University of Natural Resources and Life Sciences, Vienna (BOKU) - Research portal
Gewählte Doctoral Thesis:
Franz Heinzlmaier
(2007):
Pflanzennährstoffe in Österreichs Böden: Räumliche und zeitliche Variationen sowie Wechselwirkungen mit Bodenparametern.
Doctoral Thesis,
BOKU-Universität für Bodenkultur,
pp 312.
UB BOKU
obvsg
- Abstract:
- The nutrient supply of Austrian soils with phosphorus, potassium and magnesium, their dependencies on soil parameters as well as temporal trends of nutrient contents in Austria are presented in this study. The investigated data are derived from the soil surveys of the Austrian federal states accomplished in the 90ies, which are available in the nation-wide soil information system BORIS of the Federal Environment Agency. Additional data are available from routine soil analysis of the Austrian Agency for Health and Food Safety. These data are based on soil samples of the Waldviertel and the eastern part of Austria and cover the time period from 1991 to 2003. Due to varying regional soil sampling densities, different sampling depths and analysing methods as well as incomplete data sets from the soil surveys stored in BORIS, it is necessary in a first step to generate an uniform Austrian-wide representative data collective. Starting out from that, an analysis of the nutrient contents and the soil parameters pH-value, carbonate content, clay content and humus content with regard to land use forms and mother rock as well as geological units is made. The three statistical procedures of principal component analysis, discriminant analysis and multiple linear regression are used to classify and categorize the soil parameters and to evaluate effects on plant available nutrient contents. The assessment of temporal trends in the nutrient supply is conducted with the data set from AGES concerning the available secondary production regions of Austria as well as summarizing the two primary production regions of the Nordöstliches Flach- und Hügelland and the Mühl- und Waldviertel, where the main part of the analysed soil samples comes from. The analysis and evaluation of the data sets give an overview of the supply with P, K and Mg in Austrian soils and show consequences of the diminishing nutrient application in agriculture during the last three decades.