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| Publication Type:
| Refereed |
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| Author(s): | Dušek, Ladislav |
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| Author Affiliation: | Department of Environmental Studies, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic. |
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| Title: | The effect of cadmium on the activity of nitrifying populations in two different grassland soils |
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| Source: | Plant and Soil. Vol. 177, No. 1, November 1995, p. 43-53. |
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| Publishing Information: | Dordrecht, Netherlands: Kluwer Academic Publishers |
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| # of Pages: | 11 |
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| Related Web URL: | http://link.springer.com/article/10.1007/BF00010336
Last checked: 10/14/2015
Notes: Abstract only |
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| Keywords: | TIC Keywords: Cadmium; Nitrification; Grassland soils; Soil contamination
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| Abstract/Contents: | "The effect of a laboratory addition of 10, 100, and 500 mg Cd kg⁻¹(dry soil) on ammonification and nitrification was studied using soil samples of two unpolluted grassland soils. Calcerous and non-calcerous soil were selected for this purpose. Various parameters of nitrifying activity were investigated simultaneously: activity during long-term laboratory incubations in the presence and absence of a substrate, mineralization potentials, and potential activity of both ammonium and nitrite oxidizers during short-term incubations in soil slurries. Cadmium was added as aqueous CdCl₂. Additions of both 100 and 500 mg Cd kg⁻¹(dry soil) doses significantly lowered the ability of both soils to nitrify 100 μg added NH⁻₄-Ng⁻¹(dry soil) as a substrate, which was reflected in a decreased rate of nitrate formation (maximum inhibition reached 60% in the calcareous soil and 45% in the non-calcareous soil). Furthermore, these two concentrations of Cd caused an abnormal accumulation of nitrite immediately after incorporation, particularly in the calcareous soil. The addition of 10 mg Cd kg⁻¹ (dry soil) intensified N-mineralization in both soils, probably as a consequence of a higher concentration of readily metabolized substrate originating from killed bacteria or fungi. An excess of nitrate was then formed as a final step. The harmful effect of cadmium was more pronounced in calcerous soil, probably due to the higher sensitivity of nitrite-oxidizers in these soil samples." |
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| Language: | English |
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| References: | 46 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Dušek, L. 1995. The effect of cadmium on the activity of nitrifying populations in two different grassland soils. Plant Soil. 177(1):p. 43-53. |
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