Effects of Nitrogen Application on Yield and Nitrogen Uptake and Utilization of Radish

[Objective]The effects of nitrogen application on yield,nutrient contents and accumulations,nitrogen uptake and utilization of the radish were studied to provide the theoretical clue for the proper fertilizer management and utilization.[Method]Plot experiments were conducted to study the effects of nitrogen application( 0,40,80,120 and 160 kg N / hm2,which were expressed as N0,N40,N80,N120and N160,respectively) on root yield,nutrient contents and accumulations,and N use efficiency of radish.[Result]The yield of the root and nutrient contents and accumulations of the radish were significantly increased with the increasing nitrogen application from 0 to 160 kg N / hm2. With 120 kg N / hm2,the root yield,N,P,K accumulations were 6. 42 × 104,68.15,11. 78 and 87. 18 kg/hm2,respectively. The nitrogen content of the stem and leaf were increasing with the increasing application of the nitrogen. However,with the increasing N application,N agronomic use efficiency,partial factor productivity and apparent recovery efficiency of the radish decreased significantly.[Conclusion]As far as yield and environmental benefits were concerned,the most appropriate nitrogen fertilizer application recommended was 120 kg N / hm2in this study.