In order to study the effects of calcium cyanamid on the growth and nitrate accumulation of celery , as well as the growth of weeds, the author conducted a field experiment with 4 fertilization treatments, namely not applying chemical nitrogen fertilizer ( CK) , applying normal compound fertilizer ( NR) , applying slow-release compound fertilizer ( SK) , and applying cal-cium cyanamid (PE).The results showed that: in comparison with other treatments, PE treatment significantly increased the yield, stem number, plant height and single-plant fresh stem weight of celery, while there were no significant differences in these indexes among the treatments CK, NR and SK.The nitrate content in harvested celery was the lowest in PE treatment (4530.67 mg/kg), which was lower than that in CK treatment (4834.83 mg/kg), and was significantly lower than that in NR treatment (5704.17 mg/kg) and in SK treatment (5875.83 mg/kg).The yield of weeds was significantly reduced by PE treatment.%设置对照不施化学氮肥（CK）、普通施肥（NR）、施用芹菜缓释配方肥（SK）和氰氨化钙肥料（PE）4个处理，采用大田试验研究了氰胺化钙肥料对芹菜生长和硝酸盐累积，以及杂草生长的影响。结果表明：与其他处理相比，PE处理显著促进了芹菜的生长，表现在芹菜的产量、分蘖茎数量、株高和单株茎鲜重均显著最大，CK、NR和SK之间则差异不显著；PE处理显著降低了芹菜中硝酸盐的含量，收获时PE处理芹菜硝酸盐含量为4530．67 mg／kg，低于CK（4834．83 mg／kg）处理，显著低于NR（5704．17 mg／kg）和SK（5875．83 mg／kg）处理；PE处理显著抑制了杂草生长，杂草产量显著低于其他处理，而CK、NR和SK处理之间则差异不显著。
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