不同施钾量对烤烟烟叶品质的影响

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

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．

The field trials were camed out in three sorts of soil which were difference inpotassium content at Lunan County from 1992～1993.Effect of various rates ofpotassium fertilizer on the quality of flue-cured tobacco leaves were researched.The re-sultS obtained are summarized as follows.1.In a certain range,increasing amounts of potassium fertilizer applied can increase thepotassium content of flue-cured tobacco leaves,the correlation coefficient between ap-plying 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 afterhavers t and po tas sium content of flue-cured to bacco leaves in various treatments(r=0.772 ,n=21),it shows that increasing rates of potassium fertilizer applied canincrease 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 leavesand productive value of tobacco leaves per hm￣2 is 0.593 (n=21),it is very signifi-cant correlation.4. In order to improve quality of flue-cured tobacco leaves,180～225 kg K_2O perhm￣2 should be applied in the low available potassium levels of soil,and 150～180 kgK_2O per hm￣2 in the higher available potassium contents of soil.