A 40 day gnotobiotic microcosm experiment without addition of exogenous substrates was conducted to investigate the interactions of the bacterial feeding nematode Protorhabditis and the bacterium Pseudomonas and the resultant influence on mineralization immobilization of nitrogen and phosphorus.It was found that the bacteria numbers significantly increased in the presence of nematode with or without winter wheat( Triticum aestivum) planting and the bacteria increment was much higher in non rhi...