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

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Sharpley, A. N. Search for Related Content PubMed Articles by Sharpley, A. N. Agricola Articles by Sharpley, A. N.

The Effect of Storm Interval on the Transport of Soluble Phosphorus in Runoff¹

ABSTRACT

The effect of varying the interval between events on the transport of soluble phosphorus (P) in runoff was evaluated under simulated rainfall conditions. A decrease in soluble P concentration was observed during each runoff event although initial concentrations increased as the interval between events was decreased from 1 day to 5 min (0.027–0.033 mg/liter and 0.020–0.028 mg/liter for Bernow fine sandy loam and Woodward loam soils). This was attributed in part to a movement of soil water down the profile following cessation of runoff, resulting in a decrease in the surface soil of the "pool" of soluble P susceptible to transport in runoff. In contrast, a marked increase in the mean concentration of soluble P in runoff was observed as event interval increased from 1 to 6 days (0.018–0.026 mg/liter and 0.011–0.041 mg/liter for Bernow and Woodward soils). This increase was found to be related to the phosphatase enzyme activity of the five soils studied and could thus, be partially attributed to mineralization of organic P.

Key Words: soil organic P • mineralization

¹ Contribution from the Dep. of Agron., Oklahoma Agric. Exp. Stn., Oklahoma State Univ., Stillwater, OK 74074. Published with approval of the Director as paper no. 3725 of the Journal Series. In cooperation with an agreement with Southern Plains Watershed and Water Quality Lab., USDA-SEA, Durant, OK 74701. Agreement no. 58-7B30-8-22.

² Research Soil Chemist, Southern Plains Watershed and Water Quality Lab., USDA-SEA, Durant, Okla.

Received for publication March 14, 1980.

This article has been cited by other articles:

				R. Kroger, M. M. Holland, M. T. Moore, and C. M. Cooper Agricultural Drainage Ditches Mitigate Phosphorus Loads as a Function of Hydrological Variability J. Environ. Qual., January 4, 2008; 37(1): 107 - 113. [Abstract] [Full Text] [PDF]

				J. L. Langlois and G. R. Mehuys Intra-Storm Study of Solute Chemical Composition of Overland Flow Water in Two Agricultural Fields J. Environ. Qual., November 1, 2003; 32(6): 2301 - 2310. [Abstract] [Full Text] [PDF]

				R. V. Smith, S. D. Lennox, and J. S. Bailey Halting the Upward Trend in Soluble Phosphorus Transported from a Grassland Catchment J. Environ. Qual., November 1, 2003; 32(6): 2334 - 2340. [Abstract] [Full Text] [PDF]

				R. McDowell and A. Sharpley Phosphorus Transport in Overland Flow in Response to Position of Manure Application J. Environ. Qual., January 1, 2002; 31(1): 217 - 227. [Abstract] [Full Text] [PDF]

				R. McDowell, A. Sharpley, and G. Folmar Phosphorus Export from an Agricultural Watershed: Linking Source and Transport Mechanisms J. Environ. Qual., September 1, 2001; 30(5): 1587 - 1595. [Abstract] [Full Text] [PDF]