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| Metabolic mechanism of sludge-derived microbial nutrient stimulant in promoting quality of soybean |
| Received:April 01, 2025 |
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| KeyWord:microbial nutrient stimulant;soybean;nutritional quality;photosynthesis;metabolomics;antioxidant |
| Author Name | Affiliation | E-mail | | LI Zuoyue | Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Ecology, Jiangnan University, Wuxi 214122, China | | | BIAN Huichang | Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Ecology, Jiangnan University, Wuxi 214122, China | | | ZHANG Yibiao | Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Ecology, Jiangnan University, Wuxi 214122, China | | | SHEN Yao | Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Ecology, Jiangnan University, Wuxi 214122, China | | | CHEN Sisi | Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Ecology, Jiangnan University, Wuxi 214122, China | | | WANG Shuo | Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Ecology, Jiangnan University, Wuxi 214122, China
Jiangsu College Water Treatment Technology and Material Collaborative Innovation Center, Suzhou 215009, China | | | LI Ji | Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Ecology, Jiangnan University, Wuxi 214122, China
Jiangsu College Water Treatment Technology and Material Collaborative Innovation Center, Suzhou 215009, China | liji@jiangnan.edu.cn |
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| Abstract: |
| Microbial nutrient stimulant（SS-NB）recovered and extracted from activated sludge using alkali thermal hydrolysis technique contains abundant nutrients and biostimulants, which can promote crop growth and have promising applications in solid waste resource utilization and soil improvement. In this study, three treatment groups, CK（blank control）, CF（chemical fertilizer）, and SS-NB （micronutrient stimulant）, were established to investigate the effects of SS-NB on photosynthesis, nodule growth and nutritional quality of soybean, and the soybean quality and differences in soybean seed metabolism were further evaluated. The results demonstrated that SSNB considerably improved soybean photosynthesis, with nodule numbers and fresh weights increasing by 97.87% and 42.40%, respectively, as compared to CF. SS-NB significantly increased nutrient enrichment in soybean seeds, with an 8.96% increase in unsaturated fatty acid content compared to CF. The edible oil processed from soybeans in the SS-NB treatment group can effectively reduce the risks of atherosclerosis and thrombosis, offering enhanced health advantages for human populations. Furthermore, SS-NB up-regulated amino acid metabolism, fatty acid metabolism and flavonoid biosynthesis, increased the abundance of antioxidants and plant hormones in soybean, and increased the abundance of plant secondary metabolites in soybean seeds. The study shows that SS-NB promotes the improvement of soybean nutritional quality by regulating the soybean metabolic pathway. |
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