Runoff phosphorus losses as related to phosphorus source, application method, and application rate on a Piedmont soil

Land application of animal manures and fertilizers has resulted in an increased potential for excessive P losses in runoff to nutrient-sensitive surface waters. The purpose of this research was to measure P losses in runoff from a bare Piedmont soil in the southeastern United States receiving broile...

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Veröffentlicht in:Journal of environmental quality 2004-07, Vol.33 (4), p.1424-1430
Hauptverfasser: Tarkalson, D.D, Mikkelsen, R.L
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description Land application of animal manures and fertilizers has resulted in an increased potential for excessive P losses in runoff to nutrient-sensitive surface waters. The purpose of this research was to measure P losses in runoff from a bare Piedmont soil in the southeastern United States receiving broiler litter or inorganic P fertilizer either incorporated or surface-applied at varying P application rates (inorganic P, 0-110 kg P ha-1; broiler litter, 0-82 kg P ha-1). Rainfall simulation was applied at a rate of 76 mm h-1. Runoff samples were collected at 5-min intervals for 30 min and analyzed for reactive phosphorus (RP), algal-available phosphorus (AAP), and total phosphorus (TP). Incorporation of both P sources resulted in P losses not significantly different than the unfertilized control at all application rates. Incorporation of broiler litter decreased flow-weighted concentration of RP in runoff by 97% and mass loss of TP in runoff by 88% compared with surface application. Surface application of broiler litter resulted in runoff containing between 2.3 and 21.8 mg RP L-1 for application rates of 8 to 82 kg P ha-1, respectively. Mass loss of TP in runoff from surface-applied broiler litter ranged from 1.3 to 8.5 kg P ha-1 over the same application rates. Flow-weighted concentrations of RP and mass losses of TP in runoff were not related to application rate when inorganic P fertilizer was applied to the soil surface. Results for this study can be used by P loss assessment tools to fine-tune P source, application rate, and application method site factors, and to estimate extreme-case P loss from cropland receiving broiler litter and inorganic P fertilizers.
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The purpose of this research was to measure P losses in runoff from a bare Piedmont soil in the southeastern United States receiving broiler litter or inorganic P fertilizer either incorporated or surface-applied at varying P application rates (inorganic P, 0-110 kg P ha-1; broiler litter, 0-82 kg P ha-1). Rainfall simulation was applied at a rate of 76 mm h-1. Runoff samples were collected at 5-min intervals for 30 min and analyzed for reactive phosphorus (RP), algal-available phosphorus (AAP), and total phosphorus (TP). Incorporation of both P sources resulted in P losses not significantly different than the unfertilized control at all application rates. Incorporation of broiler litter decreased flow-weighted concentration of RP in runoff by 97% and mass loss of TP in runoff by 88% compared with surface application. Surface application of broiler litter resulted in runoff containing between 2.3 and 21.8 mg RP L-1 for application rates of 8 to 82 kg P ha-1, respectively. Mass loss of TP in runoff from surface-applied broiler litter ranged from 1.3 to 8.5 kg P ha-1 over the same application rates. Flow-weighted concentrations of RP and mass losses of TP in runoff were not related to application rate when inorganic P fertilizer was applied to the soil surface. Results for this study can be used by P loss assessment tools to fine-tune P source, application rate, and application method site factors, and to estimate extreme-case P loss from cropland receiving broiler litter and inorganic P fertilizers.</description><subject>Agricultural land</subject><subject>agricultural runoff</subject><subject>agricultural soils</subject><subject>Agriculture</subject><subject>Agronomy. 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Mass loss of TP in runoff from surface-applied broiler litter ranged from 1.3 to 8.5 kg P ha-1 over the same application rates. Flow-weighted concentrations of RP and mass losses of TP in runoff were not related to application rate when inorganic P fertilizer was applied to the soil surface. Results for this study can be used by P loss assessment tools to fine-tune P source, application rate, and application method site factors, and to estimate extreme-case P loss from cropland receiving broiler litter and inorganic P fertilizers.</abstract><cop>Madison</cop><pub>American Society of Agronomy, Crop Science Society of America, Soil Science Society</pub><pmid>15254125</pmid><doi>10.2134/jeq2004.1424</doi><tpages>7</tpages></addata></record>
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subjects Agricultural land
agricultural runoff
agricultural soils
Agriculture
Agronomy. Soil science and plant productions
Animal manures
Animals
application methods
application rate
Applied sciences
Biological and medical sciences
Biological Availability
Chickens
clay loam soils
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Eukaryota - physiology
Exact sciences and technology
fertilizer application
Fertilizers
Fundamental and applied biological sciences. Psychology
Kanhapludults
Litter
losses from soil
Manure
Manures
Nutrient loss
Nutrients
Phosphatic fertilizers
Phosphorus
Phosphorus - analysis
Phosphorus content
phosphorus fertilizers
piedmont soils
Pollution
Pollution, environment geology
poultry manure
Rain
rainfall simulation
Refuse Disposal
Runoff
soil nutrients
Soil Pollutants - analysis
Soil sciences
Soil surfaces
Surface runoff
Surface water
temporal variation
Water Movements
Water Pollutants - analysis
water pollution
title Runoff phosphorus losses as related to phosphorus source, application method, and application rate on a Piedmont soil
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