不同施氮量对烟叶含钾量的影响

Effect of Different Nitrogen Supply on Potassium Content of Tobacco Leaf

在施纯氮分别为 90kg/hm2 、12 0kg/hm2 、15 0kg/hm2 、180kg/hm2 条件下对烟叶含钾量的影响作了研究。结果表明 :①随着氮素水平的提高 ,烟叶中K2 O含量呈升高的趋势 ;②烟叶K2 O含量随叶位的升高逐渐减少 ;③在一定范围内提高施氮量能增加烟叶产量 ,提高烟叶等级 ,但施氮量超过 15 0kg/hm2 则会使烟叶的质量明显下降 ;

The effects of N applied levels of 90kg/ha, 120kg/ha, 150kg/ha, 180kg/ha on the potassium contents of tobacco leaves were studied. The results showed that:1)the potassium contents of tobacco leaves was increased with enhancing the levels of N applied, and gradually decreased with higher stalk position.2)in range of N rates from 90kg/ha to 150kg/ha, the yields and quality of flue\|cured tobacco could be increased with higher nitrogen levels; and over 150kg/ha, the quality was significantly decreased.3)the supply of potassium in soil wasn't main reason for low potassium contents of flue\|cured tobacco leaves in Yunan.