Abstract
Abstract An incubation experiment was conducted in the laboratory at 25 and 35°C during 56 d to analyze the mineralization patterns and the changes in microbial biomass in water-saturated soils amended with 6 types of organic materials (O.M.) including residues from 4 tropical plants. C and N mineralization in amended and non-amended soils was influenced by the temperature, A significantly positive correlation was observed between C mineralization and the amount of hexoses of the amended O.M. regardless of the period of incubation. A negative relationship between the N mineralized from amended O.M. and C/N ratios and the amounts of cellulose plus hemicellulose of the added O.M. was observed during the period of maximum mineralization on the 49th day at 25°C. The critical C/N ratio value for N mineralization and immobilization was observed in dhaincha (15.7) and cowpea (22.0). The pattern of changes in microbial biomass C and N was almost similar at both 25 and 35°C. The amount of biomass C and N gradually...
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