Soil Improvement in Abandoned Areas of Arid Limestone Mines—Progress in Vegetation Reconstruction Model
The ecological degradation and environmental contamination ensuing from the exploitation and operation of limestone quarries gravely undermine regional ecological security and jeopardize sustainable development.This study delves into the ecological remediation of desolate limestone quarries in arid zones.It reviews existing research on models for vegetation restoration in mined areas,tailoring these frameworks to the unique characteristics of limestone quarries in arid landscapes.The discussion foregrounds crucial considerations for vegetation restoration:the reconstruction of the soil matrix as a foundation,the selection and arrangement of plant species as the core process,and the implementation of a tailored restoration model for re-establishing the local ecosystem.Our objective is to furnish a theoretical foundation for ecological rehabilitation and the re-establishment of vegetation in arid limestone quarry wastes.In conclusion,the paper identifies future research priorities for the ecological rehabilitation and vegetation restoration models pertinent to arid limestone quarries:1)The improvement measures of soil matrix in limestone mines in arid areas need to be further studied and expanded,and the water and fertilizer retention of different soil matrices should be further studied in order to achieve more economical and efficient soil improvement goals;2)Explore more abundant ecological restoration plant species in limestone mines in arid areas and understand the drought resistance mechanism in depth,and use multi-level selection factors to screen ecological restoration plant species more scientifically and reasonably.3)The development of diverse technical approaches for ecological restoration is needed.An effective and appropriate model for vegetation reconstruction should be established in accordance with the environmental baseline conditions of the limestone quarry wastelands in arid regions,tailored to each site's specific circumstances.
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