Effect of amendment C:N ratio on plant richness, cover and metal content for acidic Pb and Zn mine tailings in Leadville, Colorado
| Autor: | Sally Brown, Chuck Henry, Harry Compton, Pam S. DeVolder |
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| Rok vydání: | 2006 |
| Předmět: |
Colorado
Nitrogen Health Toxicology and Mutagenesis Amendment Industrial Waste Plant Development Toxicology Mining Animal science Mining engineering Metals Heavy Animals Humans Soil Pollutants Revegetation Ecosystem Soil Microbiology Chemistry Species diversity Plant community General Medicine Pollution Tailings Carbon Zinc Biodegradation Environmental Lead Plant cover Phytotoxicity Species richness Environmental Monitoring |
| Zdroj: | Environmental pollution (Barking, Essex : 1987). 149(2) |
| ISSN: | 0269-7491 |
| Popis: | Biosolids and woody debris were applied with target C:N ratios of 8:1 to 50:1 to phytotoxic, acidic, high metal mine tailings to test the effect of amendment C:N ratio on native plant restoration. Total soil C decreased over time indicating an active microbial community. The 8:1 treatment initially had no growth, the highest plant cover for the final sampling (86.8+/-13.8%) and the lowest number of species (3.33+/-0.4). The greatest number of species was in the 30:1 treatment (5.44+/-0.45). Plant cover increased over time for all treatments from 44.7% in 2001 to 71% in 2005. This response was consistent across all except for the 30:1 treatment, which showed a slight decrease in the final year (65+/-11%). Volunteer species and evidence of animal grazing were observed in all amended plots. Results indicate that a C:N ratio>/=20:1 increased species diversity. |
| Databáze: | OpenAIRE |
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