Qhov zoo tshaj plaws nitrogen tus nqi rau carrots nyob rau hauv tej teb tej zaum yuav tsawg tshaj li qhov pom zoo pom zoo. Qhov no yog qhov xaus los ntawm cov kws tshawb fawb ntawm University of California raws li cov txiaj ntsig ntawm kev tshawb fawb. Cov ntaub ntawv no yog qhov tseem ceeb tiv thaiv keeb kwm yav dhau los ntawm kev nce nqi rau cov ntxhia chiv thoob plaws ntiaj teb.
Feem ntau cov neeg cog qoob loo siv cov chiv nitrogen ntau dua li qhov xav tau. Txawm hais tias carrots yuav tsum tau tshwj xeeb loj hlob tej yam kev mob thiab ib tug txaus tus nqi ntawm cov ntxhia nitrogen thiab dej, qhov ntau dhau tsis muaj txiaj ntsig rau kab lis kev cai. Carrots muaj ib tug tob thiab branched hauv paus system, yog li ntawd lawv muaj peev xwm nkag mus rau cov seem nitrogen ntawm lub caij dhau los, uas tau mus tob rau hauv cov av profile.
Qhov xav tau nitrogen ntawm carrots rau kev pom cov hauv paus qoob loo yields nyob ntawm kev nyab xeeb, hom av thiab seem nitrogen hauv cov av.
Kev txo cov qoob loo feem ntau tuaj yeem pom tau thaum siv tshuaj nitrogen ntau ntau thaum lub sijhawm cog, yog li kev siv cov chiv tso tawm qeeb yog qhov zoo dua los ntawm kev tsim khoom thiab ib puag ncig kev pom.
Kev ywg dej ntau dhau ua rau muaj ntau yam deformations ntawm carrot cag, yog li ntawd, nws yog ib qho tsim nyog yuav tsum ua tib zoo tswj cov dej hauv lub caij cog qoob loo. Txawm hais tias nitrogen fertilization tsis ua rau cov qoob loo siv dej ntau ntxiv vim tias thaj chaw nplooj ntoo nce ntxiv, nws ua rau muaj kev siv dej ntau ntxiv txog li 120 kg nitrogen ib hectare.
Kev tshawb fawb los ntawm Asmeskas cov kws tshawb fawb tau pom tias cov qoob loo siab tshaj plaws ntawm cov cag qoob loo tau ua tiav ntawm cov xuab zeb thiab loamy xau nrog 75% ntawm cov av noo ntawm thaj teb thiab kev siv ntawm 150 kg ntawm nitrogen ib hectare.
Nitrogen uptake hauv carrots feem ntau qis hauv thawj 40-50 hnub, yog li cov neeg cog qoob loo tau qhia kom txwv tsis pub lawv fertilization nyob rau lub sijhawm no. Thaum nquag watering yog pom zoo nyob rau tib lub sij hawm, nws yog tsim nyog los tswj tus nqi ntawm cov dej nrog txhua watering kom txo tau cov leaching ntawm residual nitrogen. Tom qab tag nrho, nws txoj kev koom tes tuaj yeem yog qhov tseem ceeb, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig monoculture.
Cov txiaj ntsig ntawm txoj kev tshawb fawb tau pom tias muaj cov nitrogen tseem ceeb hauv cov zaub ntug hauv paus thaum sau qoob loo, uas tuaj yeem ua rau muaj qhov nruab nrab ntawm 42-44% ntawm tag nrho cov nitrogen hauv cov nroj tsuag (sab saum toj thiab hauv paus) hauv lub caij tom ntej.
Nws raug nquahu kom nco ntsoov ua qhov kev ntsuam xyuas ua ntej ntawm cov ntsiab lus nitrogen ntawm cov av mus rau qhov tob ntawm 60 cm thiab tom qab ntawd rov xam cov nqi ntawm daim ntawv thov raws li cov ntaub ntawv no. Qhov kev xyaum no yog ib qho cuab yeej zoo tshaj plaws rau kev nce cov txiaj ntsig thiab txhim kho qhov zoo ntawm tus nqi qis tshaj kev lag luam thiab ib puag ncig.