Soil properties related to water repellency in volcanic soils at Tenerife (Canary Islands, Spain): relationships with vegetation and soil parent material

摘要

Soil water repellency (SWR) was studied in 64 surface soil samples from Tenerife (Canary Islands, Spain), distributed over three different plant communities (natural and afforested Canarian pine forest, and high mountain legume scrub) and three typesof soil parent materials (basaltic and salic rocks and basaltic tephra). Soils were studied for physicochemical properties (soil pH and salinity, nutrient contents, organic C and total N, particle size fractions and parameters related to andic soil properties), as well as for common SWR tests (Water Drop Penetration Time and Molarity of the Ethanol Droplet). The results suggest that SWR is more intense in silty-textured soils, with relatively high contents in organic C and nutrients, as well as in Al-humus complexes, under afforested pine forest. Soil parent material was shown to be less decisive in this sense.