Vliv zalesnění orné půdy a různého věku lesního porostu na tvorbu vodostabilních půdních agregátů (WSA)

Abstract

Research was focused on determination of water-stable aggregates (WSA) distribution in soil (cambisol) under different land use (forest, arable land) taking into account also the age of forest stand. Soil samples were collected at three localities separately for arable and forest soil. The localities were selected from map in places where arable land had been afforested in the past. Afterwards 30 samples were dry sieved and then wet sieved to determine the percentage of individual soil fractions of WSA, which allowed comparison of localities. Results showed that from the land use perspective, no prominent differences were evident after dry sieving. However, after the subsequent wet sieving, there was a distinct change. For arable soil, the fraction larger than 2 mm was almost entirely (98.22–98.88%) dissolved into smaller fractions, while the results of forest soil showed much better soil properties, as the largest fractions (>2 mm and 2–1 mm) were still represented in the sample in the range of 34.18% to 69.14%. From the results, it is possible to conclude that aggregation already occurs between 10 and 24 years after the establishment of the forest stand, which should be more investigated during the following research.