Effects of Tillage Intensity on Pore System and Physical Quality of Silt-Textured Soils Detected by Multiple Methods

Weninger, Thomas, Kreiselmeier, Janis, Chandrasekhar, Parvathy, Julich, Stefan, Feger, Karl-Heinz, Schwärzel, Kai, Bodner, Gernot and Schwen, Andreas, (2019). Effects of Tillage Intensity on Pore System and Physical Quality of Silt-Textured Soils Detected by Multiple Methods. Soil Research, n/a-n/a

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  • Sub-type Journal article
    Author Weninger, Thomas
    Kreiselmeier, Janis
    Chandrasekhar, Parvathy
    Julich, Stefan
    Feger, Karl-Heinz
    Schwärzel, Kai
    Bodner, Gernot
    Schwen, Andreas
    Title Effects of Tillage Intensity on Pore System and Physical Quality of Silt-Textured Soils Detected by Multiple Methods
    Appearing in Soil Research
    Publication Date 2019-07-01
    Place of Publication Clayton South
    Publisher CSIRO Publishing
    Start page n/a
    End page n/a
    Language eng
    Abstract Understanding the effects of agricultural management practices on soil functionality is an ongoing challenge in environmental science and agricultural practice. In the present study we quantified the effects of changes in tillage intensity on soil physical quality and pore size distribution after 6, 10 and 23 years. At three long-term tillage experimental sites in central Europe we analysed soils under four different soil management systems: conventional mouldboard tillage; chiselling + rotary harrow; rotary harrow; and no till. These treatments differed in mechanical intensity and depth. Pore size distributions were calculated from soil water retention curves based on high-resolution measurements. Subsequently, fractions of functional pore size classes and indicators of soil physical quality were determined and compared between the treatments. In addition, we evaluated the performance of two calculation approaches for pore size distribution: (1) fitting of a smoothing cubic spline; and (2) a bimodal van Genuchten function. The parametric function yielded a higher proportion of storage pores by approximately 3–5%. The combination of multiple measurement and evaluation methods enabled detailed comparison of soil physical characteristics between different tillage treatments. No-till soils showed a distinct lack of transmissive pores and higher bulk density, but similar plant-available water capacity, compared with the other treatments. Under all soil management systems, aeration deficits were observed, emphasising the high vulnerability for compaction of silt-dominated arable soils with a low organic matter content. Hence, the design of agricultural soil management strategies on such soils needs to consider the risks of compaction as thoroughly as erosion or chemical degradation.
    UNBIS Thesaurus SOIL MANAGEMENT
    Keyword high-resolution measurements
    hydraulic soil properties
    pore size distribution
    soil degradation
    Copyright Holder CSIRO
    Copyright Year 2019
    Copyright type Creative commons
    DOI 10.1071/SR18347
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    Created: Mon, 29 Jul 2019, 23:12:53 JST by Claudia Matthias on behalf of UNU FLORES