钾肥施用方式对豫西烤烟钾含量及产质量的影响

通过大田试验研究了不同的钾肥基肥与追肥施用比例和施用量对豫西烤烟农艺性状、主要化学成分及产值的影响.结果表明,随着钾肥施用量和追施比例的增加,烟株的株高、最大叶长宽及茎围逐渐改善,其中钾肥基肥与追肥施用比例为50:50时可明显改善烟株的农艺学性状.增施钾肥可显著提高烟叶中的钾素含量,提高上部叶致香物质含量及烤烟产量、产值,降低烟叶烟碱含量.钾肥追施比例增加也可显著提高中上部烟叶中钾素含量,且有利于在中低钾水平上提高烟叶的产值及高钾水平上的中上等烟比例,对中性致香物质含量及其它常规化学成分和矿质元素含量有一定的影响.

Effects of potassium fertilization modes on potassium content,yields and quality of flue-cured tobacco leaves in western Henan province

Effects of different fertilizer amount and rations of Base K to Dress K fertilizer on agronomy character,main chemical,yield and quality of flue-cured tobacco leaves were studied by field experiment conducted in western Henan province.Results showed that plant height,maxium leaf length and width,stem thickness of tobacco plants improved gradually with the increase of potassium fertilizer either applied or dressed,in which agronomic characters of tobacco plants were effectively improved at 50: 50 base K to Dress K fertilizer.Increasing potassium fertilizer could significantly increase potassium content in tobacco leaves,total content of neutral aroma components in upper leaves,and quality and yield,whereas reduce nicotine content.Potassium content in middle and upper leaves increased significantly with the increase of dressing K fertilizer.Leaf yield at middle and lower potassium fertilizer level as well as the proportion of superior and moderate tobacco leaves at high potassium fertilizer level were improved.Moreover,effects were observed on total content of neutral aroma components,general chemical components,and mineral elements at different rations of Base K to Dress K fertilizer.