Related Experiment Video
Updated: Sep 13, 2025
07:43
Production of Arbuscular Mycorrhizal (AM) Fungal Inoculum and Phenotypic Evaluation of Rice and AM Symbiosis Under Saline Conditions
Published on: March 14, 2025
326
Bacillus amyloliquefaciens SQ-2 and Biochar: A Promising Combination for Enhancing Rice Growth in Pb/Al-Contaminated
Guohui Gao1, Xue Li1, Jiajun Ma1
1Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, College of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, China.
Microorganisms
|July 30, 2025
Summary
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.
