State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; Institute of Environment Pollution Control and Treatment, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China.
Environ Res. 2024 Jul 1;252(Pt 4):119055. doi: 10.1016/j.envres.2024.119055. Epub 2024 May 6.
Application of biochar and inoculation with specific microbial strains offer promising approaches for addressing atrazine contamination in agricultural soils. However, determining the optimal method necessitates a comprehensive understanding of their effects under similar conditions. This study aimed to evaluate the effectiveness of biochar and Paenarthrobacter sp. AT5, a bacterial strain known for its ability to degrade atrazine, in reducing atrazine-related risks to soybean crops and influencing bacterial communities. Both biochar and strain AT5 significantly improved atrazine degradation in both planted and unplanted soils, with the most substantial reduction observed in soils treated with strain AT5. Furthermore, bioaugmentation with strain AT5 outperformed biochar in enhancing soybean growth, photosynthetic pigments, and antioxidant defenses. While biochar promoted higher soil bacterial diversity compared to strain AT5, the latter selectively enriched specific bacterial populations. Additionally, soil inoculated with strain AT5 displayed a notable increase in the abundance of key genes associated with atrazine degradation (trzN, atzB, and atzC), surpassing the effects observed with biochar addition, thus highlighting its effectiveness in mitigating atrazine risks in soil.
生物炭的应用和特定微生物菌株的接种为解决农业土壤中莠去津污染提供了有前景的方法。然而，确定最佳方法需要在相似条件下全面了解它们的效果。本研究旨在评估生物炭和 Paenarthrobacter sp. AT5（一种已知能够降解莠去津的细菌菌株）在降低大豆作物莠去津相关风险和影响细菌群落方面的有效性。生物炭和菌株 AT5 都显著提高了种植和未种植土壤中莠去津的降解，在接种菌株 AT5 的土壤中观察到的降解幅度最大。此外，菌株 AT5 的生物强化作用在促进大豆生长、光合色素和抗氧化防御方面优于生物炭。虽然生物炭与菌株 AT5 相比促进了更高的土壤细菌多样性，但后者选择性地富集了特定的细菌种群。此外，接种菌株 AT5 的土壤中与莠去津降解相关的关键基因（trzN、atzB 和 atzC）的丰度显著增加，超过了添加生物炭的效果，从而突出了其在减轻土壤中莠去津风险方面的有效性。
