Long-term agrichemical use leads to alterations in bacterial community diversity
2012
Tan, H., National Univ. of Ireland, Cork (Ireland). BIOMERIT Research Centre | Barret, M., National Univ. of Ireland, Cork (Ireland). BIOMERIT Research Centre | Rice, O., National Univ. of Ireland, Cork (Ireland). BIOMERIT Research Centre | Dowling, D.N., Institute of Technology Carlow (Ireland). Dept. of Science and Health | Burke, J., Teagasc Research Centre, Oakpark (Ireland) | Morrissey, J.P., National Univ. of Ireland, Cork (Ireland). Microbiology Dept. | O'Gara, F., National Univ. of Ireland, Cork (Ireland). BIOMERIT Research Centre
This study investigated the bacterial communities in a spring barley monoculture site subjected to two different input regimes for over 12 years: a conventional chemical/fertiliser regime, and a reduced input regime. A culture independent approach was performed to compare the bacterial communities through 16S rRNA gene PCR-DGGE. PCO analysis revealed that the rhizosphere has a strong structuring effect on the bacterial community. Moreover, high inputs of agrichemicals lead to an increase of phosphorus level in the soil and a concomitant reduction of the bacterial diversity. These results may help to evaluate the environmental risks associated with agrichemical usage.
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