The redistribution of pig manure-borne contaminants after direct injection to soil was investigated in a field study. The spatial distribution of Escherichia coli, Salmonella Typhimurium Bacteriophage 28B and other slurry components in and around the injection slit was measured on day 0.15, 1, 6, 18, and 46/49 at Silstrup (sandy clay loam) and Estrup (sandy loam), Denmark. Transport of the slurry components away from the slit was slower at Silstrup in comparison to Estrup, probably because of a higher slurry dry matter content and soil clay content. Slurry NH4-N dissipated and/or was nitrified gradually at Silstrup and more rapidly at Estrup, but had disappeared completely at both sites within 49 days. The rate of disappearance of E. coli at Estrup was lower than at Silstrup. Survival of E. coli was high in the upper soil layer at both sites. The overall persistence of the bacteriophage was higher than that of E. coli at both sites, and both organisms were still observed after 49 days. Downward movement of contaminants was observed in the last part of the study at both sites due to precipitation events.
International Conference on Agricultural Engineering - Ageng 2010: Towards Environmental Technologies, Clermont-ferrand, France, 6-8 September 2010, 2010, p. 41-41
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International Conference on Agricultural Engineering AgEng 2010