Effects of Plant Growth Regulator on Absorption,Circulation and Contents of Potassium in Flue-cured Tobacco

[Objective] This study was to investigate the effects of plant growth regulator on accumulation and circulation of potassium in flue-cured tobacco.[Methods] Hydroponics experiment was adopted to study the effects of plant growth regulator（NAA,GA3,BR） on accumulation and circulation of potassium in flue-cured tobacco.[Results] The BR treatment increased the absorption of potassium,calcium and magnesium in flue-cured tobacco,reduced the potassium emission from the root,enhanced the accumulation and contents and promoted the circulation of potassium in the tobacco plants.There was no statistical difference between the NAA and GA3 treatment.And BR treatment was 0.52%,0.30%,0.28% higher than NAA treatment in enhancing potassium content in tobacco plants at 2,7,12 d after topping.In a word,the results showed that BR treatment was the most.[Conclusion] BR treatment could effectively enhance potassium content in tobacco plants after topping.

烟草镁素营养研究进展

镁素能促进烟草叶片光合作用和生理代谢的进行,从而促进烟株生长、改善烟叶品质,缺镁将导致叶片光合作用和生理代谢受阻,对烟株生长和烟叶品质产生不利影响。文章对镁素营养生理作用、镁素与烟草生长发育和品质形成的关系、烟草镁素缺乏原因分析、镁肥施用技术等方面的研究结果进行综述,并提出烟草镁素营养方面需要继续深入研究的问题。