Effects of Mineral-Solubilizing Microorganisms on Root Growth, Soil Nutrient Content, and Enzyme Activities in the Rhizosphere Soil of Robinia pseudoacacia
Open Access
- 6 January 2021
- Vol. 12 (1), 60
- https://doi.org/10.3390/f12010060
Abstract
Background: Abandoned mining sites are becoming increasingly common due to anthropogenic activities. Consequently, external-soil spray seeding technology has attracted increasing attention as a strategy to remediate them. However, significant challenges remain that greatly inhibit the efficacy of such technologies, such as insufficient nutrients available for plants. Methods: For this study, we designed an experiment, which involved the addition of mineral-solubilizing microorganisms and R. pseudoacacia seedlings to the external-soil spray seeding (ESSS) substrate, and measured the soil nutrients, enzyme activities, and root growth of R. pseudoacacia. Results: First, the combination of certain mineral-solubilizing microorganisms with ESSS advanced its efficiency by increasing the availability of soil nutrients and soil enzymatic activities in association with R. pseudoacacia. Furthermore, the improvement of root growth of R. pseudoacacia was intimately related to soil nutrients, particularly for soil total nitrogen (TN) and total sulfur (TS). In general, the effects of the J2 (combined Bacillus thuringiensis and Gongronella butleri) treatment for soil nutrients, enzyme activities, and plant growth were the strongest. Conclusion: In summary, the results of our experiment revealed that these mineral-solubilizing microorganisms conveyed a promotional effect on R. pseudoacacia seedlings by increasing the soil nutrient content. These results provide basic data and microbial resources for the development and applications of mineral-solubilizing microorganisms for abandoned mine remediation.Keywords
Funding Information
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
This publication has 77 references indexed in Scilit:
- Application of Polymer Curing Agent in Ecological Protection Engineering of Weak Rock SlopesApplied Sciences, 2019
- Cyanobacteria inoculation enhances carbon sequestration in soil substrates used in dryland restorationScience of The Total Environment, 2018
- Long term effects of Lespedeza bicolor revegetation on soil bacterial communities in Dexing copper mine tailings in Jiangxi Province, ChinaApplied Soil Ecology, 2018
- Characteristics and applications of ecological soil substrate for rocky slope vegetation in cold and high-altitude areasScience of The Total Environment, 2017
- Optimizing the formulation of external-soil spray seeding with sludge using the orthogonal test method for slope ecological protectionEcological Engineering, 2017
- Ecological potential of Epilobium dodonaei Vill. for restoration of metalliferous mine wastesEcological Engineering, 2016
- Ecological restoration of highway slope by covering with straw-mat and seeding with grass–legume mixtureEcological Engineering, 2016
- Multi‐Scale Anthropogenic Driving Forces of Karst Rocky Desertification in Southwest ChinaLand Degradation & Development, 2013
- Object‐Based Mapping of Karst Rocky Desertification using a Support Vector MachineLand Degradation & Development, 2012
- Characteristics of the optimum combination of synthetic soils by plant and soil properties used for rock slope restorationEcological Engineering, 2007