Raws li cov chiv uas nquag siv, urea tau txhawj xeeb txog nws txoj kev loj hlob. Tam sim no, urea ntawm kev ua lag luam tau muab faib ua cov khoom loj thiab cov khoom me me. Feem ntau hais lus, urea nrog cov kab uas hla ntau dua 2 hli yog hu ua loj granular urea. Qhov sib txawv ntawm qhov loj me yog vim qhov sib txawv ntawm cov txheej txheem granulation thiab cov khoom siv tom qab urea ntau lawm hauv lub hoobkas. Dab tsi yog qhov txawv ntawm qhov loj ntawm urea thiab me me granular urea?
Ua ntej, qhov zoo sib xws ntawm cov loj thiab me me granular urea yog tias lawv cov khoom xyaw nquag yog cov dej-soluble ceev-acting urea molecule nrog cov ntsiab lus nitrogen ntawm 46%. Los ntawm qhov pom ntawm physics, qhov sib txawv tsuas yog qhov loj me. Loj-grained urea muaj plua plav cov ntsiab lus, siab compressive zog, zoo fluidity, yuav thauj tau nyob rau hauv tej, tsis yooj yim rau tawg thiab agglomerate, thiab yog haum rau mechanized fertilization.
Qhov thib ob, los ntawm qhov kev xav ntawm fertilization, thaj tsam ntawm cov urea me me yog qhov loj dua, qhov kev sib cuag ntawm cov dej thiab cov av loj dua tom qab thov, thiab qhov kev sib cais thiab kev tso tawm sai dua. Lub dissolution thiab tso tus nqi ntawm loj particle urea nyob rau hauv cov av yog me ntsis qeeb. Feem ntau, tsis muaj qhov sib txawv me ntsis hauv kev ua haujlwm ntawm cov chiv ntawm ob.
Qhov sib txawv no tau tshwm sim hauv txoj kev siv. Piv txwv li, nyob rau hauv tus txheej txheem ntawm topdressing, cov chiv nyhuv ntawm me me granular urea yog me ntsis sai dua li ntawm loj granular urea. Los ntawm qhov kev xav ntawm kev poob, qhov poob ntawm cov pob zeb loj urea tsawg dua li ntawm cov me me granular urea, thiab cov ntsiab lus ntawm diurea hauv cov pob zeb loj urea qis dua, uas muaj txiaj ntsig zoo rau cov qoob loo.
Ntawm qhov tod tes, rau kev nqus thiab siv cov qoob loo, urea yog molecular nitrogen, uas ncaj qha absorbed los ntawm cov qoob loo nyob rau hauv ib tug me me npaum li cas, thiab tsuas yog absorbed nyob rau hauv loj qhov ntau tom qab hloov mus rau ammonium nitrogen nyob rau hauv cov av. Yog li ntawd, tsis hais qhov loj ntawm urea, topdressing yog ob peb hnub ua ntej tshaj ammonium bicarbonate. Tsis tas li ntawd, qhov loj me ntawm cov pob zeb loj urea zoo ib yam li diammonium phosphate, yog li cov pob zeb loj urea tuaj yeem tov nrog diammonium phosphate ua lub hauv paus chiv, thiab nws yog qhov zoo tshaj plaws tsis txhob siv cov pob zeb loj urea rau saum hnav khaub ncaws.
Lub dissolution tus nqi ntawm loj granular urea yog qeeb me ntsis, uas yog haum rau lub hauv paus chiv, tsis yog rau topdressing thiab flushing fertilization. Nws qhov loj me me sib luag ntawm diammonium phosphate thiab tuaj yeem siv los ua cov khoom siv sib xyaw ua chiv. Nws yuav tsum tau muab sau tseg ntawm no hais tias loj granular urea tsis tuaj yeem tov nrog ammonium nitrate, sodium nitrate, ammonium bicarbonate thiab lwm yam hygroscopic chiv.
Los ntawm kev ntsuam xyuas cov chiv ntawm cov pob zeb loj urea thiab zoo tib yam me me granular urea ntawm paj rwb, cov nyhuv ntawm cov pob zeb loj urea ntawm paj rwb qhia tau hais tias cov yam ntxwv ntawm kev lag luam, cov txiaj ntsig thiab cov txiaj ntsig ntawm cov pob zeb loj urea yog qhov zoo dua li me me granular urea, uas tuaj yeem txhawb nqa cov khoom lag luam. ruaj khov kev loj hlob ntawm paj rwb thiab tiv thaiv Premature aging ntawm paj rwb txo tus nqi ntawm cov paj rwb buds.
Post lub sij hawm: Lub Xya hli ntuj-20-2023