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白肋烟是一种需氮量极高（是烤烟的３～４倍）的烟草类型。在高氨条件下白肋烟对钾素的供应水平更为敏感。试验结果表明，若不施钾肥，土壤的有效钾（１２０ｍｇ／ｋｇ）仅能维持白肋烟３０天的正常生长。只有当施人肥料中的Ｎ：Ｋ＿２Ｏ达到１：３后才能保证白肋烟整个生长过程基本正常。在烟株生长过程中每积累３０ｋｇ干物质需吸收１ｋｇＫ＿２Ｏ才能保证烟株正常生长。
Burley tobacco is a type of tobacco that requires extremely high amounts of nitrogen (three to four times that of flue-cured tobacco). Burley tobacco is more sensitive to the supply of potassium under high ammonia conditions. The results showed that the available potassium (120mg / kg) could only maintain the normal growth of Burley tobacco for 30 days if no potassium was applied. Only when the manure fertilizer N: K_2O reached 1: 3 to ensure that burley throughout the growth process is normal. During the growth of tobacco plants, 30 kg of dry matter will accumulate 30 kg of dry matter to absorb 1 kg of K 2 O to ensure the normal growth of tobacco plants.