HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Related articles in JEQ Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (9) Citing Articles via Google Scholar Google Scholar Articles by Schroeder, P. D. Articles by Cabrera, M. L. Search for Related Content PubMed PubMed Citation Articles by Schroeder, P. D. Articles by Cabrera, M. L. Agricola Articles by Schroeder, P. D. Articles by Cabrera, M. L. Related Collections Surface Water Quality Nutrients Nutrient Management Soil Analysis

TECHNICAL REPORTS

Surface Water Quality

Rainfall Timing and Poultry Litter Application Rate Effects on Phosphorus Loss in Surface Runoff

^a USDA-ARS, National Soil Tilth Laboratory, Ames, IA 50011
^b University of Georgia, Department of Crop and Soil Sciences, Athens, GA 30602

^* Corresponding author (schroeder{at}nstl.gov)

Received for publication December 2, 2003. Phosphorus (P) in runoff from pastures amended with poultry litter may be a significant contributor to eutrophication of lakes and streams in Georgia and other areas in the southeastern United States. The objectives of this research were to determine the effects of litter application rate and initial runoff timing on the long-term loss of P in runoff from surface-applied poultry litter and to develop equations that predict P loss in runoff under these conditions. Litter application rates of 2, 7, and 13 Mg ha^–1, and three rainfall scenarios applied to 1- x 2-m plots in a 3 x 3 randomized complete block design with three replications. The rainfall scenarios included (i) sufficient rainfall to produce runoff immediately after litter application; (ii) no rainfall for 30 d after litter application; and (iii) small rainfall events every 7 d (5 min at 75 mm h^–1) for 30 d. Phosphorus loss was greatest from the high litter rate and immediate runoff treatments. Nonlinear regression equations based on the small plot study produced fairly accurate (r² = 0.52–0.62) prediction of P concentrations in runoff water from larger (0.75 ha) fields over a 2-yr period. Predicted P concentrations were closest to observed values for events that occurred shortly after litter application, and the relative error in predictions increased with time after litter application. In addition, previously developed equations relating soil test P levels to runoff P concentrations were ineffective in the presence of surface-applied litter.

Abbreviations: DRP, dissolved reactive phosphorus • R1, sufficient rainfall to produce 30 min of runoff immediately after litter application • R2, no rainfall for 30 d after manure application, then sufficient rainfall to produce 30 min of runoff • R3, small rainfall events every 7 d (5 min at 75 mm h^–1) for 30 d and then sufficient rainfall to produce 30 min of runoff • STP, soil test phosphorus • TP, total phosphorus • WSP, water-soluble phosphorus

Related articles in JEQ:

This Issue in Journal of Environmental Quality

JEQ 2004 33: 1947-1953. [Full Text]  

This article has been cited by other articles:

				M. S. Srinivasan, P. J. A. Kleinman, A. N. Sharpley, T. Buob, and W. J. Gburek Hydrology of Small Field Plots Used to Study Phosphorus Runoff under Simulated Rainfall J. Environ. Qual., October 24, 2007; 36(6): 1833 - 1842. [Abstract] [Full Text] [PDF]

				C. A. Volf, G. R. Ontkean, D. R. Bennett, D. S. Chanasyk, and J. J. Miller Phosphorus Losses in Simulated Rainfall Runoff from Manured Soils of Alberta J. Environ. Qual., April 5, 2007; 36(3): 730 - 741. [Abstract] [Full Text] [PDF]