Experimental studies on soil enzymes changes under the critical heavy metals accumulation in Luvisols and Albeluvisols
2005
Motuzas, A., Lithuanian Univ. of Agriculture, Akademija, Kauno reg. (Lithuania) | Vaisvalavicius, R., Lithuanian Univ. of Agriculture, Akademija, Kauno reg. (Lithuania) | Zakarauskaite, D., Lithuanian Univ. of Agriculture, Akademija, Kauno reg. (Lithuania) | Grigaliuniene, K., Lithuanian Univ. of Agriculture, Akademija, Kauno reg. (Lithuania) | Butkus, V., Lithuanian Univ. of Agriculture, Akademija, Kauno reg. (Lithuania)
Studies on soil biological activity is one of the most representative indicators of soil pollution because of its sensitivity to chemical status change in the soil environment. The aim of the present investigation - to determine enzymes activity change in Lithuanian Luvisols and Albeluvisols under the influence of heavy metals sorption via simulated soil pollution conditions. Therefore investigations were carried out using such a model system: soil - physical chemical parameters of heavy metals migration and accumulation in the soil - impact of heavy metals on soil enzymes activity. The results obtained demonstrated a great potential of the 'modelling' Luvisol and Albeluvisol to accumulate different fractions of heavy metals. At the maximum soil saturation with heavy metals up to sorption capacity the influence on the activity of soil enzymes and intensity of soil respiration was evident. However, it was found to be different. Results showed a very significant activity decrease of dehydrogenases (95-98%), urease (65-97%), saccharase (57-77%) and soil respiration intensity (38-65%) compare to unpolluted soils.
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