Abstract: To study the situation of potato fertilization in Ulanqab,which is the main potato planting region in Inner Mongolia,a sampling survey of households in the city’s five potato planting counties was undertaken in 2016.The results indicated:In dry land,the total potato fertilizer input is 66.4-984.1 kg/hm2,and the average input is 330.9 kg/hm2;In irrigated land,the total potato fertilizer input is 118.5-2 211.9 kg/hm2,and average input is 796.3 kg/hm2.In irrigated land,the prominent existing problem is over-application of fertilizer.On the other hand,in dry land,there is a low input of potassium fertilizer.In dry land 77.2%of households used organic fertilizer;In irrigated land,only 20.3%of households used the organic fertilizer.Looking at the above factors,we should appropriately increase the topdressing proportion of nitrogen and potassium fertilizers,and should also reasonably confirm nitrogen,phosphorus and potassium fertilizer ratios in dry lands.In irrigated land,the amount of nitrogen and potassium fertilizer on potatoes should be reduced and the use of precise fertilization technology should be expanded.

Key words: Ulanqab;Potato;Current situation of fertilization