Estimating Dissolved Reactive Phosphorus Concentration in Surface Runoff Water from Major Ontario Soils

Phosphorus (P) loss from agricultural land in surface runoff can contribute to eutrophication of surface water. This study was conducted to evaluate a range of environmental and agronomic soil P tests as indicators of potential soil surface runoff dissolved reactive P (DRP) losses from Ontario soils...

Full description

Saved in:
Bibliographic Details
Published in:Journal of environmental quality 2010-09, Vol.39 (5), p.1771-1781
Main Authors: Wang, Y. T., Zhang, T. Q., Hu, Q. C., Tan, C. S., Halloran, I. P. O', Drury, C. F., Reid, D. K., Ma, B L., Ball‐Coelho, B., Lauzon, J. D., Reynolds, W. D., Welacky, T.
Format: Article
Language:English
Subjects:
Accuracy
Agricultural land
Agricultural runoff
Aluminum
Crop rotation
Dissolution
Estimating
Eutrophication
Ontario
Phosphorus
Phosphorus - analysis
Rainfall
Research projects
Runoff
Saturated soils
Soil - analysis
Soil pH
Soil surfaces
Soil testing
Soils
Solubility
Surface runoff
Surface water
Water Pollutants - analysis
Water quality
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Phosphorus (P) loss from agricultural land in surface runoff can contribute to eutrophication of surface water. This study was conducted to evaluate a range of environmental and agronomic soil P tests as indicators of potential soil surface runoff dissolved reactive P (DRP) losses from Ontario soils. The soil samples (0‐ to 20‐cm depth) were collected from six soil series in Ontario, with 10 sites each to provide a wide range of soil test P (STP) values. Rainfall simulation studies were conducted following the USEPA National P Research Project protocol. The average DRP concentration (DRP30) in runoff water collected over 30 min after the start of runoff increased (p < 0.001) in either a linear or curvilinear manner with increases in levels of various STPs and estimates of degree of soil P saturation (DPS). Among the 16 measurements of STPs and DPSs assessed, DPSM3‐2 (Mehlich‐3 P/[Mehlich‐3 Al + Fe]) (r2 = 0.90), DPSM3‐3 (Mehlich‐3 P/Mehlich‐3 Al) (r2 = 0.89), and water‐extractable P (WEP) (r2 = 0.89) had the strongest overall relationship with runoff DRP30 across all six soil series. The DPSM3‐2 and DPSM3‐3 were equally accurate in predicting runoff DRP30 loss. However, DPSM3‐3 was preferred as its prediction of DRP30 was soil pH insensitive and simpler in analytical procedure, if a DPS approach is adopted.
ISSN:0047-2425
1537-2537
1537-2537
DOI:10.2134/jeq2009.0504