JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2022, Vol. 46 ›› Issue (6): 146-156.doi: 10.12302/j.issn.1000-2006.202206012

Special Issue: 南京林业大学120周年校庆特刊

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Application of functional microorganisms in ecological restoration of abandoned mines

ZHANG Jinchi(), LI Chong(), JIA Zhaohui, LIU Xin, MENG Miaojing   

  1. College of Forestry, Co-Innovation Center for Sustainable Forestry in Southern China, Jiangsu Province Key Laboratory of Soil and Water Conservation and Ecological Restoration, Nanjing Forestry University, Nanjing 210037, China
  • Received:2022-06-09 Revised:2022-07-17 Online:2022-11-30 Published:2022-11-24

Abstract:

Economic growth has historically been significantly fueled by the mining industry. However, many abandoned mines which remain after mining activities have caused significant environmental damage. Based on the background of mine ecological restoration and the influence of microorganisms on soil and plants, the author divides microorganisms into five functional microorganism categories, including plant growth-promoting rhizobacteria, mineral-solubilizing microorganism, nitrogen fixing bacteria, rhizobia and mycorrhiza fungi. This review highlights the critical role of those functional microorganisms play in soil reconstruction and revegetation, summarizes the present issues with abandoned mines, and discusses common ecological restoration strategies. It is considered that: it is ideal for functional microbial inoculant to exist constantly because they can contribute positively to the ecosystem for a long time, and it is essential to extend the survival time of microbial inoculants and make their effects last for the ecological restoration of abandoned mines. In view of the special characteristics of different types of abandoned mine ecosystems, conducting research related to in situ inoculation of microorganisms in abandoned mines, engineering and transferring microbial traits into selected effective inter-rooted microbial isolates or entire inter-rooted microbial communities to produce functional microorganisms suitable for ecological restoration of different types of abandoned mines is an urgent problem to be solved for the ecological restoration of abandoned mines; and further revealing the long-lasting mechanisms of mineral solubilization by microorganisms and determining how to mobilize nutrients through mineral solubilization as an integral part of the whole soil community to more effectively and durably exert the mineral solubilization effect of microorganisms and secure the nutrient supply for plants.

Key words: abandoned mine, ecological restoration, functional microorganisms

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