褐土区不同钾肥施用量对烟株钾含量的影响

Effect of different potassium application rate on the potassium contents of Flue-cured tobacco in Cinnamon soil area

采用盆栽和大田试验研究了褐土区不同钾肥施用量对烟株钾含量的影响。结果表明 ,随着钾肥施用量的增加 ,根、茎、叶钾含量增加 ;随着烟株生育进程的推进 ,根、茎、叶钾含量下降 ,但随着烟株的生长根、茎、叶中钾积累量均呈增长趋势 ;钾在烟株中的分配比例为叶 >茎 >根。盆栽烟髓部钾含量随着钾肥施用量的增加在增加 ,变化范围为 2 .4 0 %～ 3.99% ;钾肥用量对烤烟花中钾含量没有影响。盆栽和大田的叶片及叶脉钾含量随钾肥施用量的增加而增加。供钾充足时 ,由下至上烟叶含钾量逐渐降低 ;供钾不足时 。

Experiments in pot and field were carried out to study the effect of different potassium application rate on the potassium contents of Flue-cured tobacco in Cinnamon soil area. With the increasing of potassium application rate, the potassium contents of root, stalk and leaf are also increasing. But with the development of Flue-cured tobacco the relative potassium contents of root, stem and leaf are decreasing, the accumulation amount of potassium are increasing. The distribution ratio of potassium in tobacco is leaf>stem>root. The potassium contents of tobacco pith in pot are increasing with the increasing of potassium application rate, the potassium contents range is 2.4%～3.99%. The potassium application rate has no influence on the flower potassium contents. The potassium contents of leaf and leaf veins are increasing with the increasing of potassium application rate. Giving the enough potassium the potassium contents of leaf are decreasing with the rising of stalk position. With the rising of stalk position the potassium contents are increasing when the potassium is given not enough.