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应用８６Ｒｂ研究不同施肥量烤烟钾素营养效应，结果表明：随着施钾量的增加；在烤烟打顶期，烟叶中Ｋ２Ｏ含量，每株烤烟施２５ｇ、１５ｇ、２ｇＫ２Ｏ分别比对照增加１８７５％、１７４３％和３２９％；每株烤烟吸收肥料中Ｋ２Ｏ量，施３ｇＫ２Ｏ时分别比施１５ｇ、２ｇ和２５ｇＫ２Ｏ增加１９７４％、１３５７％和１３０１％；每株烤烟吸收总Ｋ２Ｏ量，施２５ｇＫ２Ｏ分别比ＣＫ、施１５ｇ和２ｇＫ２Ｏ增加２０７０％、８３９％和８１６％。随着施钾量增加，烤烟现蕾期每株烤烟吸收土壤中Ｋ２Ｏ量，施２ｇ、２５ｇ和３ｇＫ２Ｏ分别比施１５ｇＫ２Ｏ下降５９５％、１１４５％和１５９７％；施２ｇ、２５ｇ和３ｇＫ２Ｏ的钾肥利用率分别比施１５ｇＫ２Ｏ下降１０８９％、２８９％和４２１５％；烤烟打顶期每株烤烟干物重，施２５ｇＫ２Ｏ分别比ＣＫ施１５ｇ、２ｇＫ２Ｏ增加７４８８％、１５１５％和７０６％。
Application of 86Rb to study the effect of potassium nutrition on flue-cured tobacco with different fertilizers showed that with the increase of potassium application, the K2O content in flue-cured tobacco leaves increased by 25g, 15g, 2gK2O, Increased by 1875%, 1743% and 329% respectively. When the amount of K2O absorbed by each flue-cured tobacco fertilizer was increased by 1974% and 1357% respectively compared with the application of 15g, 2g and 25gK2O, And 1301% respectively. The total amount of K2O absorbed by each flue-cured tobacco increased by 2070%, 839% and 816% compared with CK, 15g and 2gK2O, respectively. With the increase of K application rate, the K2O content in soils absorbed by flue-cured tobacco decreased by 595%, 1145% and 1597%, respectively, compared with that of 15gK2O when applying 2g, 25g and 3gK2O. The potassium utilization rates of 2g, 25g and 3gK2O decreased by 1089%, 289% and 4215% respectively than those of 15gK2O. The dry matter weight of each flue-cured tobacco at the flue-cured tobacco top-loading period was 25gK2O, CK applied 15g, 2gK2O increased 7488%, 1515% and 706%.