Runoff nutrient and fecal coliform content from cattle manure application to fescue plots
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Authors: D. R. Edwards, B. T. Larson, and T. T. Lim
Date: 2000
Journal: Journal of the American Water Resources Association
Volume: 36
Number: 4
Pages: 711-721
Summary of Methods: The effects of cattle manure application and duration on runoff quality with respect to N, P, and fecal coliform (FC) from fescue dominated pastures were measured at the University of Kentucky Maine Chance Agriculture Experiment Station. The impacts of runoff depth and timing of sample collection on these parameters were also assessed. Three simulated grazing treatments (ungrazed-no manure, continuous-3.7 AU/ha of manure once a week, rotational grazing- 14.8 AU/ha of manure every 4 weeks). Simulated runoff events occurred 4, 8 and 12 weeks after initial manure application. Runoff water was collected tested for N, P, and FC concentrations.
Article Summary / Main Points: Inorganic N and P concentrations were low regardless of grazing strategy or grazing duration and were usually not different from the control plots. Runoff concentrations of FC for the manure-treated plots were greater than control plots, and were not dependent on the simulated grazing strategy or duration. Runoff from well managed pasture land (at the rates simulated in this study) potentially has limited impact to the quality of runoff waters. Concentration of N, P, and FC in runoff waters decreased as the time of the runoff event increased.
Vegetation Types: Riparian and Wetlands
MLRA Ecoregions: 121 Kentucky Bluegrass
Agrovoc Control Words: Riparian zones Grazing Runoff Water
Article Review Type: Refereed
Article Type: Experimental Research
Keywords: grazing, runoff, nutrients, fecal coliform
Annotation: The results of this study illustrate the effects of applying manure on the pollutants in the runoff water. A major limitation of this study is the effect of trampling is not taken into account and the test where run in pasture situation that could differ greatly from a native range site.
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