The potential use of sediment from catfish (Pangasianodon gigas) pond as soil organic matter amendment was investigated based on determining carbon mineralization and nitrogen supplying capacity from catfish pond sediment. The rates of carbon and nitrogen mineralization analyzed from pond sediment were compared to those in alluvial soils and degraded soils. Catfish pond sediment being also applied to alluvial and degraded soils at the rate of 5 tons per ha explains how this application changed the rates of soil organic matter decomposition and soil nitrogen supplying-capacity. The results indicated that sediment sampled from catfish pond contained a wide range of organic matter and total nitrogen contents. The rates of carbon and nitrogen mineralization of sediment samples were significantly higher than those in the bare alluvial soils and degraded sandy soil (P