I-Humic acid (HA) iwumkhiqizo ozinzile ngokuqhathaniswa wokubola kwezinto eziphilayo futhi ngaleyo ndlela inqwabelana ezinhlelweni zemvelo.I-Humic acid ingase izuzise ukukhula kwezitshalo ngokuchela imisoco engatholakali kanye ne-buffering pH.Sihlole umphumela we-HA ekukhuleni nasekuthatheni i-micronutrient ukolweni (i-Triticum aestivum L.) etshalwe nge-hydroponically.Ukwelashwa kwezimpande ezine kwaqhathaniswa: (i) i-25 micromoles synthetic chelate N-(4-hydroxyethyl) ethylenediaminetriacetic acid (C10H18N2O7) (HEDTA ku-0.25 mM C);(ii) 25 micromoles synthetic chelate ne 4-morpholineethanesulfonic acid (C6H13N4S) (MES at 5 mM C) pH buffer;(iii) I-HA ku-1 mM C ngaphandle kwe-synthetic chelate noma i-buffer;futhi (iv) alikho i-synthetic chelate noma i-buffer.I-Fe eningi ye-inorganic Fe (35 micromoles Fe3+) yanikezwa kukho konke ukwelashwa.Awukho umehluko obalulekile ngokwezibalo ku-biomass isiyonke noma isivuno sembewu phakathi kokwelashwa, kodwa i-HA ibisebenza ngempumelelo ekwehliseni izinga le-chlorosis ye-interveinal yamaqabunga eyenzeka ngesikhathi sokukhula kokuqala komuthi ongahlanganisiwe.I-Leaf-tissue Cu kanye ne-Zn ukugxila bekuphansi ekwelapheni kwe-HEDTA ngokuhlobene ne-no chelate (NC), okubonisa ukuthi i-HEDTA ihlanganise ngokuqinile lezi zakhi, ngaleyo ndlela yehlisa imisebenzi yazo ye-ion yamahhala futhi ngenxa yalokho, i-bioavailability.I-Humic acid ayizange ibe yinkimbinkimbi i-Zn njengoba imodeli yokulinganisa kwamakhemikhali isekela le miphumela.Ukuhlolwa kwe-Titration kubonise ukuthi i-HA yayingesona isilondolozi se-pH esisebenzayo ku-1 mM C, futhi amazinga aphezulu abangele ukugeleza kwe-HA-Ca ne-HA-Mg esixazululweni sezakhi.
