【摘要】 通过大田试验 ,研究了不同供钾方式对烟叶含钾量的影响及提高石灰性土壤上烤烟含钾量的可能途径。结果表明 ,施钾能显著提高烟叶产量 ,其中以粉肥结合喷优丰处理效果最好。在干旱条件下 ,增施钾肥可以显著提高烟叶含钾量 ,尤其能较大幅度提高中上部烟叶含钾量。粉肥对提高烟叶含钾量的效果稍优于粒肥。采用喷施“优丰 98- 2”进行根外补钾 ,可显著提高烟叶含钾量。在石灰性土壤上 ,干旱是提高烟叶含钾量的障碍因子。仅凭土壤施钾来提高烟叶含钾量 ,效果不稳定 ,受气候影响较大。土施结合喷施叶肥 ,是提高该区烤烟烟叶含钾量的有效途径。更多还原

【Abstract】 Field experiment was conducted to study the effect of different supplying styles of potassium fertilizer on potassium content in flue cured tobacco leaves and the methods to increase the content. The result of the study demonstrates that adding potassium fertilizer may significantly increase its yield and potassium content of tobacco leaves especially of middle and upper leaves. Potassium in leaves can also be significantly increased through spray “You Feng 98 2” foliage fertilizer. In calcareous soil, drought is the key factor influencing the potassium content of tobacco leaves. Powder fertilizer is slight better than granulated fertilizer in increasing potassium content of the leaves in special arid condition. Soil application accompanying with foliage fertilization was an effective measure to increase potassium content of flue cured tobacco in calcareous soil.更多还原