Xov xwm

Nyob rau hauv lub qhov muag ntawm ntau tus neeg ua liaj ua teb, urea yog ib qho chiv thoob ntiaj teb. Cov qoob loo tsis loj hlob zoo, muab qee qhov urea pov tseg; Cov nplooj ntawm cov qoob loo tau tig daj thiab qee qhov urea tau muab pov rau ntawm lawv; Txawm hais tias cov qoob loo yog fruiting thiab fruiting nyhuv tsis zoo tagnrho, sai sai ntxiv ib co urea; Txawm tias urea yog siv los ua foliar chiv.

Lub luag haujlwm ntawm urea yog dab tsi? Yog tias qhov ua haujlwm thiab lub hom phiaj ntawm urea tsis meej, nws yuav ua rau ob zaug ntawm kev siv zog thiab txawm tias tsis ua tiav cov txiaj ntsig xav tau. Thaum mob hnyav, nws tuaj yeem cuam tshuam rau kev loj hlob ntawm cov qoob loo, ua rau cov qoob loo txo ​​qis lossis txawm tias qoob loo tsis ua haujlwm!
Txhua tus paub tias urea yog nitrogen chiv nrog cov ntsiab lus siab nitrogen. Lub ntsiab tseem ceeb tshaj plaws uas yuav tsum tau muaj rau kev loj hlob qoob loo yog nitrogen chiv. Yog li ntawd txhua leej txhua tus ntseeg hais tias yog hais tias cov qoob loo loj hlob tsis zoo tagnrho, nws yuav twv yuav raug hu tsis muaj nitrogen chiv. Qhov tseeb, qhov no tsis yog qhov xwm txheej. Yog tias koj paub lub luag haujlwm thiab kev ua tau zoo ntawm nitrogen chiv, koj yuav siv cov urea tsim nyog.
1: Cov khoom ntawm urea
Urea yog ib qho tseem ceeb heev chiv thiab ib qho ntawm feem ntau nitrogen chiv siv los ntawm cov neeg ua liaj ua teb rau cov qoob loo. Cov ntsiab lus nitrogen hauv urea yog nyob ib ncig ntawm 46%, uas yog qhov siab tshaj plaws ntawm tag nrho cov khoom chiv. Urea yog ib qho av nruab nrab uas tsim nyog rau ntau yam av thiab rau txhua yam nroj tsuag. Nws yog ib qho yooj yim khaws cia, yooj yim rau kev thauj mus los, thiab tsis muaj kev puas tsuaj rau cov av. Nws yog tam sim no feem ntau siv nitrogen chiv hauv kev ua liaj ua teb.
2: Kev ua haujlwm thiab kev siv urea
(1) Urea tuaj yeem txhawb cov qoob loo loj hlob. Cov khoom nitrogen hauv urea yog ib qho tseem ceeb ntawm cov khoom noj rau cov qoob loo loj hlob thiab kev loj hlob. Yog tias cov qoob loo tsis muaj nitrogen chiv, nws yuav tshwm sim raws li cov nroj tsuag xim sib dua thiab cov nplooj qub ntawm lub hauv paus tig daj; Cov stems ntawm cov qoob loo yog nyias thiab tsis muaj zog; Tsawg ceg lossis tillers ua rau cov qoob loo ntxov ntxov; Yog tias tsis muaj nitrogen chiv hauv cov txiv hmab txiv ntoo, nws tuaj yeem ua rau me me, ob peb, tuab, thiab tawv txiv hmab txiv ntoo tawv.
(2) Urea tuaj yeem txhawb txoj kev loj hlob ntawm cov tua tshiab thaum lub sij hawm loj hlob ntawm cov qoob loo. Thaum lub sij hawm loj hlob ntawm cov qoob loo, kev siv urea tuaj yeem txhawb txoj kev loj hlob ntawm cov qoob loo tshiab, tshwj xeeb tshaj yog cov ntoo txiv ntoo. Kev siv urea hauv cov qoob loo tuaj yeem txhawb nqa cov ntsiab lus nitrogen ntawm cov nplooj qoob loo, ua kom txoj kev loj hlob ntawm cov nroj tsuag tshiab, thiab inhibit paj buds.
(3) Urea, raws li foliar chiv, tuaj yeem ntxiv cov qoob loo nrog chiv thaum tua kab. Dissolving urea thiab ntxhua khaub ncaws ntxhua khaub ncaws hauv dej huv thiab txau rau ntawm nplooj ntawm cov qoob loo tuaj yeem ntxiv cov chiv sai sai thiab tua tau qee cov kab tsuag. Kev tua cov kab mos mos xws li kab laug sab, aphids, thiab kab laug sab liab nce mus txog 90%. Raws li cov chiv nruab nrab, urea tau yooj yim nqus los ntawm nplooj thiab muaj kev puas tsuaj me me rau cov qoob loo.