本文以油菜种子为材料，研究了稀土元素镧对油菜种子透性和种子活力的影响。在0．05～2．00mol／L水平，La(3+)降低种子细胞内的电解质、K+、Ca(2+)和Na+的相对外渗量，并表现为随La(3+)浓度的增加而下降。低于0．1mol／L降低糖的相对外渗量，高于此浓度糖的相对外渗量升高。低于0．5mol／L的La(3+)能提高种子活力，但高浓度La(3+)使种子活力下降。 In this paper, rape seeds were used as materials to study the effect of lanthanum on seed permeability and seed vigor of rape. At the level of 0.05-2.00mol / L, La (3+) decreased the relative infiltration of electrolytes, K +, Ca (2+) and Na + in the seed cells and showed a decrease with La (3+) Increase and decline. Lower than 0.1mol / L reduce the relative extravasation of sugar, higher than the relative concentration of sugar extravasation. La (3+) less than 0.5mol / L can improve seed vigor, but high concentration of La (3+) decreased seed vigor.