不同调控措施对烟叶钾素调节效应研究初报

A Preliminary Study on the Effect of Different Regulating Measures on Potassium in Tobacco Leaves

通过田间试验,研究了施肥、打顶和涂抹生长素IAA对烟叶钾素的调节效应。结果表明,随施肥水平升高,团棵期烟叶叶片钾素含量大致呈下降趋势,旺长期呈上升趋势,圆顶期施肥水平较高的处理烟叶叶片钾素含量则呈下降趋势,而烟叶主脉钾素含量在不同时期大致呈上升趋势;留顶和移栽后追施硫酸钾结合打顶时涂1次生长素可以明显提高烟叶钾素含量,尤其后者更加明显。

The effects of fertilizing, topping and applying IAA on the potassium in tobacco leaves before and after topping stage were studied in field experiments. The results showed that, with the increase of the fertilization level, the potassium content in tobacco leaves tended to decline at rosette stage, and ascend at blooming stage; The potassium content of tobacco leaves tended to decline in the treatment of higher level of fertilization at topping stage, but the potassium content in tobacco midrib tended to ascend roughly on different stage. The potassium content in＇tobacco leaves was increased greatly by keeping its top unremoved and dressing K2SO4 after transplant, combined with applying IAA at topping.