Application of novel citric acid-soluble potash fertilizer capable of partially replacing potassium sulfate in sweet potato production

The invention provides application of a novel citric acid-soluble potash fertilizer capable of partially replacing potassium sulfate in sweet potato production, the citric acid-soluble potash fertilizer and a water-soluble potash fertilizer are applied in a mixed mode to improve the yield of sweet potatoes, and the adopted technical scheme specifically comprises the four steps of ridging and ditching, fertilization, transplanting, irrigation and film mulching. Wherein the application amount of the effective nutrient potassium (K2O) is that the ratio of the citrate-soluble potassium fertilizer to the water-soluble potassium fertilizer is 1: 1; the citric acid-soluble potassium fertilizer is applied to sweet potato production, the problem that domestic water-soluble potassium resources are insufficient in supply is effectively solved, meanwhile, the citric acid-soluble potassium fertilizer and the water-soluble potassium fertilizer are mixed and applied according to a certain proportion, the application amount