Fractional and group composition of organic matter in virgin and reclaimed peat soils.

摘要

The fractional and group composition of organic matter in peat soils of long-term agricultural experiments at the Polesie, Minsk, Ivantsevich, and Sarny experimental stations, Belarus, was studied. It is shown that the group composition of organic matter in reclaimed peat soils mainly depends on the geobotanic nature of peat and varied slightly during agricultural use. In contrast, the fractional composition of humic acids changed considerably. Soils were enriched with a biochemically stable fraction extracted with sodium pyrophosphate and were depleted of a biochemically less stable fraction additionally extracted with alkali.