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本文通过对烟草根、茎、叶生长状况的调查测定，并对根系脱氢酶活力、根系对Ｋ＋的吸收能力、叶片叶绿素含量和组成以及光合作用强度、呼吸效率等项生理指标的分析，证实烟草在同等供钾浓度下，不同性质的相伴阴离子和其浓度的变化将对Ｋ＋的吸收和效应产生明显的影响，并直接影响到烟草的生长和有关生理代谢。因此，烟田所施钾肥产生的肥效应是Ｋ＋与相伴阴离子共同作用的结果。其中ＳＯ_４~（２－）对烟草生长和Ｋ＋吸收产生的影响较大，浓度过高将产生明显的抑制作用。而Ｃｌ－对Ｋ＋的吸收和肥效干扰较轻，并对烟草生长具有一定促进作用。
In this paper, we analyzed the growth status of tobacco roots, stems and leaves, and analyzed the physiological indexes of root dehydrogenase activity, root absorption capacity of K +, chlorophyll content and composition, photosynthesis intensity and respiratory efficiency Tobacco at the same potassium concentration, the different nature of accompanying anion and its concentration will have a significant impact on the absorption and effect of K +, and directly affect the tobacco growth and related physiological metabolism. Therefore, the fertilizer effect of potassium fertilizer applied by tobacco fields is the result of the interaction between K + and accompanying anions. SO_4 ~ (2-) has a great effect on the growth of tobacco and K + absorption, and the excessive concentration will produce obvious inhibition. However, Cl- had less interference with K + absorption and fertilizer efficiency and had a certain promotion effect on tobacco growth.