Method for improving heavy metal cadmium stress resistance of French marigold and reducing cadmium enrichment

The invention belongs to the technical field of improving the heavy metal cadmium stress resistance of French marigold and reducing cadmium enrichment, and discloses a method for improving the heavy metal cadmium stress resistance of French marigold and reducing cadmium enrichment. According to the iron-based conditioner prepared through the iron-based conditioner preparation method, cadmium enrichment can be greatly reduced; meanwhile, the cadmium passivator prepared by the preparation method of the cadmium passivator plays a role in reducing the content of available cadmium and the content of organism cadmium in soil through mutual cooperation and synergistic effect of the charcoal, the quick lime and the sodium alginate in a specific proportion, so that the passivator disclosed by the invention not only has the function of passivating heavy metal cadmium in the soil in situ, but also has the function of reducing the content of heavy metal cadmium in the soil; the soil pH value can be ...