Journal of Pure and Applied MicrobiologyVol. 2 No. 2

Effect of Cadmium on the Activity of Certain Soil Enzymes

Manju Chundawat┬╣ and N.C. Aery┬▓

Laboratory of Geobotany & Biogeochemistry, Department of Botany, University College of Science, Mohanlal Sukhadia University, Udaipur - 313 001, India.

Received on 12 May 2008 and accepted on 17 June 2008

 

ABSTRACT

The effect of different concentrations of Cd (100, 200, 400, 800 and 1600 ppm) on the activity of soil enzymes as like dehydrogenase, invertase and soil alkaline phosphatase were studied after 15 days and 30 days of incubation period. The maximum activity of soil dehydrogenase and invertase enzymes was observed at 100 ppm level of Cd after 15 days of incubation period. Beyond this level a gradual reduction in enzymatic activity was observed. Alkaline phosphatase activity decreased at all applied doses of Cd. A marked reduction in the activities of all these enzymes, over the control, was observed after 30 days of incubation period. A negative correlation was observed between soil pH and soil applied doses of Cd. The above parameters can be used as indicators for cadmium toxicity in soils.

Keywords : Cadmium, Dehydrogenase, Invertase, Alkaline phosphatase, pH.