Abstract: 【Objective】Screen out suitable types of new compound fertilizer of potato under drip irrigation in Wuchuan County of Inner Mongolia,to investigate the effects of new compound fertilizers application on potato commercial rate,yield and economic benefits under drip irrigation.【Methods】Four new compound fertilizers were used as the test material,and eight treatments were set in two experimental designs of equivalent fertilizer（with the same price）and equivalent fertilizer（with the same total nutrient amount）.【Results】In the equivalent fertilizer test,the highest yield of A2 was 33.45×10³ kg/hm²,9.31% higher than A-CK.Except for A1,potato commercial rate of each treatment was higher than A-CK,while A3 and A2 were 14.67 and 6.33 percentage points higher than A-CK,respectively.In the comparison test of the equivalent fertilizer,the yields of B1 and B3 were the higher,39.45×10³ kg/hm² and 38.85×10³ kg/hm²,respectively,which increased by 21.20% and 19.35% compared with B-CK.Potato commercial rate of other treatments was higher than B-CK,and there was no significant difference among other treatments.【Conclusion】B3（slow controlled release fertilizer,750 kg/hm²）has a good performance in yield,economic benefit and commercial rate,and it has valuable promotion potential in Wuchuan County.

Key words: Potato, Fertilizer, Yield, Commercial rate