Volatilization and nitrification of nitrogen from urine under simulated cattle feedlot conditions
Journal Article
·
· Environ. Sci. Technol.; (United States)
Animals fed for slaughter are being concentrated in large feedlots, and, in some cases, contamination of ground and surface water supplies has resulted. In laboratory model studies, the amounts of ammonia volatilization and nitrate accumulation under simulated feedlot conditions depended on the moisture content of the soil. When urine was added every 2 days to an initially wet soil at the rate of 5ml per 21 cm/sup 2/, less than 25% of the added N was lost as ammonia and about 65% was converted to nitrate. When urine was added every 4 days to initially dry soil, essentially all the water evaporated between urine additions, and 90% of the added N was lost as ammonia. These findings suggest that the stocking rate and other management factors should be considered in pollution abatement.
- OSTI ID:
- 6541552
- Journal Information:
- Environ. Sci. Technol.; (United States), Journal Name: Environ. Sci. Technol.; (United States) Vol. 4:7; ISSN ESTHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
500600* -- Environment
Atmospheric-- Regulations-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION CONTROL
AMMONIA
ANIMALS
BIOLOGICAL MATERIALS
BIOLOGICAL WASTES
BODY FLUIDS
CATTLE
CHEMICAL REACTIONS
CONTROL
DOMESTIC ANIMALS
ELEMENTS
EVAPORATION
HYDRIDES
HYDROGEN COMPOUNDS
LAND POLLUTION
LAND POLLUTION CONTROL
MAMMALS
MATERIALS
NITRATES
NITRIFICATION
NITROGEN
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
POLLUTION
POLLUTION CONTROL
RUMINANTS
URINE
VERTEBRATES
WASTES
Atmospheric-- Regulations-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION CONTROL
AMMONIA
ANIMALS
BIOLOGICAL MATERIALS
BIOLOGICAL WASTES
BODY FLUIDS
CATTLE
CHEMICAL REACTIONS
CONTROL
DOMESTIC ANIMALS
ELEMENTS
EVAPORATION
HYDRIDES
HYDROGEN COMPOUNDS
LAND POLLUTION
LAND POLLUTION CONTROL
MAMMALS
MATERIALS
NITRATES
NITRIFICATION
NITROGEN
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
POLLUTION
POLLUTION CONTROL
RUMINANTS
URINE
VERTEBRATES
WASTES