不同施钾量对烤烟烟叶品质的影响

 通过1992～1993年在滇中烟区3个点的试验结果表明,在一定的施钾量范围内,增加施钾量能提高烟叶的含钾量,相关系数r为0.647(n=21);烟叶的含钾量与烟叶每公顷产值呈正相关(r=0.593,n=21)。本研究结果初步说明,施用合理用量的钾肥是提高烤烟烟叶品质的重要途径之一。

Effect of Various Rates of Potassium Fertilizer on the Quality of Flue-cured Tobacco Leaves

The field trials were camed out in three sorts of soil which were difference in potassium content at Lunan County from 1992～1993.Effect of various rates of potassium fertilizer on the quality of flue-cured tobacco leaves were researched.The resultS obtained are summarized as follows.1.In a certain range,increasing amounts of potassium fertilizer applied can increase the potassium content of flue-cured tobacco leaves,the correlation coefficient between applying potassium amounts and potassium content of cured leaves is 0.647(n=2l).2. There is a significant correlation between available potassium content of soils after haverst and po tas sium content of flue-cured tobacco leaves in various treatments (r=0.772 ,n=21),it shows that increasing rates of potassium fertilizer applied can increase the available potassium content of soils, and potassium content of flue-curedtobacco leaves increase.3.The correlation coefficient between potassium content of flue-cured tobacco leaves and productive value of tobacco leaves per hm² is 0.593 (n=21),it is very significant correlation.4. In order to improve quality of flue-cured tobacco leaves,180～225 kg K₂O per hm² should be applied in the low available potassium levels of soil,and 150～180 kgK₂O per hm² in the higher available potassium contents of soil.