Avicennia marina simulated wetland system was set up in a greenhouse, consisting of one-year-old Avicennia marina-soil-water system. The Iran light crude oil with four various doses: 150mg(Ⅱ), 300mg(Ⅲ), 600mg(Ⅳ), 1200m(Ⅴ) and water (CL)(Ⅰ)have been discharged into wetlands twice a week for one year. The main achievements were described as follows: Treatment of oil dose of 150mg caused no harmful impact on nutrition and growth of Avicennia marina as well as bourgeon and growth of seedlings. Treatment of oil...