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2 Electronic Journal of Polish Agricultural Universities. Series Environmental Development

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Changes of dehydrogenase inhibition in soil induced by various concentrations of selected heavy metal salts

100%

Nowak J. , Snieg B.

nr 2

The influence of various concentrations of salts of lead (II), copper (II), manganese (II), cobalt (II), molybdenum (IV) and iron (III) upon the soil dehydrogenase has been studied. Ecological areas featuring the contamination degree to which the studied soil environment had been exposed have been determined. Particular attention has been paid to high heavy metal doses causing significant disturbance to soil metabolism.

Phosphatase activity and ATP content in soil and plant related to copper [II] nitrate [V] concentration in soil

80%

Nowak J. , Snieg B. , Szymczak J.

nr 2

The paper presents the results of a pot experiment on phosphatase activity and ATP level in plant and in soil induced by diversified doses of copper (II) nitrate (V). Five combinations of copper (II) salt were applied; each combination was conducted in 4 identical series. Water solutions of copper (II) nitrate (V) were introduced into 5 soil samples in the following doses: no salt introduced (control), 0.05 mmol. kg-1, 0.50 mmol·kg-1, 5.00 mmol·kg-1, 50.00 mmol.kg-1 of soil for the samples from 1 to 5, respectively. Size grading of the soil experimented was typical for light silty clay. Sown Pea /Pisum sativum L./ of Amethyst variety served as a test plant. Enzymes activities and ATP contents in both soil and plant samples were analysed in various developmental stages of Sown Pea, namely at the two-leaves, blooming and green legume stages.