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| Gjettermann, Birgitte. |
| Weather-driven simulation modelling has become an important component of studies of soil nu-trients, both for crop growth and for losses by leaching to the environment. In order to model phosphorus (P) dynamics in soil, the mobilisation and immobilisation processes of inorganic and organic P species is important for quantifying P leaching from the unsaturated zone. The mobilization and immobilisation processes of P are represented in this project by sorption and desorption of P and by decomposition of organic matter with mineralization and immobilisation of P. The code/model presented here, referred to as the P-Model, works with another model, called Daisy. The Daisy code delivers input data of water content, water flux, temperature, inorganic nitrogen... |
| Tipo: Report |
Palavras-chave: History of organics. |
| Ano: 2004 |
URL: http://orgprints.org/5388/1/5388.pdf |
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| Gjettermann, Birgitte; Styczen, Merete; Hansen, Søren; Borggaard, Ole K.; Hansen, Hans C.B.. |
| In order to study the mobility of dissolved organic carbon (DOC) and dissolved organic P (DOP) in soil, the pH-dependent sorption of dissolved organic matter to an agricultural top- and subsoil was investigated. In general, sorption isotherms had convex shapes and DOC and DOP sorption increased with time of reaction. There was a very pronounced effect of pH resulting in much higher sorption of DOC at pH 5 than at pH 7; actually extensive desorption was observed at pH 7 especially for the topsoil. Similar sorption patterns were observed for DOP, but they were not as pronounced as for DOC. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Environmental aspects; Nutrient turnover; Soil biology; Soil quality. |
| Ano: 2004 |
URL: http://orgprints.org/5391/1/5391.pdf |
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