Urea, inozivikanwawo se carbamide, inoumbwa nekabhoni, nitrogen, okisijeni, hydrogen organic komputa kristaro chena, parizvino ndiyo yakanyanya senitrogen inogadzirwa nenitrogen fetiraiza. Urea ine yakakwira nitrogen yezvinyorwa, chiyero chekushandisa hachifanirwe kunge chakanyanya kukura, kuitira kudzivirira marara asina basa uye "kukuvara kwefetiraiza". Varimi munzvimbo zhinji dzinobereka michero vanoshandisa yakawanda urea, zvichikonzera miti yakafa, mhedzisiro yacho yakanyanya. Nhasi tichazivisa kushandiswa kwakakodzera kweurea.

Shandisa urea gumi taboo 

Yakasanganiswa neammonium bicarbonate

Mushure mekunge urea yaiswa muvhu, inoda kushandurwa kuita ammonia isati yagona kudyiwa nezvirimwa, uye huwandu hwayo hwekushanduka hunononoka pasi pemamiriro ealkaline pane pasi pemamiriro eacidic. Mushure mekunge ammonium bicarbonate yaiswa muvhu, maitiro acho aive alkaline, uye iyo pH kukosha yaive 8.2 ~ 8.4. Kurima kusanganisa ammonium bicarboate uye urea, kuchaita kuti shanduko yeurea ive ammonia kumhanyisa yakadzora zvakanyanya, nyore kukonzera urea kurasikirwa uye volatilization kurasikirwa. Naizvozvo, urea neammonium bicarbonate hazvifanirwe kushandiswa mukubatana kana panguva imwe chete. 

Dzivisa kutepfenyura kwepamusoro

Urea inopararira pasi uye inogona chete kushandiswa mushure memazuva mana kusvika mashanu ekushandurwa mukamuri tembiricha. Yakawanda senitrogen iri nyore volatilized mune yekumonisesa maitiro, uye iyo chaiyo yekushandisa chiyero ingori ingangoita 30%. Kana ikapararira muvhu realkaline uye nevhu rine yakakwira organic zvinhu zvemukati, nitrogen kurasikirwa kuchakurumidza uye zvimwe. Uye urea kudzika kushanda, kuri nyore kupedzwa nemasora. Urea inoiswa yakadzika uye inonyungudutsa ivhu kuitira kuti fetiraiza ive muvhu rakanyorova, izvo zvinobatsira pamabatiro efetiraiza. Kupfeka kwepamusoro kunofanirwa kuitirwa padivi pembeu ine maburi kana migero, uye kudzika kunofanira kunge kuri 10-15cm. Nenzira iyi, urea inosunganidzwa mune rakakora dura remidzi, iro rinobatsira kufefetwa uye kushandiswa kwezvirimwa. Kuedza kwakaratidza kuti mwero wekushandisa werea unogona kuwedzerwa ne10% ~ 30%.

Zvitatu hazvirime fetiraiza

Urea mukugadzirwa, inowanzo gadzira shoma biuret, kana zvirimo zvebiuret zvinopfuura 2% zvichave zvine chepfu kune mbeu nembeu, dzakadai urea kuita mbeu nembeu, ichaita protein denaturation, inokanganisa kumera uye mhodzi kukura kwe mbeu, saka haina kukodzera kudyara fetiraiza. Kana ichifanira kushandiswa semushonga wembeu, dzivisa kusangana pakati pembeu nefotereza uye kudzora chipimo.

Vane vanodzivisa pakarepo mushure mekudiridza

Urea ndeye amide nitrogen fetiraiza, iyo inoda kushandurwa kuva ammonia nitrogen kuti inyurwe uye ishandiswe nemidzi yezvirimwa. Nekuda kwehunhu hwakasiyana hwevhu, mvura uye tembiricha mamiriro, iko kutendeuka kunotora nguva yakareba kana nguva pfupi. Kazhinji, inogona kupedzwa mushure memazuva maviri ~ gumi. Kazhinji, kudiridza kunofanira kuitwa 2 ~ 3 mazuva mushure mekushandisa muzhizha uye mumatsutso, uye mazuva manomwe kusvika masere mushure mekushandisa muchando uye muchirimo.