Effects of Mineral and Organic Fertilization on the Accumulation of Heavy Metals in Spinach Plants | Ефекти на минералното и органичното торене върху акумулацията на замърсители в растения от спанак
2012
Dinev, N.., N. Pushkarov Institute of Soil Science, Sofia (Bulgaria) | Mitova, I., N. Pushkarov Institute of Soil Science, Sofia (Bulgaria)
The problem with food safety of plant production is an actual problem especially at heavy metal polluted soils. The goal of investigation was to study transfer and accumulation of heavy metals – Cd, Zn, and Pb, in spinach plants in respect to application of organic and mineral fertilizers. A green house experiment with soil around a non-ferrous plant with different levels of contamination was carried out. For growing of spinach plants mineral and organic Amalgerol treatments were applied. Maximal positive effect on the growing parameters were determined at mineral treatment N200P200K200, combined with low concentration of Amalgerol – 0.05%. The photosynthetic activity by plastid pigment content was discussed. The quality parameters – nitrate content, Vit. C and total sugar, showed that optimal variants are N200P200K200 and N200P200K200 + Amalgerol as leaf application. The plants grown at mineral fertilizers expressed higher concentration of nitrate Vit C and sugar than these ones growing at organic fertilizers. The risk assessment of production showed that spinach accumulated the highest concentrations of Cd – 49 mg/kg, Pb – 83 mg/kg and Zn – 663 mg/kg in treatments of soil with Amalgerol – 500 ml/da and Amalgerol 1000 ml/da, and could be characterized as toxic.
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