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Wstępne pomiary warunków tlenowo-wodnych na przykładzie gleb doliny Odry

Janukowicz H.

Zeszyty Naukowe. Marine Sciences / Uniwersytet Szczeciński

1998

Nr 4

143-152

The author determined the ODR (oxygen diffusion rate) and water retention in the range of pH 0-2,8 in some organic and mineral soils of the Valley Odra river , the investigations showed typical relations between ODR and the moisture content of sand and loam soils. At the some time the author ascertained that the method of measurement does not give reliable results with a low moisture content (e.g. in sand soils already at pF 2,5). Soils with a heavier texture show weak oxygen influx (results obtained in the laboratory), while sand solis give results weighted by the error resulting in the laboratory from separating the sample from its natural environment and its evaporation to a given pF. The organic horizons of peat soils are featured by a low ODR measured in field conditions at full water capacity. In the laboratory an increase of ODR is visible in such samples; this is the result of an easier access of oxygen after their isolation from the profile. It is possible to conclude on a small serviceableness of the method (at the present stage) in laboratory conditions owing to possible sources of disturbance of measurements.