Bacillus amyloliquefaciens SQ-2 and Biochar: A Promising Combination for Enhancing Rice Growth in Pb/Al-Contaminated Acidic Soils
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View abstract on PubMed
Summary
This summary is machine-generated.Bacillus amyloliquefaciens SQ-2 and corn straw biochar effectively remediate heavy metal-contaminated soil, promoting rice growth by enhancing plant physiology and soil nutrients.
Area Of Science
- Environmental Microbiology
- Soil Science
- Plant Physiology
Background
- Acidic soils contaminated with lead (Pb) and aluminum (Al) pose significant challenges to rice cultivation.
- Phytoremediation and soil amendment strategies are crucial for restoring soil health and crop productivity.
Purpose Of The Study
- To investigate the efficacy of Bacillus amyloliquefaciens SQ-2, combined with corn straw biochar, in promoting rice growth in Pb/Al-contaminated acidic soil.
- To evaluate the impact of this combined treatment on rice physiological properties, soil nutrient content, and heavy metal immobilization.
Main Methods
- Bacillus amyloliquefaciens SQ-2 was applied to rice grown in contaminated soil, with and without corn straw biochar.
- Rice physiological parameters (antioxidant enzyme activity, chlorophyll, phenolic content) and soil properties (nutrients, enzyme activity) were analyzed.
- Heavy metal (Pb2+, Al3+) immobilization by SQ-2-biochar was confirmed using SEM-EDS, XRD, XPS, and FT-IR analyses.
Main Results
- SQ-2-biochar significantly enhanced rice catalase and superoxide dismutase activity, chlorophyll, and phenolic content.
- Rhizosphere soil nutrient levels, including nitrate nitrogen and available potassium, and sucrase activity were markedly improved.
- SQ-2-biochar effectively mineralized Pb2+ and Al3+, forming precipitates like Pb3(PO4)2 and AlPO4, with microbial functional groups facilitating biosorption.
Conclusions
- Bacillus amyloliquefaciens SQ-2 combined with corn straw biochar is a promising approach for remediating heavy metal-contaminated acidic soils.
- This treatment enhances rice growth by improving plant physiology, soil fertility, and immobilizing toxic metals, thereby increasing stress resistance and productivity.
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