Urea isichumiso sesityalo esidla ngokufuna ukufakwa. Umsebenzi wawo ophambili kukushiya izinto eziyingozi emhlabeni, kwaye ukusetyenziswa kwexesha elide akunaziphumo zibi. Kwimizi-mveliso, i-ammonia engamanzi kunye nekhabhon diokside zisetyenziswa njengezinto ezingafunekiyo ukuzenza ngokuthe ngqourea phantsi kobushushu obuphezulu kunye neemeko zoxinzelelo oluphezulu. Ukongeza ekusebenziseni isichumisi esenziwe ngemichiza,urea Ingasetyenziselwa ngobuninzi bezinye iimveliso zeekhemikhali, amayeza, ukutya, izinyibilikisi zedayi, izifunxi zomswakama, kunye ne-viscose fiber eyandisayo, iarhente yokugqiba i-Resin, injini yedizili yokukhupha unyango lwegesi kunye nezinye izinto zemveliso.

Amanyathelo okhuseleko ekusetyenzisweni kwe urea:

1. Urea ilungele isichumiso esisisiseko kunye nokunxiba okuphezulu, kwaye ngamanye amaxesha njengesichumiso sembewu. Ilungele zonke izityalo nayo yonke imihlaba. Ingasetyenziselwa isichumiso esisisiseko kunye nokunxiba okuphezulu. Ingasetyenziselwa kwimihlaba eyomileyo ye-paddy. Kwimihlaba ye-alkaline okanye i-alkaline,urea I-hydrolyzed ukuze ivelise i-ammonium nitrogen, kunye nokusetyenziswa komhlaba kuya kubangela i-ammonia volatilization, ke umhlaba ofunekayo kufuneka ugqitywe

2. Emva urea Ufafazwe kumphezulu wedlelo ledydy, i-ammonia volatilization emva kwe-hydrolysis yi-10% -30%. Kumhlaba wealkaline, ilahleko ye-nitrogen yi-ammonia volatilization yi-12% -60%. Phantsi kobushushu obuphezulu kunye nokufuma okuphezulu, i-ammonia volatilization ofurea ingazitshisa izityalo kwaye ikhawulezise umyinge wenitrification. Ke ngoko, kubaluleke kakhulu ukufaka isicelourea nzulu kwaye usebenzise amanzi ukuhambisa isichumisi.

3. Ngoba urea inokuqokelela isixa esikhulu se-ion ze-ammonium emhlabeni, iya kuyonyusa i-pH ngeeyunithi ezi-2-3. Ukwengeza,urea uqobo luqulathe isixa esithile se-biuret. Xa uxinzelelo lwayo luyi-500ppm, iya kuchaphazela izityalo. Iingcambu kunye namahlumela aneziphumo zokuthintela, keurea akukho lula ukuba isetyenziswe njengesichumisi sembewu, isichumiso sembewu nesichumiso se foliar. Inkqubo ye-urea umxholo kwamanye amaxesha esicelo akufuneki ubengaphezulu kakhulu okanye kugxilwe kakhulu. Emva kokuba izityalo zesigaba sezithole zonakaliswe yi-biuret, izithintelo ze-chlorophyll synthesis ziyenziwa, kwaye amagqabi avela njenge-chlorosis, i-yellowing kunye ne-whitening whitening or stripes.

4. Urea ayinakuxutywa nezichumiso zealkali. Emvaurea siyasebenza, kufuneka siguqulwe sibe yi-ammonium nitrogen ngaphambi kokuba sisetyenziswe zizityalo. Phantsi kweemeko zealkali, uninzi lwe-nitrogen kwi-ammonium nitrogen iya kuba yi-ammonia kunye ne-volatilize. Ke ngoko,urea ayinakudityaniswa nomlotha wesityalo, isichumiso se-calcium magnesium phosphate, ikhabhoni exutywayo okanye isicelo ngaxeshanye sezichumisi zealkali ezifana neammonium.

Yintoni umphumo we urea ekukhuleni kwezityalo kunye nendlela yokuyisebenzisa?

1. Indima ye urea kukuhlengahlengisa isixa seentyatyambo. Iiveki ezi-5-6 emva kweentyatyambo, tshiza i-0.5%urea isisombululo samanzi kumphezulu wamagqabi amaxesha ama-2, anokunyusa umxholo we-nitrogen wamagqabi, akhawulezise ukukhula kwamahlumela amatsha, athintele ukwahlulahluma kweentyatyambo, kwaye enze ubungakanani beentyatyambo zonyaka kufanelekile.

2. Beka kuqala izityalo zakho eziphambili. Xa ufaka isicelo, izityalo ezinendawo yokutyala enkulu kunye nexabiso eliphezulu kwezoqoqosho (ezifana nengqolowa nombona) kufuneka ziqwalaselwe kuqala. Kwizityalo eziziisekondari ezifana ne-buckwheat, ungasebenzisa isicelo esincinci ngokweemeko zakho zoqoqosho. Okanye ungayisebenzisi, kwaye unike umdlalo opheleleyo kwisichumiso ekwandiseni imveliso. Sebenzisa isichumiso esisisiseko okanye isinxibo saphezulu.Urea ilungele ukusetyenziswa njengesichumisi esisisiseko kunye nokunxiba okuphezulu. Ngokubanzi, ayisetyenziswa njengesichumisi sembewu.

3. Faka isicelo kwangaphambili. Emvaurea sifakwa emhlabeni, siqala sifakwe ihydrolyzed kwi bicarbonate ye ammonium sisenzo seentsholongwane zomhlaba phambi kokuba sifunxwe zingcambu zezityalo. Ke ngoko, kufuneka isetyenziswe kwangaphambili. Faka isicelourea emva kwemvula kangangoko kunokwenzeka ukuba ube nokusebenza kakuhle kokufakwa kokufuma. Xa ufaka ilokhwe kumhlaba owomileyo, zama ukuyilungisa emva kwemvula ukuze isichumisi sikwazi ukunyibilika msinya sifunxwe ngumhlaba.
4. Ukuba urea igcinwe ngendlela engafanelekanga, izakufunxa lula ukufuma kunye ne-agglomerate, eya kuchaphazela umgangatho wokuqala we urea kunye nokuzisa ilahleko ezithile zoqoqosho kumafama. Oku kufuna ukuba amafama agcineurea ngokuchanekileyo. Qiniseka ukuba uyigcinaurea ibhegi yokupakisha ihambile phambi kokusetyenziswa, yiphathe ngononophelo ngexesha lokuhamba, thintela imvula, kwaye uyigcine kwindawo eyomileyo, enomoya kwaye enobushushu obungaphantsi kweedigri ezingama-20.

5. Ukuba isixa esikhulu sokugcina, sebenzisa isikwere somthi ukusongelwa ezantsi malunga ne-20 cm, kwaye ushiye isithuba esingaphezulu kwama-50 cm phakathi kwendawo ephezulu nophahla ukuququzelela umoya ongenisa ukufuma, nokushiya iiphaseji phakathi izitokhwe. Ukuququzelela ukuhlolwa kunye nokungena komoya. Ukubaurea esele ivuliwe engxoweni ayisetyenziswanga, ukuvulwa kwengxowa kufuneka kutywinwe ngexesha ukulungiselela ukusetyenziswa konyaka olandelayo.