不同施钾方式对烟叶含钾量的影响

摘要

[目的]研究不同施钾方式对烟叶含钾量等指标的影响，提高烟叶含钾量。[方法]针对硫酸钾（ K2 SO4）施肥方式共设3个处理，采用随机区组设计，每处理设3次重复，共9个小区，其他农事操作按常规进行，在同等钾肥用量条件下，探索有效提高烟叶含钾量的施钾方式。[结果]在施硫酸钾量一定的条件下，不同的施用方式对烟叶的叶面积有一定的影响；硫酸钾分期施用提高了中下部叶的含钾量，但对上部叶含钾量没起到提高作用。[结论]70％硫酸钾作为基肥塘施，30％留作追肥在旺长期1次对水浇湿的处理烟叶含钾量提高百分率最大。%Objective] To research the effects of different potassium application types on the potassium content,etc of tobacco leaves, and to enhance the potassium content of tobacco leaves.[ Method] Three treatments of K2 SO4 were designed.Random block design was adopted. Three repetitions were designed for each treatment with in all nine plots.Other farm operation was carried out according to the conventional method.Under the same potassium application amount, we researched the potassium application mode for the effective enhancement of potassi-um content in tobacco leaves.[ Result] Under a given amount of potassium sulphate application, different application methods had certain effects on leaf area.Split application enhanced the potassium content in middle and lower leaves, but still did not enhance the potassium con-tent in upper leaves.[ Conclusion] Combination of 70% potassium sulfate as base fertilizer and 30% as topdressing has the highest enhance-ment in potassium content in tobacco leaves.