeb cov microbial hloov pauv ntawm ammonium rau nitrate tab sis raug nqi, yuav tsum tau rov thov dua, thiab tuaj yeem cuam tshuam tsis yog - cov kab mob hauv av.
Pab pawg Aarhus, coj los ntawm tus kws tshawb fawb tom qab kws kho mob Purna Kumar Khatri, tshawb xyuas seb cov nplej nws tus kheej puas tuaj yeem ua tau ib qho qauv ntawm qhov kev ua haujlwm lom neeg. Lawv qhov chaw ua haujlwm yog nyob rau ntawm kev siv tshuaj lom neeg nitrification inhibition, ib txoj hauv kev uas cov cag ntoo tso tawm cov ntsiab lus ntuj uas cuam tshuam cov nitrifying microbes lub luag hauj lwm rau hloov ammonium rau hauv ntau leaching -prone nitrate daim ntawv.
benzoxazinoids yog dab tsi?
Benzoxazinoids yog cov metabolites theem nrab uas tsim los ntawm cov qoob loo xws li nplej, pobkws thiab rye, ib txwm kawm rau lawv lub luag haujlwm hauv kev tiv thaiv cov nroj tsuag tiv thaiv kab, nroj thiab nematodes. Cov kws tshawb fawb Aarhus tau tshuaj xyuas 18 qhov sib txawv ntawm benzoxazinoid compounds siv bioluminescence assay nrog Nitrosomonas europaea, tus qauv nitrifying kab mob, thiab pom xya - suav nrog BOA, MBOA, DIBOA thiab DIMBOA - muaj peev xwm tiv thaiv nitrification ntawm cov concentrations tsawg. Vim hais tias cov tebchaw no tsim thiab tso tawm los ntawm cov nroj tsuag nws tus kheej es tsis yog siv rau sab nraud, lawv muab cov txheej txheem sib txawv ntawm kev xa khoom ntau dua li cov khoom siv hluavtaws: tsis tu ncua, hauv zos tso tawm raws nraim qhov twg thiab thaum twg cov nroj tsuag xav tau los tiv thaiv muaj nitrogen.
Engineered nplej kab qhia tau hais tias cov nyhuv tuaj yeem nthuav dav
Txoj kev tshawb no tau muab piv rau cov kab niam txiv kab lus sib piv rau ob txoj kab nplej uas nqa cov chromosome feem ntawm Leymus racemosus, cov nyom nyom uas paub txog kev txhim kho cov roj ntsha nitrification inhibition. Loj hlob hydroponically, cov kab txhim kho tau tso tawm ntau dua ntawm cov nquag benzoxazinoids ntau dua li cov niam txiv kab, thiab lawv cov hauv paus exudates suppressed nitrification mus txog ob zaug li muaj zog - qhov tshwm sim uas cuam tshuam ncaj qha nrog ntau dua compound concentrations ntsuas.
Kev ua qauv qhia los ntawm cov kws tshawb fawb qhia txog kev lom neeg -nitrification-inhibition- cov qoob loo tuaj yeem txo cov nitrogen los ntawm 20% mus rau 30%, thiab kev sim ua ntej tsis tau pom tias tsis muaj txiaj ntsig cuam tshuam nrog qhov zoo, txhais tau tias cov neeg ua liaj ua teb tuaj yeem siv cov chiv tsawg dua thaum sau cov qoob loo sib piv. Khatri tau hais tias qhov loj ntawm lub sijhawm tseem ceeb txawm tias muaj txiaj ntsig zoo: "Yog tias koj tuaj yeem nce nitrogen- siv cov txiaj ntsig los ntawm kaum feem pua hauv cov xwm txheej tiag tiag, qhov kev txuag nyiaj hauv chiv thiab emissions yog qhov loj heev."
Los ntawm chemistry mus rau lub hom phiaj yug me nyuam
Lub hom phiaj ntev -Lub hom phiaj yog los txhais cov tshuaj tshawb pom rau hauv ib lub tswv yim kev yug me nyuam: ib zaug cov kws tshawb fawb txheeb xyuas cov txheej txheem biosynthetic uas tsim cov nitrification zoo tshaj plaws -inhibiting compounds, cog breeders tuaj yeem xaiv cov hom qoob mog uas qhia txog cov yam ntxwv zoo dua, tsis tas yuav cov neeg ua liaj ua teb hloov cov kev coj ua lossis yuav cov khoom siv tshiab. Cov kev tshawb fawb no yog ib feem ntawm qhov kev nthuav dav thoob ntiaj teb CropSustain project, nyob rau hauv uas cov pab pawg tshawb fawb tib yam tab tom kawm txog cov txiaj ntsig no cuam tshuam rau cov av microbiomes thiab tsis yog - cov kab mob hauv lub sijhawm ntev dua - ib lo lus nug uas tseem ceeb rau kev tswj hwm thiab kev lag luam uptake txawm tias lub hauv paus biology ua pov thawj muaj zog.
Cov kev tshawb pom tau tuaj txog vim tias kev lag luam thoob ntiaj teb nitrogen tseem tsis hloov pauv tom qab Strait of Hormuz cuam tshuam, uas xa cov nqi urea mus rau ze rau -cov ntaub ntawv siab dhau los xyoo no ua ntej kev kho ib nrab. Thaum lub sij hawm yug me nyuam rau nitrification-inhibiting nplej ntau yam khiav ntawm ib tug multi- lub xyoo qab ntug es tsis muab kev pab tam sim ntawd, cov kev tshawb fawb ntxiv rau ib tug loj hlob lub cev ntawm lom lwm txoj kev - nrog rau microbial nitrogen- kho cov khoom twb lag luam los ntawm tuam txhab uas muag nrog rau Pivot Bio kev vam khom {{6} tactic 's sectors yuav maj mam. inputs.
Txoj kev tshawb no, "Benzoxazinoids raws li cov neeg sib tw sib txuas rau kev lom neeg nitrification inhibition hauv cov nplej," tau luam tawm hauv Plant Physiology thiab Biochemistry thiab tau ua haujlwm nrog University of Copenhagen, University of Aberdeen, thiab Mexico's International Maize and Wheat Improvement Center (CIMMYT), uas muab cov khoom siv noob rau kev sim.
