Hodgson, C, Oliver, D.M., Fish, R, Bulmer, N., Heathwaite, A.L., Winter, D.M., Chadwick, David R. (2016) Seasonal persistence of faecal indicator organisms in soil following dairy slurry application to land by surface broadcasting and shallow injection. Journal of Environmental Management, 183 (Pt 1). pp. 325-332. ISSN 0301-4797. (doi:10.1016/j.jenvman.2016.08.047) (KAR id:59893)
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Official URL: http://dx.doi.org/10.1016/j.jenvman.2016.08.047 |
Abstract
Dairy farming generates large volumes of liquid manure (slurry), which is ultimately recycled to agricultural
land as a valuable source of plant nutrients. Different methods of slurry application to land exist;
some spread the slurry to the sward surface whereas others deliver the slurry under the sward and into
the soil, thus helping to reduce greenhouse gas (GHG) emissions from agriculture. The aim of this study
was to investigate the impact of two slurry application methods (surface broadcast versus shallow injection)
on the survival of faecal indicator organisms (FIOs) delivered via dairy slurry to replicated
grassland plots across contrasting seasons. A significant increase in FIO persistence (measured by the
half-life of E. coli and intestinal enterococci) was observed when slurry was applied to grassland via
shallow injection, and FIO decay rates were significantly higher for FIOs applied to grassland in spring
relative to summer and autumn. Significant differences in the behaviour of E. coli and intestinal
enterococci over time were also observed, with E. coli half-lives influenced more strongly by season of
application relative to the intestinal enterococci population. While shallow injection of slurry can reduce
agricultural GHG emissions to air it can also prolong the persistence of FIOs in soil, potentially increasing
the risk of their subsequent transfer to water. Awareness of (and evidence for) the potential for ‘pollution-swapping’
is critical in order to guard against unintended environmental impacts of agricultural
management decisions
Item Type: | Article |
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DOI/Identification number: | 10.1016/j.jenvman.2016.08.047 |
Subjects: |
G Geography. Anthropology. Recreation > GN Anthropology Q Science |
Divisions: | Divisions > Division of Human and Social Sciences > School of Anthropology and Conservation |
Depositing User: | Robert Fish |
Date Deposited: | 17 Jan 2017 11:24 UTC |
Last Modified: | 04 Mar 2024 17:33 UTC |
Resource URI: | https://kar.kent.ac.uk/id/eprint/59893 (The current URI for this page, for reference purposes) |
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