Effects of Potassium Chloride Application on Development,Yield and Quality of Flue-cured Tobacco

In order to determine suitable amounts of chlorine fertilizers in Baise area,the effects of potassium chloride application rates on yield and quality of flue-cured tobacco were studied by field experiments using a tobacco(Nicotiana tabacum L.) cultivar Yunyan 85 in Baise area.The results showed that more applications of potassium chloride fertilizer could improve the agronomical characters of tobacco significantly.With the increase of amounts of potassium chloride,the yield and production value were changed in parabola path.The application of potassium chloride at 22.5 kg/ha increased yield and production value by 27.11% and 41.73%,respectively,and 45.0 kg/ha potassium chloride raised those by 21.80% and 32.32%.The application of potassium chloride at 22.5-67.5 kg/ha could also maintain the better chemical components of flue-cured tobacco and benefit the improvement of the chemical and evaluation quality of flue-cured tobacco.With the increase of amounts of potassium chloride,the content of Cl-in tobacco leaves increased obviously.Therefore,the treatment of potassium chloride at 22.5-45.0 kg/ha was appropriate for flue-cured tobacco in Baise area.