A comparison between the effect of fresh and dried organic materials added to soil on carbon and nitrogen mineralization

摘要: Incubation experiments were carried out at 29°C in which fresh chopped, dried or and ground material of wheat plants,Polygonum nodosum, Senecio congestus (R. Br. DC.) lucerne was mixed with a heavy calcareous loam. The C/N ratios these materials 45.9, 32.0, 19.3, 12.6, respectively. At intervals one two weeks the content mineral nitrogen treated untreated soils determined. In this way immobilised released could be calculated. Parallel to experiment production CO2 same have clearly shown that mineralization carbon incorporated organic is influenced not only by N-content, ratio amount materials, but also depends on whether plant are condition. most cases retardation rate found after drying due an increase water-soluble fraction drying. depressing effect increased mechanical breaking-up presumably surface non-soluble carbonaceous compounds.