Sludge amendment accelerating reclamation process of reconstructed mining substrates

Abstract We constructed a mining soil restoration system combining plant, complex substrate and microbe. Sludge was added to reconstructed mine substrates (RMS) to accelerate the reclamation process. The effect of sludge on plant growth, microbial activity, soil aggregate stability, and aggregation-...

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Autores principales:	Dan Li, Ningning Yin, Ruiwei Xu, Liping Wang, Zhen Zhang, Kang Li
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b7840767f05e4b6fb635727d11730643
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spelling	oai:doaj.org-article:b7840767f05e4b6fb635727d117306432021-12-02T14:06:49ZSludge amendment accelerating reclamation process of reconstructed mining substrates10.1038/s41598-021-81703-92045-2322https://doaj.org/article/b7840767f05e4b6fb635727d117306432021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-81703-9https://doaj.org/toc/2045-2322Abstract We constructed a mining soil restoration system combining plant, complex substrate and microbe. Sludge was added to reconstructed mine substrates (RMS) to accelerate the reclamation process. The effect of sludge on plant growth, microbial activity, soil aggregate stability, and aggregation-associated soil characteristics was monitored during 10 years of reclamation. Results show that the height and total biomass of ryegrass increases with reclamation time. Sludge amendment increases the aggregate binding agent content and soil aggregate stability. Soil organic carbon (SOC) and light-fraction SOC (LFOC) in the RMS increase by 151% and 247% compared with those of the control, respectively. A similar trend was observed for the glomalin-related soil protein (GRSP). Stable soil aggregate indexes increase until the seventh year. In short, the variables of RMS determined after 3–7 years insignificantly differ from those of the untreated sample in the tenth-year. Furthermore, significant positive correlations between the GRSP and SOC and GRSP and soil structure-related variables were observed in RMS. Biological stimulation of the SOC and GRSP accelerates the recovery of the soil structure and ecosystem function. Consequently, the plant–complex substrate–microbe ecological restoration system can be used as an effective tool in early mining soil reclamation.Dan LiNingning YinRuiwei XuLiping WangZhen ZhangKang LiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Dan Li Ningning Yin Ruiwei Xu Liping Wang Zhen Zhang Kang Li Sludge amendment accelerating reclamation process of reconstructed mining substrates
description	Abstract We constructed a mining soil restoration system combining plant, complex substrate and microbe. Sludge was added to reconstructed mine substrates (RMS) to accelerate the reclamation process. The effect of sludge on plant growth, microbial activity, soil aggregate stability, and aggregation-associated soil characteristics was monitored during 10 years of reclamation. Results show that the height and total biomass of ryegrass increases with reclamation time. Sludge amendment increases the aggregate binding agent content and soil aggregate stability. Soil organic carbon (SOC) and light-fraction SOC (LFOC) in the RMS increase by 151% and 247% compared with those of the control, respectively. A similar trend was observed for the glomalin-related soil protein (GRSP). Stable soil aggregate indexes increase until the seventh year. In short, the variables of RMS determined after 3–7 years insignificantly differ from those of the untreated sample in the tenth-year. Furthermore, significant positive correlations between the GRSP and SOC and GRSP and soil structure-related variables were observed in RMS. Biological stimulation of the SOC and GRSP accelerates the recovery of the soil structure and ecosystem function. Consequently, the plant–complex substrate–microbe ecological restoration system can be used as an effective tool in early mining soil reclamation.
format	article
author	Dan Li Ningning Yin Ruiwei Xu Liping Wang Zhen Zhang Kang Li
author_facet	Dan Li Ningning Yin Ruiwei Xu Liping Wang Zhen Zhang Kang Li
author_sort	Dan Li
title	Sludge amendment accelerating reclamation process of reconstructed mining substrates
title_short	Sludge amendment accelerating reclamation process of reconstructed mining substrates
title_full	Sludge amendment accelerating reclamation process of reconstructed mining substrates
title_fullStr	Sludge amendment accelerating reclamation process of reconstructed mining substrates
title_full_unstemmed	Sludge amendment accelerating reclamation process of reconstructed mining substrates
title_sort	sludge amendment accelerating reclamation process of reconstructed mining substrates
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/b7840767f05e4b6fb635727d11730643
work_keys_str_mv	AT danli sludgeamendmentacceleratingreclamationprocessofreconstructedminingsubstrates AT ningningyin sludgeamendmentacceleratingreclamationprocessofreconstructedminingsubstrates AT ruiweixu sludgeamendmentacceleratingreclamationprocessofreconstructedminingsubstrates AT lipingwang sludgeamendmentacceleratingreclamationprocessofreconstructedminingsubstrates AT zhenzhang sludgeamendmentacceleratingreclamationprocessofreconstructedminingsubstrates AT kangli sludgeamendmentacceleratingreclamationprocessofreconstructedminingsubstrates
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Sludge amendment accelerating reclamation process of reconstructed mining substrates

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