It wassuggested that earthworm be bred and the pteridophyte beplanted instead of recycling the rice straw back to the farm-Iand to reduce and control the Cd contamination.

• 提出了不搞稻草还田，而是采用养殖蚯蚓和种植蕨类植物的方法，以达到控制镉污染和净化土壤的目的。