Domenech-Emmanuelli, Angel M.

Profile Picture

Filters

20131
Reset filters

Settings

Citations

Publication Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    Publication
    Microorganismos indicadores de contaminación fecal en la escorrentía de un suelo enmendado con estiércol vacuno
    (2013) Domenech-Emmanuelli, Angel M.; Sotomayor-Ramírez, David; College of Agricultural Sciences; Martínez Rodríguez, Gustavo A.; Alameda, Myrna; Department of Crops and Agro-Environmental Sciences; Acosta Martínez, Jaime A.
    Dairy manure application to agricultural soils is a common disposal method of the material that will provide nutrients and organic carbon to the soils, but at the same time adds fecal indicator bacteria (FIB). The effects of vegetation, manure application levels (0, 0.7, 1.4 and 3.1 cm of manure1), rainfall after manure application (1, 3, 7 and 14 days) and elapsed time 0F after application manure (1, 7 and 14 days) on the concentrations of Escherichia coli (E. Coli) and Enterococcus spp. in runoff were measured. An undisturbed Humatas clay soil (Typic Haplohumults) in runoff trays with Brachiaria decumbens was used as the experimental unit. The simulated rainfall intensity was 70 mm hr-1 for a 30 minute runoff event. In soils without recent dairy manure application Enterococcus spp. concentrations in runoff on day 1 were higher than in soil with vegetative cover but the opposite was observed for E. coli. In soils with manure application at 1.4 cm, Enterococcus spp. concentrations in runoff were not affected by vegetative cover and were persistent in successive runoff events on days 1 to 7, but on day 14 were significantly lower than on previous days. In soils with manure application at 1.4 cm and without vegetative cover, E. coli. concentrations were persistent in successive runoff events on days 1 through 7, but on day 14 were significantly lower than on previous days; Enterococcus spp. concentrations in runoff were not affected by successive rainfall events with or without vegetative cover. Concentrations of Enterococcus spp. but not of E. coli were reduced as the number of days without rainfall increased after application. In soils with a history of manure application but without recent manure application, the recovery of Enterococcus spp. in runoff was 1% of that in the soil, while in soil with manure application the recovery was 25% of that applied and in soil. Manure management must consider the level of manure application, the time passed after manure application with the goal of reducing the concentrations of E. coli y Enterococcus spp. in runoff.