利用１５Ｎ示踪法研究了人参对肥料氮的利用和损失及氮对人参光合同化产物分配的影响。结果表明，人参对肥料氮利用率，１年为９８５％，２年为１９０６％；肥料回收率第１年为８１５９％，第２年为６９７８％，２年肥料氮损失率为３０２２％。供氮１０ｇ／ｍ２时，人参的１４ＣＯ２同化力以及硝酸还原酶（ＮＲ）活性最高；供氮４０ｇ／ｍ２时，总可溶性糖、蔗糖含量下降，淀粉含量增加，人参皂甙含量下降。 The effects of ginseng on the nitrogen utilization and loss of fertilizer and the effect of nitrogen on the assimilation product of ginseng were studied by 15N tracer method. The results showed that the utilization rate of nitrogen fertilizer was 985% in 1 year and 1906% in 2 years. The recovery rate of fertilizer was 8159% in the first year and 6978% in the second year. The fertilizer of two years The nitrogen loss rate is 3022%. When nitrogen concentration was10g / m2, ginseng had the highest14CO2 assimilation and nitrate reductase (NR) activity. When nitrogen supply was40g / m2, total soluble sugar and sucrose content decreased, starch content increased and ginsenoside content decreased.