Nkhani

Kwa alimi ambiri, urea ndi feteleza wachilengedwe chonse.Mbewu sizikukula bwino, taya urea;Masamba a mbewu asanduka achikasu ndipo urea wina waponyedwerapo;Ngakhale mbewu zitakula ndipo zipatso zake sizili bwino, onjezerani urea mwachangu;Ngakhale urea amagwiritsidwa ntchito ngati feteleza wamasamba.

Kodi urea amagwira ntchito bwanji?Ngati ntchito ndi cholinga cha urea sizidziwika bwino, zingayambitse kuyesayesa kawiri ndipo ngakhale kulephera kukwaniritsa zomwe mukufuna.Zikavuta kwambiri, zingakhudze kukula kwa mbewu, zomwe zimapangitsa kuchepetsa kapena kulephera kwa mbewu!
Aliyense amadziwa kuti urea ndi feteleza wa nayitrogeni wokhala ndi nayitrogeni wambiri.Chinthu chofunika kwambiri pakukula kwa mbeu ndi feteleza wa nayitrogeni.Chifukwa chake aliyense amakhulupirira kuti ngati kukula kwa mbewu sikuli koyenera, kudzakhala kopanda feteleza wa nayitrogeni.Kwenikweni, izi siziri choncho.Ngati mukudziwa ntchito ndi mphamvu ya feteleza wa nayitrogeni, mugwiritsa ntchito urea moyenera.
1: Katundu wa urea
Urea ndi feteleza wofunikira kwambiri ndipo ndi imodzi mwa feteleza wa nayitrogeni omwe amagwiritsidwa ntchito ndi alimi pa mbewu.Nayitrogeni mu urea ndi pafupifupi 46%, womwe ndi wapamwamba kwambiri pakati pa feteleza onse olimba.Urea ndi feteleza wosalowerera yemwe ali woyenera dothi losiyanasiyana komanso chomera chilichonse.Ndiosavuta kusunga, yosavuta kuyendamo, ndipo sichiwononga pang'ono nthaka.Panopa ndi feteleza wa nayitrogeni amene amagwiritsidwa ntchito kwambiri popanga ulimi.
2: Ntchito ndi Kugwiritsa Ntchito Urea
(1) Urea imatha kulimbikitsa kukula kwa mbewu.Nayitrogeni mu urea ndi imodzi mwazakudya zofunika pakukula ndi kukula kwa mbewu.Ngati mbewu ilibe feteleza wa nayitrogeni, idzawoneka ngati mtundu wa mbewuyo ndi wopepuka ndipo masamba akale m'munsi amasanduka achikasu;Zimayambira za mbewu zimakhala zoonda komanso zofooka;Nthambi zocheperako kapena zolima zimatsogolera ku kukalamba msanga kwa mbewu;Ngati feteleza wa nayitrogeni m’mitengo yazipatso mulibe kusowa, kungayambitse zikopa zazing’ono, zochepa, zokhuthala ndi zolimba.
(2) Urea imatha kulimbikitsa kukula kwa mphukira zatsopano panthawi yakukula kwa mbewu.Pa kukula kwa mbewu, kugwiritsa ntchito urea kumatha kulimbikitsa kukula kwa mphukira zatsopano mu mbewu, makamaka mitengo ya zipatso.Kugwiritsiridwa ntchito kwa urea mu mbewu kungalimbikitse nayitrogeni zomwe zili m'masamba a mbewu, kufulumizitsa kukula kwa mphukira zatsopano, ndikulepheretsa maluwa.
(3) Urea, monga fetereza wa masamba, amatha kuwonjezera feteleza ku mbewu ndikupha tizirombo.Kusungunula urea ndi chotsukira zovala m'madzi oyera ndi kupopera mbewu mankhwalawa pamasamba a mbewu kumatha kudzaza feteleza mwachangu ndikupha tizirombo tina.Kupha tizirombo tofewa monga nsabwe za m'masamba, nsabwe za m'masamba ndi akangaude ofiira kumafika pa 90%.Monga feteleza wosalowerera ndale, urea imatengedwa mosavuta ndi masamba ndipo imawononga pang'ono mbewu.