【摘要】 利用１５Ｎ标记尿素对不同生育期参株氮素营养和床土中氮素营养进行了研究。试验结果表明，人参对１５Ｎ标记肥料吸收较少，第１年利用率为９８５％，２年累积利用率为１９０６％；标记肥料氮回收率较高，第１年为８１５９％，第２年为６９７８％；氮素肥料损失，第１年为１８４１％，２年共损失３０２２％。更多还原

【Abstract】 The experiment results showed that the nitrogen fertilized utilization rate was 985% in the lst year, the accumulative utilization rate was 1906% in two years The 15N nitrogen fertilizer recovery rate was　8158% and 6978% in the 1st year and 2nd year, respectively The 15N nitrogen fertilizer loss rate was 1841% in the 1st year and the accumulative loss rate was 3022% in two years更多还原