Assessing strategies to mitigate phosphorus leaching from drained clay soils
| Autor: | Barbro Ulén, Pia Geranmayeh, Mats Larsbo, Johannes Koestel, Maria Blomberg, Qarin Hellner |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
business.product_category
0208 environmental biotechnology Geography Planning and Development Soil science 02 engineering and technology engineering.material Article Plough Soil Environmental Chemistry Soil Pollutants Leaching (agriculture) Drainage Drainage system (agriculture) Lime Lime-filter ditch geography geography.geographical_feature_category Ecology Hydrological index Soil classification Agriculture Phosphorus 04 agricultural and veterinary sciences General Medicine Drain renovation Soil tillage 020801 environmental engineering Tillage Agronomy Soil water 040103 agronomy & agriculture engineering 0401 agriculture forestry and fisheries Environmental science Clay Aluminum Silicates business |
| Zdroj: | Ambio |
| ISSN: | 1654-7209 |
| Popis: | 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-1 year-1): 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 adjusted = 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. |
| Databáze: | OpenAIRE |
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