PL
Badano wpływ przedplonu sosnowego różnych klas wieku (11-50 lat) na eutroficzne gleby porolne w Beskidzie Sądeckim. Stwierdzono, że po 40-50 lalach oddziaływania przedplonów sosnowych morfologia profilów, głębokość biologiczna i właściwości fizyczne poziomów akumulacji próchnicy gleb porolnych są zbliżone do oznaczonych w glebach leśnych pod drzewostanami jodłowymi. Gleby porolne różnią się od gleb użytkowanych rolniczo morfologią profilu i właściwościami fizycznymi.
EN
The investigation concerned the effect of two soil - forming factors, i.e. vegetal cover (pioneer pine stands) and time on eutrophic postagricultural brown soils occurring in the Jaworzyna Krynicka range (Beskid Sądecki Mts). The study included 45 soil stations, in this number 20 profiles in pioneer pine stands in the age classes Ib - 11-20, IIa - 21-30, IIb - 31-40, and III - 45-50 years (5 profiles in each age class), 20 profiles in agricultural soils neighbouring upon the pine stands, and for comparison, 5 profiles located in fir stands 80-100- year-old. The thickness of genetic layers, depth of occurrence of gleyed horizons, and the biological depth and density of soils were determined in the field, the surface water runoff being measured in conditions of a simulated storm rainfall. The grain composition of soils, specific and voluminal densities, total porosily, the structure of pores, and the air permeability of soils were determined in laboratory conditions (Tables 1, 2, Figs 1-4). The determination of phisical properties was conducted using methods applied in pedology. It was found that [he gradual changes in morphology and physical properties effected by the pioneer pine stands approximated the characteristics of postagricultural soils to forest soils occurring under the community of a Dentario gladulosae-Fagetum abietetosum subassociation. The process of reconstruction of pioneer pine stands may begin when under the litter an Ail horizon of humus accumulation reaches the thickness of 2-3 cm. This occurs at the stand age of 21-25 years.