Microbial Inoculants Modify the Functions of Resident Soil Microbes to Expedite the Field Restoration of the Abandoned Mine

IF 3.6 2区 农林科学 Q2 ENVIRONMENTAL SCIENCES
Chong Li, Yuxuan Shi, Zhaohui Jia, Yingzhou Tang, Jie Lin, Xin Liu, Jinchi Zhang, Christoph Müller
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Abstract

Global‐scale mining activities have had significant deleterious impacts on local ecosystems and the overall environment, which will necessitate robust restoration efforts. A practical approach includes combining microbial inoculants with the technology of external soil spray seeding. This approach holds the potential for sustainable abandoned mine site restoration by enhancing plant growth through the modulation of soil nutrients and microbial communities. Nonetheless, the detailed effects of microbial inoculants on specific aspects of soil microbial community functions and their complex interactions with plant growth remain underexplored, particularly in the context of restoration efforts. To bridge this gap, we performed a four‐year field study at an abandoned carbonate mine location, using metagenomic sequencing to evaluate the influence of microbial inoculants on soil microbial functionality. Our research revealed that introducing microbial inoculants greatly enhanced essential soil parameters and notably increased plant biomass. Additionally, these inoculants altered the functional gene makeup of the microbial community, significantly boosting the relative abundance of processes such as nitrogen fixation, nitrification, denitrification, assimilatory nitrate reduction (ANRA), dissimilatory nitrate reduction (DNRA), and organic phosphorus mineralization. Conversely, there was a decrease in the relative abundance of carbon degradation, phosphorus regulation, and transport processes. We observed strong correlations between the abundance of nitrogen and phosphorus cycles and plant biomass. Crucially, microbial inoculants affect plant biomass by initially altering soil properties and subsequently coordinating nitrogen and phosphorus cycles. These findings provide valuable insights into the role of microbial inoculants in mine site restoration and offer a theoretical foundation for their broader practical application.
微生物接种剂改变常驻土壤微生物的功能,加快废弃矿井的实地修复工作
全球规模的采矿活动对当地生态系统和整体环境造成了严重的有害影响,因此需要大力开展恢复工作。一种切实可行的方法是将微生物接种剂与外部土壤喷播技术相结合。这种方法通过调节土壤养分和微生物群落来促进植物生长,从而为废弃矿址的可持续恢复提供了可能。然而,微生物接种剂对土壤微生物群落功能的特定方面及其与植物生长的复杂相互作用的详细影响仍未得到充分探索,尤其是在修复工作中。为了弥补这一差距,我们在一个废弃的碳酸盐矿区进行了为期四年的实地研究,利用元基因组测序来评估微生物接种剂对土壤微生物功能的影响。我们的研究发现,引入微生物接种剂大大提高了土壤的基本参数,并显著增加了植物的生物量。此外,这些接种剂还改变了微生物群落的功能基因构成,显著提高了固氮、硝化、反硝化、同化硝酸盐还原(ANRA)、异化作用硝酸盐还原(DNRA)和有机磷矿化等过程的相对丰度。相反,碳降解、磷调节和迁移过程的相对丰度则有所下降。我们观察到氮和磷循环的丰度与植物生物量之间存在很强的相关性。最重要的是,微生物接种剂通过最初改变土壤特性和随后协调氮磷循环来影响植物生物量。这些发现为微生物接种剂在矿区恢复中的作用提供了宝贵的见解,并为其更广泛的实际应用提供了理论基础。
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来源期刊
Land Degradation & Development
Land Degradation & Development 农林科学-环境科学
CiteScore
7.70
自引率
8.50%
发文量
379
审稿时长
5.5 months
期刊介绍: Land Degradation & Development is an international journal which seeks to promote rational study of the recognition, monitoring, control and rehabilitation of degradation in terrestrial environments. The journal focuses on: - what land degradation is; - what causes land degradation; - the impacts of land degradation - the scale of land degradation; - the history, current status or future trends of land degradation; - avoidance, mitigation and control of land degradation; - remedial actions to rehabilitate or restore degraded land; - sustainable land management.
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