Effects of Dressing Potassium Fertilizer on Potassium Contents in Fluecured Tobacco Leaves and Soil

[Objective] The purpose of this research was to discuss the effect of dressing potassium fertilizer on potassium contents in flue-cured tobacco leaves and soil.[Method] Through the field test the effects of different treatments of dressing potassium fertilizer on potassium contents in flue-cured tobacco leaves and soil were studied.4 treatments were set up,in which,T1 was no dressing potassium fertilizer,T2 was dressing K2SO4 105kg/hm2 on the 20th day after transplanting,T3 was dressing K2SO4 105kg/hm2 on the 20th day and the 40th day after transplanting respectively and T4 was dressing K2SO4105kg/hm2 on the 20th,40th,and 60th day after transplanting respectively.[Result] Dressing potassium fertilizer increased the potassium contents in flue-cured tobacco leaves and soil significantly.The content of potassium in tobacco leaves,the contents of available potassium and slowly available potassium in soil were significantly different among 3 treatments of dressing potassium.The potassium contents in tobacco leaves and soil showed T4T3T2T1. [Conclusion] This research have important significance to further study on fertilizing techniques of increasing potassium content of flue-cured tobacco and improving the quality of flue-cured tobacco.