The results showed that after adding furadan into soil, soil urease activity was decreased first but increased then, indicating that the ecotoxicity of furadan was reduced gradually.

• 结果表明：呋喃丹加入土壤后，土壤脲酶活性最初受到抑制，随培养时间的延长，呋喃丹的生态毒性逐渐降低，并最终激活脲酶；