The invention discloses a blended controlled-release 
fertilizer for 
flue-cured tobacco in southwest Hubei province. The blended controlled-release 
fertilizer is composed of a coated 
nitrogen-potassiumcompound 
fertilizer with a controlled-release period of 50-70 days, 
coated urea with a controlled-release period of 30 days, a quick-acting 
ternary compound fertilizer, granular diammonium phosphateand granular 
potassium sulfate in a 
mass ratio of (14-28): (2.3-5.5): (33.5-41): (8-10): (23-33.5). The coated 
nitrogen-
potassium compound fertilizer with the 
controlled release period of 50-70 days is prepared by the following steps: mixing 
urea, 
potassium chloride and stone 
powder in a 
mass ratio of (28-32): (58-62): (8-12) to form a 
raw material mixture, 
water vapor is introduced, and the mixture is granulated, and then is coated with 
polyurethane. The compound fertilizer with different release periods provided by the invention can ensure sufficient supply of nutritional ingredients of tobaccos in the early stage, the middle stage and the later stage, the quality of the tobaccos is improved, and the labor output of later topdressing is reduced; and through reasonable matching of the 
nutrient elements and control of the release period, unnecessary loss of the 
nutrient elements is reduced, the 
utilization rate of the fertilizer is increased, environmental 
pollution is reduced, and theproduction cost is reduced.