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用１９８．０２ｍｍｏｌ／ＬＫ＋、１．２４ｍｍｏｌ／ＬＺｎ＋＋浸种均可促进种子萌发，提高发芽率。高浓度的Ｃａ＋＋（２２．５２ｍｍｏｌ／Ｌ）对种子产生一定的渗透胁迫，并起到筛选作用。Ｋ＋、Ｃａ＋＋、Ｚｎ＋＋均能提高种子活力指数和烟苗素质；浸种和液培对幼苗生长有促进作用，并能提高烟苗的抗旱能力，但其机理有所差异。在干旱胁迫时，Ｋ＋对烟苗的主要作用表现在增加细胞的保水能力上，而Ｃａ＋＋则表现为稳定细胞膜的结构，减少可溶性物质的大量渗出，使相对电导率下降，并能显著提高细胞中的ＣＡＴ活性；Ｚｎ＋＋在增强ＳＯＤ活性上有显著作用。Ｚｎ＋＋和Ｃａ＋＋均使可溶性蛋白质含量增加。试验还表明，ＮＣ８９的抗旱性好于Ｋ３２６。
With 198.02mmol / LK +, 1.24mmol / L Zn + soaking seed can promote seed germination and improve germination rate. High concentrations of Ca ++ (22.52 mmol / L) exerted some osmotic stress on the seeds and played a screening role. K +, Ca ++, Zn ++ could improve seed vigor index and quality of tobacco seedlings. Seed soaking and liquid culture could promote seedling growth and improve drought resistance of tobacco seedlings, but the mechanism was different. In drought stress, the main effect of K + on tobacco seedling is to increase the water holding ability of cells, while Ca ++ is shown to stabilize the structure of cell membrane, reduce the massive exudation of soluble substances, decrease the relative conductivity and significantly increase the cell In the CAT activity; Zn ++ has a significant role in enhancing SOD activity. Both Zn ++ and Ca ++ increased the soluble protein content. The experiment also showed that NC89 had better drought resistance than K326.