Humic acid (HA) yog ib yam khoom ruaj khov ntawm cov organic teeb meem decomposition thiab yog li accumulates nyob rau hauv ib puag ncig systems.Humic acid yuav pab tau cov nroj tsuag loj hlob los ntawm chelates cov as-ham uas tsis muaj thiab buffering pH.Peb tshuaj xyuas cov txiaj ntsig ntawm HA ntawm kev loj hlob thiab micronutrient uptake hauv cov nplej (Triticum aestivum L.) zus hydroponically.Plaub qhov kev kho mob hauv paus tau muab piv rau: (i) 25 micromoles hluavtaws chelate N-(4-hydroxyethyl)ethylenediaminetriacetic acid (C10H18N2O7) (HEDTA ntawm 0.25 mM C);(ii) 25 micromoles hluavtaws chelate nrog 4-morpholineethanesulfonic acid (C6H13N4S) (MES ntawm 5 mM C) pH tsis;(iii) HA ntawm 1 mM C yam tsis muaj hluavtaws chelate lossis tsis;thiab (iv) tsis muaj hluavtaws chelate lossis tsis.Ample inorganic Fe (35 micromoles Fe3+) tau muab rau hauv txhua qhov kev kho mob.Tsis muaj qhov sib txawv tseem ceeb hauv tag nrho cov biomass lossis cov noob tawm los ntawm cov kev kho mob, tab sis HA tau zoo ntawm ameliorating nplooj nplooj interveinal chlorosis uas tshwm sim thaum ntxov loj hlob ntawm nonchelated trea tment.Nplooj-tissue Cu thiab Zn concentrations tau qis dua hauv HEDTA kev kho mob txheeb ze tsis muaj chelate (NC), qhia tias HEDTA tau ua kom cov as-ham complexed, yog li txo lawv cov ion dawb thiab li no, bioavailability.Humic acid tsis complex Zn li muaj zog thiab tshuaj lom neeg sib npaug qauv txhawb cov txiaj ntsig no.Kev ntsuam xyuas titration tau qhia tias HA tsis yog qhov zoo ntawm pH tsis nyob ntawm 1 mM C, thiab qib siab dua ua rau HA-Ca thiab HA-Mg flocculation hauv cov khoom noj khoom haus.
