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在云南烟区土壤不同施钾量条件下 ,烟叶采收结束后土壤残留有效钾量甚高而烟叶钾含量仍处于较低水平。研究结果表明 :①在当前生产中高施钾量情况下土壤供钾水平不是云南烤烟含钾低的原因 ;②在正常施钾量条件下钾在烟叶中的积累率与施钾量有关 ,基本遵循Michealis Menten方程 ,云南烤烟成熟期烟叶含钾量急剧下降的现象 ,应引起重视 ;盲目提高施钾量 ,并非是提高云南烤烟含钾量的正确途径
Under the condition of different potassium application rates in Yunnan tobacco area, the available residual K content in leaves after tobacco harvesting was very high while the potassium content in leaves was still at a low level. The results showed as follows: (1) The reason for the low level of potassium in flue-cured tobacco in Yunnan is that the level of potassium supply is not high under the current high potassium application rate; (2) The rate of accumulation of potassium in the leaf is related to the amount of potassium Michealis Menten equation, the rapid decline of potassium content in the tobacco leaves of Yunnan flue-cured tobacco should pay attention to; blindly increase the amount of potassium is not the right way to improve the potassium content of Yunnan flue-cured tobacco