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Assessing strategies to mitigate phosphorus leaching from drained clay soils.
- Source :
-
Ambio [Ambio] 2018 Jan; Vol. 47 (Suppl 1), pp. 114-123. - Publication Year :
- 2018
-
Abstract
- Assessing mitigation of phosphorus (P) leaching from subsurface drainage systems is challenging due to high spatial and temporal variation in leaching. Mean measured total P leaching from a clayey soil in an eight-year study period (four replicates per treatment) was (kg ha <superscript>-1</superscript>  year <superscript>-1</superscript> ): 1.21 from shallow autumn tillage (ShT), 0.84 from unfertilised fallow (UF), 0.81 from conventional autumn ploughing (CT) and 0.57 from structure liming (SL-CT). Treatment was not significant using Richards-Baker flow index or a distance factor as covariate (p = 0.084 and 0.057). A tendency for lower leaching was obtained comparing SL-CT with ShT (p <subscript>adjusted</subscript>  = 0.060 and 0.009 respectively). A combination of measures adapted to drainage conditions and clay content in different parts of the field is proposed since P leaching was approximately halved from an adjacent field (4.3 ha) in a three-year post-period compared with a three-year pre-period for structure liming the entire field and drainage system renovation plus structure lime drain backfilling.
Details
- Language :
- English
- ISSN :
- 1654-7209
- Volume :
- 47
- Issue :
- Suppl 1
- Database :
- MEDLINE
- Journal :
- Ambio
- Publication Type :
- Academic Journal
- Accession number :
- 29159456
- Full Text :
- https://doi.org/10.1007/s13280-017-0991-x