Soil is an important ecosystem and at the same time filter and storage for water. With respect to flood and erosion prevention, it is important to improve water retention and infiltration rates in soils to reduce surface run-off. The aim of the study is to quantify the influence of biogenic macropores on infiltration. The effect of the cropping system and management practices on macropore density and infiltration rate was examined. Soil hydraulic conductivity was determined by soil column experiments and field investigations using a hood infiltrometer and rainfall-simulation experiments. Macropores have a great effect on hydraulic conductivity. A large macropore-density results in high infiltration rates. This relationship is described with the skinfactor, applying the Erosion-2D model to adjust infiltration rates. Conservative agricultural management practices show positive effects on earthworm population and hence macropore density. The beneficial effects of no-tillage include less soil disturbance, greater quantities of crop-residues remaining on the soil surface and increased soil moisture.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa.de:bsz:105-qucosa-131748 |
| Date | 28 January 2014 |
| Creators | Bornkampf, Constance |
| Contributors | Technische Universität Bergakademie Freiberg, Fakultät für Geowissenschaften, Geotechnik und Bergbau, Prof. Dr. rer. nat. Jürgen Schmidt, Prof. Dr. rer. nat. Jürgen Schmidt, Prof. Dr. rer. nat. Stefan Schrader |
| Publisher | Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola" |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | deu |
| Detected Language | English |
| Type | doc-type:doctoralThesis |
| Format | application/pdf |
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