Long-term agrichemical use leads to alterations in bacterial community diversity
MetadataShow full item record
Bacterial communities are key drivers of soil fertility and agriculture productivity. Understanding how soil bacterial communities change in response to different conditions is an important aspect in the development of sustainable agriculture. There is a desire to reduce the current reliance on high inputs of chemicals and fertilisers in agriculture, but limited data are available on how this might impact soil bacterial communities. 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 per - formed 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.
Showing items related by title, author, creator and subject.
Fertilization management affects the alkaline phosphatase bacterial community in barley rhizosphere soilChhabra, Sagar; Brazil, Dina; Morrissey, John; Burke, Jim; O'Gara, Fergal; Dowling, David (2013)There is increasing interest in good agriculture practices that address the issues of sustainability, reduction in inputs such as fertilizers and pesticides while maintaining crop yield and soil fertility. It is important ...
Long-term phosphorus fertilisation increased the diversity of the total bacterial community and the phoD phosphorus mineraliser group in pasture soilsTan, Hao; Barret, Matthieu; Mooij, Marlies; Rice, Olivia; Morrissey, John; Dobson, Alan; Griffiths, Bryan; O'Gara, Fergal (2013)Fertilisers, especially nitrogen (N) and phosphorus (P) supplies, are frequently used in agricultural soil management to attain high crop yields. However, the intensive application of these chemical inputs can decrease ...
Molecular and geochemical constraints on anaerobic ammonium oxidation (anammox) in a riparian zone of the Seine Estuary (France)Naeher, Sebastian; Huguet, A.; Roose-Amsaleg, C.; Laverman, A.; Fosse, C.; Lehmann, M.; Derenne, S.; Zopfi, J. (2015)To expand the limited knowledge about the ecological significance of anaerobic ammonium oxidation (anammox) in continental aquatic and terrestrial ecosystems, we studied community structure, abundance, and activity of ...