2011/01/01 by Laetitia Fourrié, Fabienne Butler, Fourrie, Laurence +14
Agricultural and Biological Sciences · Environmental Science · #Bassin versant #Bretagne #Drainage #Exploitation d’élevage #Milieu aquatique #Parcelle agricole #Phosphore #Phosphore dissous #Phosphore particulaire #Phosphorus #Phosphorus and nutrient management #Phytase and its Applications #Ruissellement #Soil and Water Nutrient Dynamics #Systèmes agricoles intensifs
paper · doi:10.17180/2f0h-ya93
openalex publication_date 2011/01/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/25
A joint project was conducted for over three years on the diagnostics and solutions for limiting the transfer of agricultural phosphorous to water bodies. Agronomic phosphorous balances were calculated at the departemental level, and in Brittany where soils keep accumulating phosphorous, at the canton level too. At the livestock farm level, two main means of reducing excess phosphorous were demonstrated as being relevant: reducing mineral fertilization and improving feeding (particularly by decreasing the amount of phosphorous in mineral complements and providing phytases). At the plot level, data from field stations showed that (i) the transfer of phosphorous by runoff and drainage increased in soils enriched in phosphorous and/or when organic fertilization was applied, (ii) in drained plots, more phosphorous was lost when tillage was suppressed because of the preservation of preferential drainage channels such as worm burrows. Finally, the comparison between two watersheds highlighted the importance of protecting riverbanks for reducing the loss of phosphorous. Solutions were proposed at each level for reducing the sources of phosphorous and associated diffuse transfers.