Momwe alimi angadulire mpweya wowonjezera kutentha ndi mpweya wa ammonia

Kugwiritsa ntchito feteleza woteteza urogen wa nayitrogeni ndiye njira yayikulu kwambiri yomwe ikupezeka kuulimi waku Ireland kuti ikwaniritse zomwe zatsimikizika zochepetsa mpweya wa GHG ndi ammonia.

Urea wotetezedwa ndi urea amachizidwa ndi chinthu chogwira ntchito chotchedwa urease inhibitor. Woletsa urease amatha wokutidwa kunja kwa feteleza wa feteleza kapena kuphatikizidwa mu urea granule popanga.

Ayi, chifukwa kutembenuka kwa urea wotetezedwa kukhala ammonium kumayamba pomwe granule wa feteleza wayamba kusungunuka.

Zotsatira zake ndikuti kutembenuka kumachitika masiku angapo osati maora ochepa, monga momwe zimakhalira ndi urea wamba.

Kumbukirani, pamene feteleza N amathiridwa m'nthaka, cholinga chake ndikupereka udzu kapena mbeu ndi N kwa masiku angapo mpaka milungu, osati maola.

Inde, zinthu zotsatirazi zimadziwika kuti zimagwira bwino ntchito ngati urease inhibitors: NBPT, 2-NPT, NBPT + NPPT.

Teagasc yachita kafukufuku ndi njira zonse zitatu zoletsera, makamaka ndi NBPT ndi NBPT + NPPT.

Inde, mutha kufalitsa urea wotetezedwa nthawi yonse yokula pamene mungafalitse calcium ammonium nitrate (CAN) kapena urea wopanda chitetezo.

Izi zitha kupangitsa kuti feteleza afalikire pafamuyo, ndikukhazikitsa chofalitsa cha feteleza pachinthu chimodzi chokha chowongoka-N chaka chilichonse.

Ayi, mayesero omwe adasindikizidwa ku Teagasc awonetsa kutetezedwa kwa urea mowirikiza komanso CAN m'madambo aku Ireland, popanda kusiyana pakapangidwe pachaka.

Kuwunika kwamitengo mu Marichi 2019 kunawonetsa urea yotetezedwa kukhala yotsika mtengo kuposa CAN, pomwe ikuchita bwino potengera zokolola komanso kuchira kwa N.

Kumbukirani kuti feteleza amatuluka mosiyanasiyana, koma nthawi zonse pangani kufananiza pamtengo pamtengo wa kg ya N pazinthu zowongoka za N.

Inde, mayesero omwe adasindikizidwa ku Teagasc awonetsa kuti urea yotetezedwa ili ndi 71% yotulutsa mpweya wa nitrous oxide kuposa CAN.

Inde, kutengera kafukufuku wofalitsidwa ku Teagasc, urea yotetezedwa ili ndi kutayika kwa ammonia poyerekeza ndi CAN, ndipo kutayika kwa ammonia kumachepetsedwa ndi 79% poyerekeza ndi urea.

Urea wotetezedwa samapereka N mwachindunji ngati nitrate m'nthaka, motero kumachepetsa chiopsezo cha kutayika kwa nitrate komwe kumachitika ndi mvula pambuyo pothira feteleza.

Kuchepetsa kutayika kwa ammonia poyerekeza ndi urea kumathandizanso kuchepetsa ngozi ya ammonia N kuyikidwa m'mlengalenga m'malo okhala osawoneka bwino kapena m'matupi amadzi ovuta.

Ngakhale palibe mndandanda wotsimikizika womwe wavomerezedwa ndi department of Agriculture, Food and the Marine (DAFM), tebulo lomwe likutsatirali likuwonetsa mndandanda wazinthu zomwe zawonetsa mphamvu zochepetsera mpweya.

Urea yatetezedwa ndi zopangira zomwe NBPT, 2-NPT, ndi NBPT + NPPT zawonetsedwa kuti ndizothandiza poteteza urea ku Ireland komanso / kapena kafukufuku wapadziko lonse lapansi.

Ngati inhibitor itha kutetezedwa kuti isakhudzidwe ndi acidity yomwe nthawi zambiri imabwera ndi P kuphatikiza, mwina inde. Funsani wogulitsa kuti akuwonetseni umboni kuti P kuphatikiza sikukhudza chitetezo.

Komabe, yoteteza urea yothandizidwa ndikugwiritsidwa ntchito mkati mwa miyezi isanu ndi umodzi mpaka 12 iyenera kukhala yothandiza kwambiri.

Ngakhale komwe kusokonekera kumachepetsa NBPT pansi pamlingo woyenera wophatikizira, urea idzatetezedwabe.

Inde, zotsatira zoyeserera ku Ireland sizikuwonetsa kukolola kulikonse kapena N kuchira pakati pa CAN ndi urea yotetezedwa ndi NBPT. Komabe, ngati mikhalidwe yauma ndikukhalabe, kuyankha feteleza aliyense N kudzakhala kochepa. Chifukwa chake ngati mukuzengereza kufalitsa CAN, muyeneranso kukhala osazengereza kufalitsa urea wotetezedwa. Ganizirani zodikirira mvula ndi kukula kuti zibwerere.

Ndiosakanikirana kwambiri kuposa feteleza wina, zomwe zimapangitsa kuti zipeze chinyezi, ngati wobalalitsa asakutsukidwe.


Post nthawi: Oct-28-2019
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