LEAD MOBILITY IN THE SOIL OF DIFFERENT AGROECOSYSTEMS
Journal Title: International journal of ecosystems and ecology science (IJEES) - Year 2019, Vol 9, Issue 4
Abstract
Lead (Pb) is a widespread pollutant presented in soil, by various compounds. However, only mobile forms represent a danger to living organisms. The mobile compounds are those extracted with 0.1 and 1.0 HCl. Soil indexes like - the content of particles less than 0.001 mm (clay), soil organic matter (SOM) content, pH status of the soil solution significantly affect the mobility of lead. Application of mineral and organic fertilizers can enhance or reduce the mobility of lead in soil as well. The influence of fertilizers on the mobility of lead, as well as the peculiarities of its translocation into plants, was investigated at long-term-field experiments in three main climatic zones of Ukraine (Polissya, Forest-steppe, Steppe). We found that the soil parameters had the influence on lead mobility were in the following sequence: clay content> SOM > soil рН. There was a strong inverse correlation between lead mobility and soil parameters (r = 0.821-0.962). Application of mineral fertilizers increased the content of lead mobile forms in soil (by 7-24%), whereas organic fertilizers contributed to its decrease. Crops were ranged by the ability for lead accumulation in the following order: clover> sugar beets > corn> sunflower> winter wheat. Furthermore, mineral fertilizers contributed significantly to lead translocation from the soil to crops, while the influence of organic fertilizers on this process was insignificant.
Authors and Affiliations
Valeria Bondar, Natalia Makarenko, Lyudmyla Symochko
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