Long‐term fertilization and tillage regimes have limited effects on structuring bacterial and denitrifier communities in a sandy loam UK soil

Autor: Claire E. Moulton‐Brown, Tianer Feng, Shreiya Shivagni Kumar, Luxi Xu, Calvin Dytham, Thorunn Helgason, Julia M. Cooper, James W. B. Moir
Rok vydání: 2021
Předmět:
Zdroj: Moulton Brown, C E, Feng, T, Kumar, S S, Xu, L, Dytham, C, Helgason, T, Cooper, J & Moir, J W B 2022, ' Long-term fertilization and tillage regimes have limited effects on structuring bacterial and denitrifier communities in a sandy loam UK soil ', Environmental Microbiology, vol. 24, no. 1, pp. 298-308 . https://doi.org/10.1111/1462-2920.15873
ISSN: 1462-2920
1462-2912
DOI: 10.1111/1462-2920.15873
Popis: Denitrification causes loss of available nitrogen from soil systems, thereby reducing crop productivity and increasing reliance on agrochemicals. The dynamics of denitrification and denitrifying communities are thought to be altered by land management practices, which affect the physicochemical properties of the soil. In this study, we look at the effects of long-term tillage and fertilization regimes on arable soils following 16 years of treatment in a factorial field trial. By studying the bacterial community composition based on 16S rRNA amplicons, absolute bacterial abundance and diversity of denitrification functional genes (nirK, nirS and nosZ), under conditions of minimum/conventional tillage and organic/synthetic mineral fertilizer, we tested how specific land management histories affect the diversity and distribution of both bacteria and denitrification genes. Bacterial and denitrifier communities were largely unaffected by land management history and clustered predominantly by spatial location, indicating that the variability in bacterial community composition in these arable soils is governed by innate environmental differences and Euclidean distance rather than agricultural management intervention.
Databáze: OpenAIRE
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