Analysis and Evaluation of Heavy Metal Contents in Tobacco Fertilizers of Jiangxi Province

In order to access the quality and safety of tobacco fertilizers commonly used in Jiangxi Province, calcium magnesium phosphate, magnesium fertilizer, potash fertilizer, boric fertilizer, organic fertilizer, organic-inorganic compound fertilizer and special tobacco fertilizer were collected and the contents of As, Cd, Cr, Cu, Hg, Ni, Pb and Zn in these fertilizers were determined by ICP-MS. The Nemerow index method was used to evaluated their quality. The results showed that the contents of heavy metals in tobacco fertilizers of Jiangxi Province were at a safe level, although the variation was large. Heavy metal contents in calcium magnesium phosphate, organic fertilizer and organic-inorganic compound fertilizer were relatively high in general, but Cr content in calcium magnesium phosphate and As content in organic-inorganic compound fertilizer exceeded the limits. The contents of heavy metals in magnesiumfertilizer, potashfertilizer, boric fertilizer, organic fertilizer were low. Analysis of variance revealed that there was significant difference among Cr and Ni concentrations in calcium magnesium phosphate, Cd and Hg concentrations in organic fertilizer, Zn concentrations in organic-inorganic compound fertilizer with other fertilizers.