Urea urea: isicelo

Njalo wensimu ngizama ukuthuthukisa ikhwalithi izitshalo zabo, besebenzisa zonke izinhlobo fertilizer. Namuhla, esivame kakhulu carbamide (urea) equkethe yemifino organic nomhlabathi izakhi izithasiselo kanye nitrogen-ocebile.

Umlando omncane

urea eyaqala ukutholwa ngawo 1773 by usosayensi French Hillaire Rouelle, kodwa kusukela ngo-1828 kuphela yaqala ukukhiqiza synthetically. Ngempumelelo nitrogen Umanyolo carbamide (urea) ngefomu okumsulwa iqukethe kuze kufinyelele 46% of nitrogen, ziyoncibilika emanzini at pH olinganiselayo futhi akuyona anobuthi ukuba izitshalo nomhlabathi.

ukukhululwa Ifomu

Urea (carbamide) ikhiqizwa ezihlukahlukene:

• Ngesimo elimbudumbudu encane chaza kancane emhlabathini kuyakuvikela kusuka ukugcwaliswa nitrogen. Kulula ukudida nabanye Umanyolo, kuhlanganise organic.
• Ifomu eside amaphilisi encibilikayo camera ulwelwesi ekhethekile, bavikelekile nokonakala okusheshayo enhlabathini, okuyinto evimbela isivuno enhlabathini futhi nitration.

Carbamide: isicelo

Field ucwaningo ukukhombisa ukuthi ukusetshenziswa urea njengo manyolo pre-ukuhlwanyela kuvunyelwe ngokuphelele zonke izinhlobo nenhlabathi nangaphansi kwazo zonke izinhlobo zezilimo. Lapho le ukusebenza akuyona indlela kuthathelwe ammonium nitrate ammonium sulfate, futhi ngezinye izikhathi, isibonelo, nenhlabathi wapheka-podsolic nge umswakama ngokwanele futhi serozem eniselwayo, ihlinzeka acebile amazambane nemifino izitshalo. Isetshenziswa njengesici avale phezulu ngoba izitshalo ebusika e kwentwasahlobo, futhi wemigqa izitshalo nemifino zokutshala ngokushesha ukuvimbela nitrogen ukulahlekelwa ukuhwamuka of ammonia imiswe phakathi noqhekeko fertilizer. Ukuze izitshalo foliar Kunconywa crystalline okufana biuret okuqukethwe ukuba 0.2-0.3%.

izinzuzo

Lokhu Umanyolo nitrogen kunezinzuzo phezu nezinye umquba. Urea (carbamide) amuncwa umzimba amasiko kahle, futhi emakamu eliphezulu (1% isixazululo) ubulala isitshalo futhi akabi amaqabunga. Lapho ukukhuliswa amuncwa leaf amaseli baliklasi lonkhe molecule futhi ingafakwa amuncwa noqhekeko ngaphansi isenzo urease enzyme noma ammonia ukwakha kugucuka diamino iluphu izinto nitrogen. Nokho, ngokweqile ammonia khulula ezonini impande siyehla ukuhluma futhi ihlumela, ngakho kudingeka ube okunengqondo kakhulu ekwenzeni urea ukuze umhlabathi ukuhlwanyelwa noma ngokulinganayo wokuyidlulisela.

izincomo

Ngaphambi kwalokho urea enhlabathini kahle Kunconywa ukuba uhlanganise nabanye izithasiselo noma isihlabathi esomile. Lapho zisetshenziswe ngendlela efanele, urea luyimbudumbudu (carbamide) kuyinto enhle kakhulu nitrogen umquba. Konke lokhu sibonga izakhiwo ezinhle ngokomzimba kanye okuqukethwe eliphezulu nitrogen ngezithako zawo. Njengoba kungenzeka ukusebenzisa nganoma iyiphi inhlabathi, futhi kuye kwaba nomphumela omuhle ku ukukhula kwezitshalo, isidingo salokhu Umanyolo jikelele lukhula isizini ngayinye, futhi ngenxa yalokho, ukukhiqizwa yayo iyakhula.