Response of arbuscular mycorrhizal fungi and phosphorus solubilizing bacteria to remediation abandoned solid waste of coal mine

Yinli Bi,Rongrong Liu,Li Xiao

doi:10.1007/s40789-019-00270-7

Yinli Bi, Rongrong Liu + Show 1 more

Open Access

https://doi.org/10.1007/s40789-019-00270-7

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Abstract

Coal is the vital resource of energy in China, but abandoned coal ash and gangue lead to the degradation of vegetation cover and reduce soil quality. Both arbuscular mycorrhizal fungi (AMF) and phosphate solubilizing bacteria (PSB) play a key role in biogeochemical cycle such as soil organic matter decomposition, nutrition release, and energy flow. To improve and reclamation the soil quality and ecological efficiency of the coal mining waste, we investigated the effects of an AMF strain (Glomus mosseae) and a PSB strain (Pantoesstewarti) on phytate mineralization and subsequent transfer to the host plant (Medicago sativa L.) using a two-compartment microcosm with a central 30 mm nylon mesh barrier. The results showed that significantly higher available P (AP), above ground biomass (AGB) and underground biomass (UGB) were in combined inoculation of AMF-PSB than other treatments in root and hyphae compartment. The microbial inoculum of the AMF or PSB had a significant influence on soil acid phosphatase activities (ACP). AMF-PSB enhanced phytate mineralization, improved plant biomass. AP and ACP positively influenced the AGB and UGB. AMF-PSB could be used as bioinoculant to enhance sustainable production of the plant in abandoned solid waste of coal mine.

Highlights

Coal is the vital resource of energy in China (Lam 2005), which had great contributions to the economic and social development for many years (Liu and Diamond 2005; Miao and Marrs 2000)
To improve and reclamation the soil quality and ecological efficiency of the coal mining waste, we investigated the effects of an arbuscular mycorrhizal fungi (AMF) strain (Glomus mosseae) and a phosphate solubilizing bacteria (PSB) strain (Pantoesstewarti) on phytate mineralization and subsequent transfer to the host plant (Medicago sativa L.) using a two-compartment microcosm with a central 30 mm nylon mesh barrier
The microbial inoculum of the AMF or PSB had a significant influence on soil acid phosphatase activities (ACP)

Summary

Introduction

Coal is the vital resource of energy in China (Lam 2005), which had great contributions to the economic and social development for many years (Liu and Diamond 2005; Miao and Marrs 2000). Previous studies found that rhizosphere microbial processes had diverse effects on performance of the planted tree and plant community succession promoted reclaimed soil fertility in degraded coal mining area (Sinha et al 2009; Pedrol et al 2010). Previous studied found that AMF alleviate root damage stress induced by simulated coal mining subsidence ground fissures (Bi et al 2019b) and increase plant diversity in mining land remediation (Bi and Shen 2019). Through the development of vegetation and plants, mutualistic fungal and bacterial associations have provided key metabolites (e.g. phosphorus, nitrogen, microelements) to their hosts, and thereby play a major role in plant colonization in terrestrial ecosystems (Barker et al 2017)

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