Data/hora: 03/06/2024 02:54:16

Provedor de dados: | NWISRL Publications
País: | United Kingdom
Título: | Phosphorus losses in runoff after application of litter from broilers fed high-available phosphorus corn feed
Autores: | Tarkalson, D.D.; Mikkelsen, R.L.
Data: | 2007
Ano: | 2007
Palavras-chave: | Corn / maize; Nutrients; Corn; Chemistry; Mass Import - autoclassified (may be erroneous).
Resumo: | Recent efforts to reduce phosphorus (P) content of corn grain fed to poultry  have led to the development of low-phytic-acid corn. Research is needed to evaluate  the environmental impact of the application to cropland of manure from animals fed  low-phytic-acid corn. The purpose of this research was to determine P losses in  runoff from a bare Piedmont soil (cecil clay loam; clayey, kaolinitic, thermic, Typic  Kanhapludult) in the southeastern United States receiving surface applications of  broiler litter from birds fed a low-phytic-acid corn (HAP broiler litter). The HAP  litter was applied at rates of 0, 8, 16, 33, 49, 66, and 82 kg P ha-1  . Simulated  rainfall was applied at a rate of 7.6 cm hr-1 on the same day the litter sources were  applied to the plots. Runoff volumes were measured, and samples were collected at  5-min intervals for 30 min and analyzed for reactive P (RP), algal-available P  (AAP), and total P (TP). Flow-weighted concentrations and mass losses of P  increased linearly with litter application rate (r2 values ¼ 0.99). Flow-weighted concentrations  of RP in runoff increased from 2.2 to 15.4 mg RP L-1, and mass loss of  TP in runoff ranged from 1.3 to 7.3 kg P ha-1 over all application rates based on  linear regression. Runoff volume losses were 47% greater after litter applications  compare to the 0 application rate treatment. Reduced infiltration resulting from litter  particles blocking pores in the soil surface is likely the reason for the increased runoff  volumes.
Tipo: | Article
Idioma: | Inglês

Identificador:

http://eprints.nwisrl.ars.usda.gov/64/1/1229.pdf

Tarkalson, D.D. and Mikkelsen, R.L.  (2007) Phosphorus losses in runoff after application of litter from broilers fed high-available phosphorus corn feed.   Communications in Soil Science and Plant Analysis.     38:1805-1814.

Relação:

http://eprints.nwisrl.ars.usda.gov/64/

1229

Formato: | application/pdf