Kusiyana Pakati pa DAP ndi NPK Feteleza

Kusiyana kwakukulu pakati pa feteleza wa DAP ndi NPK ndikuti fetereza wa DAP alibepotaziyamupomwe feteleza wa NPK alinso ndi potaziyamu.

Kodi DAP Feteleza ndi chiyani?

Feteleza wa DAP ndi magwero a nayitrogeni ndi phosphorous omwe amagwiritsidwa ntchito kwambiri pazaulimi.Chinthu chachikulu mu fetelezayu ndi diammonium phosphate yomwe ili ndi mankhwala opangidwa ndi mankhwala (NH4)2HPO4.Komanso, dzina la IUPAC la chigawochi ndi diammonium hydrogen phosphate.Ndipo ndi madzi sungunuka ammonium phosphate.

Popanga fetelezayu, timachita phosphoric acid ndi ammonia, yomwe imapanga slurry yotentha yomwe pambuyo pake imazirala, granulated ndi sieved kuti tipeze feteleza omwe tingagwiritse ntchito pafamu.Komanso, tiyenera kupitiriza ndi zimene anachita pansi olamulirika chifukwa zochita amagwiritsa sulfuric asidi, amene ndi owopsa kusamalira.Chifukwa chake, gawo lazakudya la fetelezayu ndi 18-46-0.Izi zikutanthauza kuti ili ndi nayitrogeni ndi phosphorous mu chiŵerengero cha 18:46, koma ilibe potaziyamu.

Kawirikawiri, timafunika pafupifupi matani 1.5 mpaka 2 a thanthwe la phosphate, matani 0.4 a sulfure (S) kuti asungunuke thanthwe, ndi matani 0.2 ammonia kuti apange DAP.Komanso, pH ya chinthu ichi ndi 7.5 mpaka 8.0.Choncho, ngati tiwonjezera fetelezayu m'nthaka, amatha kupanga pH yamchere mozungulira ma granules a feteleza omwe amasungunuka m'madzi a nthaka;motero wogwiritsa ntchito apewe kuwonjezera feteleza wochuluka.

Feteleza wa NPK ndi chiyani?

Feteleza wa NPK ndi zigawo zitatu za feteleza zomwe zimathandiza kwambiri pazaulimi.Feteleza uyu amagwira ntchito ngati gwero la nayitrogeni, phosphorous ndi potaziyamu.Choncho, ndi gwero lofunika la zakudya zonse zitatu zomwe chomera chimafuna kuti chikule, kukula ndi kugwira ntchito moyenera.Dzina la chinthu ichi limasonyezanso michere yomwe ingapereke.

Mlingo wa NPK ndi kuphatikiza manambala omwe amapereka chiyerekezo cha nayitrogeni, phosphorous ndi potaziyamu zomwe zimaperekedwa ndi fetelezayu.Ndi kuphatikiza kwa manambala atatu, olekanitsidwa ndi mizere iwiri.Mwachitsanzo, 10-10-10 imasonyeza kuti fetereza amapereka 10% ya mchere uliwonse.Kumeneko, nambala yoyamba imatanthawuza kuchuluka kwa nayitrogeni (N%), nambala yachiwiri ndi ya phosphorous peresenti (mumitundu ya P2O5%), ndipo yachitatu ndi ya potaziyamu peresenti (K2O%).