Root induced changes of effective 1D hydraulic properties in a soil column

• DOI: 10.1007/s11104-014-2121-x
• Publication Date: 2014-04-27T06:44:48Z
• Authors: P. Scholl; D. Leitner; G. Kammerer; W. Loiskandl; H.-P. Kaul; G. Bodner
• Keywords: Macropore; Soil structure; Clogging

Roots are essential drivers of soil structure and pore formation. This study aimed at quantifying root induced changes the size distribution (PSD). The focus was on extent clogging vs. formation pores during active growth.Parameters Kosugi's lognormal PSD model were determined by inverse estimation in a column experiment with two cover crops (mustard, rye) an unplanted control. Pore dynamics described using convection-dispersion like evolution model.Rooted treatments showed wider range radii increasing volumes large macropores >500 μm micropores <2.5 μm, while fine macropores, mesopores larger decreased. non-rooted control narrowing reduced porosity over all radius classes. accurately changes, degradation not captured properly. Our demonstrated significant short term effects heterogenization system as dominant process formation.Pore is suggested partial cause for volume. important change micro- however indicates that multiple mechanic biochemical processes involved root-pore interactions.