Publication Date
1997
Description
Degradation of mining sites resulting from deep and irreversible human action is a serious environmental problem. So, to rehabilitate mining sites, we studied the ability of diazotrophic bacteria to improve plant growth. Firstly, we isolated diazotrophic bacteria on Cyperaceae and Poaceae rhizosphere. After characterisation and partial identification of found bacteria, we decided to study the effect of presence and the activity of bacteria on plant growth. To compare with reference bacteria (Azospirillum brasilense), we had to test the effect of endemic bacteria on soil without limiting factors (Maré’s soil). We think that if bacteria are able to help plants to grow on well-balanced soil, the association plant-bacteria could give best results on mining soils (without organic matter, nitrogen and with nickel). But, field tests should be realized in the future to confirm this hypothesis. In this experiment, it has been possible to show the significant effect of two bacteria on stage, length and dry matter production of Chloris gayana (Rhodes callide). So, with endemic diazotrophic bacteria-plant association we could:
- create a mulch to help Cyperaceae growth;
- restore microflora;
- or introduce Poaceae species if these two precedent solutions are not adapted to mining sites.
Citation
Mercky, S; Pineau, R; Navarro, E; and Sarrailh, J M., "Rehabilitation of Mining Sites Using Diazotrophic Bacteria and Gramineous Associations" (2024). IGC Proceedings (1997-2023). 17.
https://uknowledge.uky.edu/igc/1997/session16/17
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Rehabilitation of Mining Sites Using Diazotrophic Bacteria and Gramineous Associations
Degradation of mining sites resulting from deep and irreversible human action is a serious environmental problem. So, to rehabilitate mining sites, we studied the ability of diazotrophic bacteria to improve plant growth. Firstly, we isolated diazotrophic bacteria on Cyperaceae and Poaceae rhizosphere. After characterisation and partial identification of found bacteria, we decided to study the effect of presence and the activity of bacteria on plant growth. To compare with reference bacteria (Azospirillum brasilense), we had to test the effect of endemic bacteria on soil without limiting factors (Maré’s soil). We think that if bacteria are able to help plants to grow on well-balanced soil, the association plant-bacteria could give best results on mining soils (without organic matter, nitrogen and with nickel). But, field tests should be realized in the future to confirm this hypothesis. In this experiment, it has been possible to show the significant effect of two bacteria on stage, length and dry matter production of Chloris gayana (Rhodes callide). So, with endemic diazotrophic bacteria-plant association we could:
- create a mulch to help Cyperaceae growth;
- restore microflora;
- or introduce Poaceae species if these two precedent solutions are not adapted to mining sites.
