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应用８６Ｒｂ研究烤烟分次施硝酸钾的钾素营养效应，结果表明：两次追施硝酸钾比全基肥，烤烟脚叶成熟期吸收硝酸钾中钾素提高４５．０８％；吸收土壤中钾素提高４６．９９％；吸收总钾量提高４５．９１％；烤烟干物质重量提高２３．１１％，烟叶含钾量提高３４．５５％。烤烟不同生育期钾素营养效应：两次追施硝酸钾烤烟前期（现蕾期）烟叶中含钾量比后期（脚叶成熟期）高出３２．０８％，硝酸钾中钾素利用率后期比前期高出４０．４４％，烤烟前期吸收钾素主要来自硝酸钾、烤烟后期吸收钾素主要来自土壤。
Application of 86Rb to study the effect of potassium nutrition on potassium nitrate in flue-cured tobacco showed that the potassium uptake in potash leaves increased by 45.08% Increased by 46.99%, the total potassium absorption increased by 45.91%, the dry matter weight of flue-cured tobacco increased by 23.11% and the potassium content in tobacco increased by 34.55%. The effect of potassium nutrition in flue-cured tobacco at different growth stages: The content of potassium in tobacco leaves was 32.08% higher than that in the late stage (foot-leaf mature stage) in the two topdressing periods of potassium nitrate flue-cured tobacco, 40.44% higher than the previous period. The absorption of potassium from the early stage of flue-cured tobacco mainly came from potassium nitrate. The absorption of potassium from the late stage of flue-cured tobacco mainly came from the soil.