Study on Characteristics of Potassium and Chlorine Contents of Fluecured Tobacco in Baise Tobacco-growing Areas of Guangxi Province

For deeply understanding the characteristics of potassium and chlorine contents of flue-cured tobacco in Baise tobacco-growing areas,basic statistical characteristics of potassium and chlorine contents of flue-cured tobacco,difference of potassium and chlorine contents of flue-cured tobacco between regions,stalk positions,varieties and tillage models were studied.The results showed that potassium content was higher,but chlorine was lower,the ratio of potassium to chlorine was medium in Baise tobacco-growing areas,the content of potassium less than 2.0% accounted for 12.73 percent,the content of chlorine less than 0.3% accounted for 73.63 percent,and the ratio of potassium to chlorine more than 12 accounted for 30.91 percent.Potassium and chlorine contents of flue-cured tobacco was of difference between regions,stalk positions,varieties and tillage models,the details was as follows: the potassium content in Longlin and Tianlin county was the lowest,but the chlorine content was low in each county;the potassium content of middle leaves was higher than top leaves,but chlorine content was lower than top leaves;the contents of potassium and chlorine of Yunyan 87 variety was higher than other varieties;the contents of potassium and chlorine and the ratio of potassium to chlorine in rotation of rice and tobacco was much higher than that in rotation of maize and tobacco.