云南烟区四个品种烤烟钾含量的研究

Study on potassium content in four cultivars of flue-cured tobacco in Yunnan tobacco area

采集了云南烟区烤烟上、中、下3个部位的烟叶样品5 893份,采用连续流动法检测烟叶钾含量,分析了云南烟区烤烟钾含量的变化特点.结果表明：云南烤烟上、中、下3个部位烟叶钾含量的均值分别为1.6%、1.8%、2.1%,主要分布范围和样本频率分别为1.25%~2.0%、1.25%~2.25%、1.5%~2.5%和76.4%、81.9%、73.4%,各部位烟叶钾含量大于1.5%的样本频率分别为61.0%、75.8%、91.7%.各部位烟叶钾含量在年度间存在极显著差异,4个主栽品种烟叶钾含量表现为‘红大’〉‘K326’〉‘云烟87’〉‘云烟85’;不同生态种植区域烟叶钾的含量差异极显著,其中,滇西南烟区烟叶的钾含量最高,滇东北烟区最低.

5 893 flue-cured tobacco leaf samples from 3 various leaf positions（upper,middle and lower） were collected from Yunnan tobacco area, the potassium contents of these leaves were determined by continuous flow method and the characteristics of potassium content was studied.The results showed that the average potassium contents of leaves from upper,middle and lower leaf positions were 1.6 %,1.8 % and 2.1% respectively,the potassium contents distribution range and sample frequency of each leaf positions were1.25 %~2.0 %,1.25 %~2.25 % and 1.5 %~2.5 % as well as 76.4 %,81.9 % and 73.4 %.The frequencies of samples with more than 1.5 % potassium of each position were 61.0 %,75.8 % and 91.7 % respectively.The potassium contents of leaves from each leaf position were extremely different,the potassium contents of four main tobacco cultivars were in the order of ＇Hongda＇＇K326＇ ＇Yunyan87＇＇Yunyan85＇.The potassium contents of tobacco leaves from tobacco area were also extremely different,which was the highest from southwest Yunnan while lowest from northeast Yunnan.