烟草根系腐解液对莴苣的化感作用

Allelopathy of Decomposing Liquids from Tobacco Roots on Lettuce Seeds

以莴苣种子作为受体材料,研究了烟草K326根系腐解液的化感作用。结果表明:烟草根系腐解液对莴苣种子萌发和幼苗生长具有较强的化感作用,不同组分的综合化感抑制强度主要表现为酸溶性组分>中性>碱溶性组分>腐解原液,而化感促进强度则与之相反。因此,在烟草农业生产中,应重视对烟叶采收后烟根等残体物的处理。

The allelopathy of decomposing liquids from roots of tobacco K326 on lettuce seeds was studied.The results demonstrated that the decomposing liquids from tobacco roots had strong allelopathy on seed germination and seedling growth of lettuce;the inhibitory strength of integrated allelopathy of different components mainly expressed as acid soluble componentsneutral componentsalkaline soluble componentsdecomposing stock solution,while the promoting strength of allelopathy showed opposite.Therefore,it is suggested that attention should be paid to deal with tobacco withered roots after harvest during tobacco production.