20.500.12556/DKUM-62616 VSEBNOST NEKATERIH ESENCIALNIH MIKROHRANIL IN TEŽKIH KOVIN V RASTNIH SUBSTRATIH The content of some essential micronutrients and heavy metals in potting substrates Rastni substrat predstavlja medij, v katerem se vzgajajo različne rastline. Namen raziskave je bil določiti vsebnosti nekaterih esencialnih mikrohranil in neesencialnih kovin v rastnih substratih. Za kislinski razklop vzorcev v mikrovalovni pečici smo uporabili mešanico HNO3, HCl in HF. Koncentracije Fe, Zn in Mn smo izmerili s plamensko atomsko absorpcijsko spektrometrijo (FAAS) in koncentracije Cu, Cr, Cd ter Pb z elektrotermično atomsko absorpcijsko spektrometrijo (ETAAS). Vsebnosti Fe, Zn, Mn, Cu, Cr, Cd in Pb so bile 0,10-2,51 % na suho snov (SS), 14,1- 213 mg/kg SS, 11,5-715 mg/kg SS, 3,99-61,4 mg/kg SS, 2,87-341 mg/kg SS, 0,100-1,142 mg/kg SS in 4,73-46,2 mg/kg SS. Vse substrate, razen substrata za zasaditev balkonskega cvetja lahko glede na izmerjene vrednosti Cd, Cr, Cu, Pb in Zn uvrstimo v prvi kakovostni razred. Potting substrate is a medium used for growing different plants. The aim of the presented research was to determine the content of certain essential micronutrients and non-essential metals in the potting substrates. Microwave assisted acid digestion of samples was performed using a mixture of HNO3, HCl and HF. The concentrations of Fe, Zn and Mn were measured via flame atomic absorption spectrometry (FAAS) and the concentrations of Cu, Cr, Cd and Pb were determined via graphite furnace an atomic absorption spectrometry (ETAAS). The contents of Fe, Zn, Mn, Cu, Cr, Cd and Pb ranged between 0,10-2,51 % on a dry weight basis (DW), 14,1-213 mg/kg DW, 11,5-715 mg/kg DW, 3,99-61,4 mg/kg DW, 2,87-341 mg/kg DW, 0,100-1,142 mg/kg DW, and 4,73-46,2 mg/kg DW, respectively. All analysed potting substrates, except the substrate for planting balcony flowers, can be classified as first class, depending on the measured Cd, Cr, Cu, Pb and Zn values. rastni substrati mikrohranila težke kovine potting substrates micronutrients heavy metals true true false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2016-08-30 08:12:00 2016-10-11 12:05:39 2022-06-29 03:09:22 2019-07-11 13:01:40 2016 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 URN:SI:UM:DK:WFLTFONN UN_Rojec_Petra_2016.pdf UN_Rojec_Petra_2016.pdf 1 E827D0F06F0B72FC000464EE6FEF6BE9 2d925b490241148b8a6de4b62a5494c8c517e88ab6b03b2d11e7e9226159ae60 87ae19b1-7c0d-11eb-bb7a-00155d0001ca https://dk.um.si/Dokument.php?lang=slv&id=105177 Fakulteta za kmetijstvo in biosistemske vede 0 0 0