Using ~(15)N as a tracer,both pot experiment and field experiment(bottom less puts)were conducted at the paddy fied of Lutai farm. Recovery of fertilizer N and Soil N in rice plants was determined. The result Showed that basal dressing of anhydrous ammonia resulted in increase of yield and nitrogen uptake,while utilization of the fertilizer N by the whole plant also increased. It was also found that the yield of rice grains was increased to different extent due to the application of nitrification inhibitors...
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