A field plot experiment was carried out to study the effect of integrated fertilization with organic manure and chemical fertilizers on grain yield of rice, accumulation of N, P, K nutrient and nitrogen use efficiency. The study was conducted in field with eight treatments: non fetilization,organic manure, swine manure (corresponding to 10%, 20%, 30% organic manure, respectively), pig dung (corresponding to 20% organic manure), biogas slurry(corresponding to 20% organic manure), staw(corresponding to 10% organic manure), respectively. ...