通过田间小区试验，研究了不同控释肥处理对马铃薯产量、氮素利用率和经济效益的影响，以期为控释肥在马铃薯生产中的施用和马铃薯专用控释肥生产的改进提供科学依据。结果表明，与普通肥料相比，控释肥处理的各项指标均有显著提高，其中产量平均提高了8.35%，氮素表观利用率平均提高了26.75%，产投比平均提高了39.56%。减量控释肥（80%常规量）处理的氮素利用率、产投比与常规量控释肥处理相比分别提高22.43%、13.71%。增钾处理的产量和增收率最高，与其他控释肥处理的均值相比，分别提高5.55%、7.37%，为此试验中的最优处理。

Field experiment was conducted to study the effects of controlled-release fertilizer on potato yield, nitrogen use efficiency and economic benefit, in order to providing scientific evidence for the production and application of the special controlled-release fertilizer for potato. The results indicated that: compared with ordinary fertilizer, every index was significantly increased by the application of controlled-release fertilizer, which yield increased by an average of 8.35%, apparent recovery efficiency of applied nitrogen increased by an average of 26.75%, and the ratio of output to input increased by an average of 8.35%. Compared with convention treatment of the controlled-release fertilization, the nitrogen use efficiency and the ratio of output to input increased by the reduction treatment (80% of the convention treatment), which respectively increased by 22.43% and 13.71%. The added potassium treatment had the highest yield and the rate of increased income. Compared with other controlled-release fertilization treatment, the two indexes were significantly increased by the added potassium treatment, which respectively increased by 5.55% and 7.37%. So it was the optimal treatment based on this experiment.