Characteristics of nitrogen utilization under different nitrogen strategies of potato

In this study,the uptakes,accumulations and allocation of nitrogen,and NUE,efficiency analysis under different applying nitrogen rates were evaluated.It showed that,the absorption and accumulates of nitrogen increased with the increase of nitrogen rate,while the production value,NUE and benefit of N fertilizer decreased after increased,the maximal value of PE and benefit of N fertilizer emerged when the nitrogen rate was 135 kg·hm-2,and the maximal production value occurred when the nitrogen rate was 210 kg·hm-2.