Main Article Content
Buffering properties, their spatial and vertical variability and factors influencing them, were studied in the soils of mill-pond basin in the valley of the Jarosławianka Creek (northern Poland). Layered, mud-alluvial deposits were accumulated on the bed of buried bog soils from 1351 until the mid of the twentieeth century, and during the last few decades, along the creek channel, were covered by overbank deposits. Three soil profiles located in the upper, central and lower parts of mill-pond basin were studied. Buffering capacity of the soils was among low and medium values compare to the data for different soil types in Poland. In the horizons developed from pond deposits buffering area of alkali (P-NaOH) ranged from 13.5 to 57.4 cm2, and buffering area of acids (P-HCl) from 6.4 to 40.8 cm2. In horizons developed from overbank deposits it was 3.4-58.6 cm2 and 5.6-36.8 cm2 respectively. An increasing in P-HCl and decreasing in P-NaOH trends were observed down the pond basin. P-NaOH was positively related to the content of TOC and P-HCl positively related to the content of clay fraction, carbonates and TOC, specific surface area, pH, CEC and BS.
Key words: bog soils, buffer capacity, mill-ponds, riparian buffers