追施钾肥对烤烟叶片和土壤钾含量的影响

目的]探究追施钾肥对烤烟叶片和土壤钾含量的影响。方法]通过大田试验研究不同追施钾肥处理对烤烟叶片和土壤钾含量的影响。试验设T1、T2、T3、T4 4个处理。T1为不追施钾肥;T2为移栽后20 d追施K2SO4105 kg/hm2;T3为移栽后204、0 d分别追施K2SO4105 kg/hm2;T4为移栽后204、06、0 d分别追施K2SO4105 kg/hm2。结果]结果表明:追施钾肥显著提高烤烟叶片和土壤钾含量。在3个追施钾肥处理之间,烟叶钾含量、土壤速效钾含量、土壤缓效钾含量均差异显著。烟叶和土壤钾含量表现为T4>T3>T2>T1。结论]该研究为进一步探讨提高烤烟钾含量、改善烤烟品质的施钾技术提供了参考。

Effects of Dressing Potassium Fertilizer on Potassium Contents in Flue-cured Tobacco Leaves and Soil

Objective] The purpose of this research was to discuss the effect of dressing potassium fertilizer on potassium contents in flue-cured tobacco leaves and soil.Method] Through the field test the effects of different treatments of dressing potassium fertilizer on potassium contents in flue-cured tobacco leaves and soil were studied.4 treatments were set up,in which,T1 was no dressing potassium fertilizer,T2 was dressing K2SO4 105kg/hm2 on the 20th day after transplanting,T3 was dressing K2SO4 105kg/hm2 on the 20th day and the 40th day after transplanting respectively and T4 was dressing K2SO4105kg/hm2 on the 20th,40th,and 60th day after transplanting respectively.Result] Dressing potassium fertilizer increased the potassium contents in flue-cured tobacco leaves and soil significantly.The content of potassium in tobacco leaves,the contents of available potassium and slowly available potassium in soil were significantly different among 3 treatments of dressing potassium.The potassium contents in tobacco leaves and soil showed T4>T3>T2>T1. Conclusion] This research have important significance to further study on fertilizing techniques of increasing potassium content of flue-cured tobacco and improving the quality of flue-cured tobacco.