Changes in Mineralization Activity of Microbial Communities Depending on Physico-Chemical Properties of Soils and Cadmium Contamination

A.R. Gilmullina a*, P.Y. Galitskaya a**, A.A. Saveliev a***, Y.V. Kuzyakov a, b****, S.Y. Selivanovskaya a*****

a Kazan Federal University, Kazan, 420008 Russia

b University of Göttingen, Göttingen, 37073 Germany

E-mail: *gilmullinaar@mail.ru, **gpolina33@yandex.ru, ***Anatoly.Saveliev.aka.saa@gmail.com, ****kuzyakov@gwdg.de, *****svetlana.selivanovskaya@kpfu.ru

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Abstract

The effects of glucose and cadmium addition, as well as their combination on the CO2 efflux from soils, which differed by the total organic carbon content and texture, were studied. Glucose (10 g/kg) addition induced an increase in the CO2 efflux from soil and a decrease in the content of dissolved organic carbon. The intensity of this effect reduced in samples with the low total organic carbon content. Cadmium (300 mg/kg) addition alone did not affect the studied parameters. In case of combined addition of glucose and cadmium, the mineralization activity of microbial community was mainly determined by glucose amendment.

Keywords: soil respiration, cadmium, glucose, carbon mineralization, ecology of soil microorganisms

Acknowledgments. This study was supported by the Russian Foundation for Basic Research (project no. 15-04-04520).

Figure Captions

Fig. 1. Changes in the content of dissolved organic carbon (DOC) during the incubation of the soil sampled at different horizons (0–20, 20–40, and 40–60 cm) upon the treatment with cadmium and glucose.

Fig. 2. Changes in the respiration activity of microbial communities of the soil sampled at different horizons (0–20, 20–40, and 40–60 cm) upon the treatment with cadmium and glucose. Solid line is the mean value of the parameter, dotted line is the standard error.

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For citation: Gilmullina A.R., Galitskaya P.Y., Saveliev A.A., Kuzyakov Y.V., Seliva­novskaya S.Y. Changes in mineralization activity of microbial communities depending on physico-chemical properties of soils and cadmium contamination. Uchenye Zapiski Kazanskogo Universiteta. Seriya Estestvennye Nauki, 2016, vol. 158, no. 3, pp. 440–454. (In Russian)


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