Submitted to: American Society of Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 7/21/2004
Publication Date: 11/5/2004
Citation: Kleinman, P.J.A., Sharpley, A.N., Saporito, L.S. 2004. Effect of incorporating and broadcasting dairy manure on phosphorus in overland and sub-surface flow[abstract]. American Society of Agronomy Abstracts. Paper #3707. Interpretive Summary: An interpretive summary is not required.
Technical Abstract: Manure application methods can change the nature of P transport. Rainfall simulation experiments using the National P Research Project protocol and column leaching experiments using 30-cm diameter intact soil columns (50-cm deep) were conducted to assess the effects of broadcasting or incorporating of dairy manure on the fate of P in overland and subsurface flow from two soils. Incorporation of manure into the soil significantly decreased dissolved P losses in both overland and subsurface flow relative to broadcasting manure, with the magnitude of the difference modified by soil. For the finer textured soil, dissolved P losses from the incorporated treatment were not significantly different from the unamended control. Even so, because manure incorporation increased erosion of soil and manure particles, total P losses from broadcast and incorporated dairy manure treatments were similar. Results highlight the trade-offs in manure management options to control agricultural P losses.