Methods:Inspected the effect to the content of gastrodin and the yield of seed stem in the different culture medium though the way of orthogonal experiment.

The result shows that after the treatment of biological fermentation and mixing with some nutrients, reed residue can be used as medium for mushroom and vegetable culture.

In this paper, the effect of lanthanum on lead absorption in soybean seedling were researched by water culture. Lead in soybean seedling was measured by AAS.