Humic acid (HA) ke sehlahisoa se batlang se tsitsitse sa ho bola ha lintho tse phelang, kahoo e bokellana tsamaisong ea tikoloho.Humic acid e ka thusa kholo ea semela ka ho chelate limatlafatsi tse sa fumaneheng le ho thibela pH.Re ile ra hlahloba phello ea HA kholong le ho kenngoa ha micronutrient ka koro (Triticum aestivum L.) e hōlileng ka hydroponically.Liphekolo tse 'nè tsa libaka tsa metso li ile tsa bapisoa: (i) 25 micromoles synthetic chelate N- (4-hydroxyethyl) ethylenediaminetriacetic acid (C10H18N2O7) (HEDTA ho 0.25 mM C);(ii) 25 micromoles synthetic chelate e nang le 4-morpholineethanesulfonic acid (C6H13N4S) (MES ho 5 mM C) pH buffer;(iii) HA ho 1 mM C ntle le chelate ea maiketsetso kapa buffer;le (iv) ha ho na chelate ea maiketsetso kapa buffer.Ample inorganic Fe (35 micromoles Fe3+) e ile ea fanoa liphekolong tsohle.Ho ne ho se na phapang e kholo ea lipalo-palo ho kakaretso ea biomass kapa chai ea peo har'a liphekolo, empa HA e ne e sebetsa hantle ho ntlafatseng lekhasi la interveinal chlorosis e etsahetseng nakong ea kholo ea pele ea "nonchelated trea tment".Leaf-tissue Cu le Zn concentrations e ne e le tlase ho phekolo ea HEDTA e amanang le ho se chelate (NC), e bontšang HEDTA e thatafalitse limatlafatsi tsena ka matla, kahoo e fokotsa mesebetsi ea bona ea mahala ea ion 'me kahoo, bioavailability.Humic acid ha ea ka ea rarahana Zn ka matla le ho leka-lekanya lik'hemik'hale ho tšehetsa liphetho tsena.Liteko tsa titration li bonts'itse hore HA e ne e se ts'ebetso e sebetsang ea pH ho 1 mM C, mme maemo a holimo a ile a fella ka ho phalla ha HA-Ca le HA-Mg tharollong ea limatlafatsi.
