Abstract: This paper summarized the mechanisms of soil contamination and plant damage by magnesite dusts, analyzed the amendment approaches of magnesite dusts-contaminated soil, and discussed the feasibility and key techniques of phytoremediation in the amendment. A mass of dusts, mainly magnesium carbonate and magnesium oxide, is produced when exploiting and producing magnesite, which contaminates soil and damages plant via basifying and hardening soil, and disturbs the balance between soil soluble magnesium and calcium. Though the studies on the phytoremediation of magnesite dusts-contaminated soil are fewer, it is quite feasible to remove the redundant magnesium from soil via plant absorption, metabolism, and accumulation.

Key words: N₂O emission, Controlled release fertilizer, Urea, Paddy field