Modifying agent for rare earth mine tailing cut-over land and vegetation recovery method of rare earth mine tailing cut-over land

Abstract

The invention discloses a modifying agent for rare earth mine tailing cut-over land and a vegetation recovery method of the rare earth mine tailing cut-over land. Through preparation of the effective modifying agent and the effective vegetation recovery method, the ecological idea and ecological means are used for achieving soil fertility recovery and vegetation recovery of the ion-type rare earth mine tailing cut-over land, and the vegetation recovery method which is good and durable in recovery effect, capable of well improving the soil fertility level, ecological and environment-friendly is provided.

Description

technical field [0001] The invention relates to the field of ecological management of rare earth mine tailings traces, in particular to an improvement agent for rare earth mine tailings traces and a vegetation restoration method thereof. Background technique [0002] The mining of ion-type rare earth ores, especially in the early days, often adopts the heap leaching process. The heap leaching process means that the ore rich in rare earths is transported from the weathered layer and semi-weathered layer under the topsoil to the heap leaching field, and is repeatedly leached by ammonium sulfate. , to obtain the rare earth mother liquor, but left behind a large area of ​​rare earth tailings. [0003] These tailings not only occupy a large amount of land resources, but also destroy the normal vegetation in and around the mining area, accompanied by serious soil erosion, resulting in local river blockage, farmland flooding, and reservoir siltation. The residual ammonium sulfate ...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, there are the following methods for regreening rare earth tailings: there are methods such as directly planting corn, fir, masson pine and eucalyptus without improvement; there are also methods of covering fertile foreign soil; there are also methods of applying a large amount of chemical fertilizers, In order to improve the regreening effect of tailing sand land; the above methods have poor regreening effect, high cost, soil source cannot be guaranteed, chemical fertilizer and tailing sand cannot co-exist, and chemical fertilizer is easy to affect the environment, causing agricultural non-point source pollution, and then affecting human beings living environment

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