FUNCTION OF PEATLAND LOCATED ON SECONDARY TRANSFORMED PEAT-MOORSH SOILS ON THE RATES OF THE ELUTION OF ORGANIC MATTER1 L. W. Szajdak, M. Szczepanski

szajlech@man.poznan.pl

The investigation of peatland is used to show the water quality functioning with respect to different forms of nitrogen and carbon.

There are four investigated points along to Wyskoc ditch. Two times a month during entire vegetation season the following material was taken from this four chosen sites: samples of peat, from the depth of 0-20 cm, samples of ground water from wells established for this investigation.

The elution of soil organic matter from peat-moorsh soils in broad range of pH and ionic strength was investigated. The rates of the reaction were calculated from the kinetics of first order reaction model. All experiments were repeated at different pH 6,0; 6,5; 7,0; 8,0; 8,5 of 0,5 M ammonium acetate buffer solution. The investigations have shown the impact of the properties of secondary transformed peat-moorsh soils on the rates of the dissolution of organic matter.

The rates of organic matter elution for all samples of peats were significant different at four used wavelengths A=272 nm, A=320 nm, A=465 nm, and A=665 nm. It was observed that the rates increased between A=272 nm and A=320 nm and decreased from A=465 nm to A=665 nm. Although, the lowest values of the pseudo first-order rate constants measured at A=665 nm for all samples of peats from four places ranged from 1,9524 10-4 s-1 to 2.7361 10-4 s-1.