Peer-Reviewed Journal Details
Mandatory Fields
Regan, J.T., Rodgers, M., Healy, M.G., Kirwan, L., Fenton, O.
2010
November
Journal Of Environmental Quality
Determining phosphorus and sediment release rates from five Irish tillage soils.
Published
Altmetric: 2WOS: 27 ()
Optional Fields
tilage phosphorus runoff soils sediment
39
185
192
The aim of this study was to compare the nutrient and sediment releases from 5 Irish tillage soils, inclined at 10 and 15-degree slopes, under a simulated rainfall intensity of 30 mm hr-1 in a controlled laboratory study. Using the relationship between soil test phosphorus (STP) in the 5 soils and the dissolved reactive phosphorus (DRP) released in surface runoff, a runoff dissolved phosphorus risk indicator (RDPRI) was developed to identify the STP level for Irish tillage soils above which there may be a potential threat to surface water quality. The results of this study indicated that tillage soils may produce surface runoff phosphorus (P) concentrations in excess of 30 Ķg L-1 (the value above which eutrophication of rivers is likely to occur and the maximum allowable concentration of DRP in rivers under the EU Water Framework Directive, WFD) if their Morganís P (Pm), Mehlich 3 P (M3-P), and water extractable P (WEP) concentrations exceed 9.5 mg L-1, 67.2 mg kg-1 and 4.4 mg kg-1, respectively. This work reinforces the statutory agronomic based requirements of the European Communities (Good Agricultural Practice for Protection of Waters) Regulations 2009 (S.I. No. 101 of 2009). A statistical analysis showed that WEP gave the best prediction for runoff DRP.
10.2134/jeq2008.0514
Grant Details
Teagasc
Publication Themes