1. Robinia pseudoacacia * * * has rhizobia, which can improve soil and increase soil organic matter and aggregate structure. Robinia pseudoacacia can fix 3.3 ~ 13.3 kg of nitrogen in soil every year, and the effect of inhibiting soil salt return after mixed sowing is very obvious.

2. Robinia pseudoacacia has certain functions of adsorbing dust, harmful gases and resisting pollution, and has strong resistance to sulfur dioxide, chlorine and hydrogen fluoride. It can resist nitrogen oxides and photochemical smog (ozone).

Ecological restoration is a comprehensive method to restore the polluted environment with the best effect and the lowest cost under the guidance of ecological principles and based on biological restoration, combining various physical restoration, chemical restoration and engineering technical measures. The smooth implementation of ecological restoration needs the participation of ecology, physics, chemistry, botany, microbiology, molecular biology, cultivation, environmental engineering and other disciplines. The restoration and maintenance of damaged ecosystem involves many ecological theories such as ecological stability, ecological plasticity and steady-state transformation.