Prediction of the P-leaching potential of arable soils in areas with high livestock densities |
| |
Authors: | Wilfried Werner Manfred Trimborn Uwe Pihl |
| |
Institution: | (1) Institute for Plant Nutrition, University of Bonn, D-531159 Bonn, Germany |
| |
Abstract: | Due to long-term positive P-balances many surface soils in areas with high livestock density in Germany are over-supplied with available P, creating a potential for vertical P losses by leaching. In extensive studies to characterize the endangering of ground water to P pollution by chemical soil parameters it is shown that the available P content and the P concentration of the soil solution in the deeper soil layers, as indicators of the P-leaching potential, cannot be satisfactorily predicted from the available P content of the topsoils. The P equilibrium concentration in the soil solution directly above ground water table or the pipe drainage system highly depends on the relative saturation of the P-sorption capacity in this layer. A saturation index of <20% normally corresponds with P equilibrium concentrations of <0.2 mg P/L. Phytoremediation may reduce the P leaching potential of P-enriched soils only over a very long period. |
| |
Keywords: | P-balance P-accumulation P-saturation index Subsoil P equilibrium concentration Phytoremediation |
本文献已被 CNKI 维普 万方数据 PubMed SpringerLink 等数据库收录! |