南平烟区烤烟适宜钾肥施用比例研究

[目的]明确适合南平烟区的钾肥施用比例。[方法]选取速效钾含量高、中、低田块,研究不同钾肥比例对烤烟K326产质量的影响。[结果]在土壤低钾水平下,施用钾肥能显著提高烟叶钾含量,有利于提高烟叶品质。在土壤高钾水平下,钾肥比例过高(N∶K=1∶3.2)会导致烟叶产量下降。[结论]综合考虑烟叶产质量和经济成本,不论植烟土壤是否缺钾,钾肥施用比例在2.5~2.8时,K326的产质量最好。

Study on Optimal Ratio of Nitrogen to Potassium for Flue-cured Tobacco in Nanping Area

Objective] The aim was to determine the suitable ratio of nitrogen to potassium for Nanping tobacco producing area.[Method] Experiments of different potassium fertilizer rate were conducted on yield and quality of flue-cured tobacco variety K326.[ Result] The results showed that in condition of lack of potassium soil, applying potassium fertilizer could significantly improve the application of potash fertilizer potassium content in tobacco leaves, which would help improve the quality of tobacco leaves.If ratio of nitrogen to potassium increased to 3. 2, yield decreased with high potassium level in the soil.[Conclusion] Considering the output, quality and economic costs, whether the soil was lack of potassium or not, when the potassium fertilizer rate was 2.5 to 2.8, the yield and quality of K326 were best.