不同钾肥追施量对烤烟K326生长及产质量的影响

Effects of Different Potassium Sidedressing Rates on Growth, Yield and Quality of Flue-cured Tobacco

大田试验研究了不同钾肥追施量对烤烟生长及产质量的影响。结果表明,随追钾量的增加,烟叶钾、总糖不断增加,烟碱则呈降低的趋势。烟碱、总糖、还原糖、钾、糖碱比及氮碱比与追施钾量成显著或极显著相关关系,总氮、氯及钾氯比与追钾量无显著相关性。说明不同钾肥追施量对烟叶烟碱、总糖、钾及糖碱比和氮碱比的影响较大,在所试土壤中氮磷钾最适宜施用比例为1:1:3,各项经济性状均达最大值,初烤烟叶内在化学成分相对比较协调。

Field experiment was conducted to study the effects of potassium sidedressing rates on growth, yield and quality of flue-cured tobacco, the results showed that, with the increase of potassium topdressing rate, potassium and total sugar content in leaves increased continuously, and nicotine content tended to decrease. There was significant correlation between potassium topdressing rate with nicotine, total sugar, reductive sugar, potassium content, sugar/nicotine, or nitrogen/nicotine, but no correlation with total nitrogen, chlorine, or potassium/chlorine. These were all presented that different potassium topdressing rate had a great effects on nicotine content, total sugar, potassium content, sugar/nicotine and nitrogen/nicotine of cured leaf, under the experiment condition, 1：1：3, the optimum ration of nitrogen： phosphorus： potassium supplied to the soil, was in favor of the maximum economic benefit and harmonious chemical components of cured leaves.