Humic acid (HA) chigadzirwa chakagadzikana chekuora kwe organic uye nekudaro inoungana mumasisitimu ezvakatipoteredza.Humic acid inogona kubatsira kukura kwechirimwa kuburikidza nekucheka kudya kusingawanikwe uye kuvhara pH.Takaongorora mhedzisiro yeHA pakukura uye micronutrient kutora mugorosi (Triticum aestivum L.) yakakura hydroponically.Mishonga ina yemidzi-zone yakaenzaniswa: (i) 25 micromoles synthetic chelate N- (4-hydroxyethyl) ethylenediaminetriacetic acid (C10H18N2O7) (HEDTA pa 0.25 mM C);(ii) 25 micromoles synthetic chelate ne 4-morpholineethanesulfonic acid (C6H13N4S) (MES pa 5 mM C) pH buffer;(iii) HA pa1 mM C pasina chelate yekugadzira kana buffer;uye (iv) hapana synthetic chelate kana buffer.Ample inorganic Fe (35 micromoles Fe3+) yakapihwa mukurapa kwese.Pakanga pasina mutsauko wakakosha mune yakazara biomass kana goho rembeu pakati pekurapa, asi HA yaive inoshanda pakunatsiridza shizha interveinal chlorosis yakaitika pakukura kwekutanga kweiyo nonchelated trea tment.Leaf-tissue Cu uye Zn concentrations dzakaderera muHEDTA kurapa maererano ne-no chelate (NC), zvichiratidza kuti HEDTA yakaomesa zvakasimba izvi zvinovaka muviri, nokudaro kuderedza mabasa avo eion mahara uye naizvozvo, bioavailability.Humic acid haina kuomesa Zn seyakasimba uye makemikari equilibrium modeling yakatsigira izvi mhedzisiro.Miedzo yeTitration yakaratidza kuti HA yanga isiri pH buffer inoshanda pa 1 mM C, uye mazinga epamusoro akakonzera HA-Ca uye HA-Mg kuyerera mune zvinovaka muviri mhinduro.
