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Biological characterization of a southeast Kansas mining site |
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| Authors: | K G Shetty M K Banks B A Hetrick A P Schwab |
| Institution: | 1. Department of Plant Pathology, Kansas State University, 66506, Manhattan, KS, USA 2. Department of Civil Engineering, Kansas State University, 66506, Manhattan, KS, USA 3. Department of Agronomy, Kansas State University, 66506, Manhattan, KS, USA |
| Abstract: | Soils from a heavy metal contaminated southeast Kansas mining site were characterized for microbial resistance to zinc, cadmium, and lead. Plant availability indices (DTPA-extractable) for zinc were very high in the waste material (610 Μg g?1), while levels of lead and cadmium were more moderate, 45 and 4.3 Μg g ?1, respectively. Soil contamination decreased with distance from the mine tailings or ‘chat’. In the rhizosphere, bacterial resistance to zinc and cadmium increased as the DTPA-extractable plant availability indices increased. Mycorrhizal root colonization was not affected by the heavy metal concentration in the soil. The established vegetation in the contaminated area included warm- and cool-season grasses as well as forbs and sedges. |
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