Soil evaluation for sustainable land use with respect to reducing ineffective phosphorus losses
Sustainable and ecological land use demands a specific soil management with respect to site and soil conditions. The specific soil phosphorus regime belongs to it. Especially with respect to environmental protection (P eutrophication of surface water by P losses from soil to water) the elaborating of an international framework for soil evaluation and soil management is required. Therfore adequate guidelines and threshold values standardized for EU and associated countries are necessary.
The aim of this project is to elaborate a method for soil evaluation with respect to P content and its plant availability (production function of the soil) and the P capacity for losses from soil to surface water (ecological function). For that purpose extensive datas from long term fertilisation experiments in Germany and the Czech Republic will be collected and interpreted, followed by derivation of soil groups with respect to P pools and their P dynamics, determination of pedotransfer functions and abstraction to soil models which characterise the type of P binding, P buffering and P mobilisation of different soils. Such soil models will be a tool for interpretation soil maps in terms of quantifying P sources, P sinks and P flux in the landscape. Furthermore this models can be used for direct soil and site comparison for site specific agriculture esp. fertilisation and nutrient management and for reducing unproductive P losses by P fixation in the soil and by P transfer from soil to water. These soil models are hypothetical in the first step of investigations. They will be critically evaluated during their practical application and statistically proved by further data sets in a following EU project with Austria, Slovakia, Poland and HungaThe long term fertilisation experiments of both project partners provide a data set which is unique in its extent, origin and site specific variation.
Homogenisation of analytical methods, characterisation of soil profiles and the basic structure of data base confirm with the guidelines of EU Soil Map and EU Soil Data Base. The results can contribute to the EU Soil Data Bank.
Financer
BMBF
Duration of project
Start date: 08/2002
End date: 07/2005
Publications
Schweitzer, K. ; Bauriegel, A. (2003): Definition von Boden-Phosphortypen zur Quantifizierung von Phosphorparamtern konkreter Bodenformen und ihre Anwendung zur standortbezogenen Bewertung des P-Austrages. DBG-Mitteilungen, Bd. 102, H2, S.697-698
K. Schweitzer, M. Kulhánek, J. Bálik (2005): Investigation of soil specific variability of P sorption parameters in soils on the basis of long term field experiments in Germany and in the Czech Republik. Conference Integrated Land and Water Resources Management: Towards Sustainable Rural Development , Mai 2005, Frankfurt/Oder, oral presentation, full text on conference CD
K. Schweitzer, Bauriegel, A. (2005): Tools for regionalisation of soil data: Classification of the phosphorus status of agriculturally used soils on the basis of soil body models. Conference Integrated Land and Water Resources Mangement: Towards Sustainable Rural Development , Mai 2005, Frankfurt/Oder, extended abstract on conference CD
Schweitzer, K. (2005): Kennzeichnung des P-Status zur flächenbezogenen Vorhersage des P-Austrages. Jahrestagung der DBG 2005, Marburg. DBG-Mitteilungen, Band 107 / Heft 2: 755-756
In Vorbereitung:
Schweitzer, K.; Kulhánek, M.; Bálik, J.: Plant available P supply of agricultural soils contra risk of P losses: A soil classification which shows natural limitations of changes in soil P content and mobility by fertilisation.
Schweitzer, K.; Kroschewski, B.; Kulhánek, M; Bálik, J.: Evaluation of soil specific P content and mobility after long term P fertilisation means of multivariate statistics.