枸溶性钾肥与硫酸钾配施对烤烟生长及钾素积累与分配的影响

Effects of citrate soluble potassium and potassium sulfate on flue-cured tobacco growth, potassium accumulation and distribution

采用砂培方式,研究枸溶性钾肥与硫酸钾配施(质量比1∶3、1∶1和3∶1)对烤烟根系性状、根系活力及烟株钾素吸收积累的影响。结果表明,枸溶性钾肥与硫酸钾配施,可促进烤烟根系生长发育,优于单施硫酸钾和枸溶性钾肥;枸溶性钾肥与硫酸钾配施促进烟株对钾素的吸收和分配,烟株的上、中、下3部位烟叶钾素含量较单施硫酸钾的提高7.60%、23.24%和39.95%,总叶钾含量分配率分别提高8.41%、20.91%和42.03%;以75%枸溶性钾肥与25%硫酸钾配施处理效果最佳。

Sand culture was used to investigate the effect of combined application of citrate soluble potassium and potassium sulfate(in ratio of 1∶3, 1∶1 and 3∶1) on root traits, root activity and potassium accumulation of flue-cured tobacco. The results showed that combined application of citrate soluble potassium and potassium sulfate promoted tobacco root growth and development, which was superior than the single application of citrate soluble potassium or potassium sulfate;potassium content in upper, middle and lower parts of flue-cured tobacco were increased by 7.60%, 23.24% and 39.95% with combined application of citrate soluble potassium and potassium sulfate, compared with that of single potassium sulfate application; while total leaf potassium content distribution rate were increased by 8.41%, 20.91% and 42.03% with citrate soluble potassium and potassium sulfate applied in the ratio of 1∶3, 1∶1 and 3∶1, respectively. Thus citrate soluble potassium in the percentage of 75% and potassium sulfate 25% showed the best treatment effect.