Zhang Luwen, Xu Lixin, Zhang Zunhao, Li Jiaolin, Ren Limeng, Liu Zhichen, Zhang Yan, Chen Yuxiang
College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China.
College of Life Sciences, Jilin University, Changchun 130012, China.
Toxics. 2025 Jan 1;13(1):30. doi: 10.3390/toxics13010030.
Atrazine causes serious contamination of agricultural soils and groundwater. This study investigated the influence mechanism of sterilized soil (CKs), unsterilized soil (CKn), sterilized soil amended with 45 (SsV1), 60 (SsV2), 75 (SsV3) days of vermicompost (the maturity days of vermicompost), and unsterilized soil amended with 45 (SnV1), 60 (SnV2), 75 (SnV3) days of vermicompost on atrazine catabolism. The atrazine degradation experiment lasted for 40 days. The results showed that the atrazine degradation rates for CKs, CKn, SsV1, SsV2, SsV3, SnV1, SnV2, and SnV3 were 24%, 56.9%, 62.8%, 66.1%, 65.9%, 87.5%, 92.9%, and 92.3%, respectively. Indigenous microorganisms capable of degrading atrazine were present in unsterilized soil, and the addition of vermicompost enhanced atrazine degradation. The humic acid content of SnV2 was the highest, at 4.11 g/kg, which was 71.97% higher than that of CKn. The addition of the vermicompost enhanced the production of hydroxyatrazine, deethylatrazine, and deisopropylatrazine. Vermicompost increased the abundance of atrazine-degrading bacteria (, , etc.), and introduced new atrazine-degrading bacteria (, ). The above results showed that the best degradation of atrazine was achieved with 60 days of vermicompost addition. This study provides a new, efficient, economical, and environmentally friendly strategy for the remediation of atrazine-contaminated soil.
莠去津会对农业土壤和地下水造成严重污染。本研究调查了灭菌土壤（CKs）、未灭菌土壤（CKn）、添加了45天（SsV1）、60天（SsV2）、75天（SsV3）（蚯蚓堆肥的成熟天数）蚯蚓堆肥的灭菌土壤，以及添加了45天（SnV1）、60天（SnV2）、75天（SnV3）蚯蚓堆肥的未灭菌土壤对莠去津分解代谢的影响机制。莠去津降解实验持续了40天。结果表明，CKs、CKn、SsV1、SsV2、SsV3、SnV1、SnV2和SnV3的莠去津降解率分别为24%、56.9%、62.8%、66.1%、65.9%、87.5%、92.9%和92.3%。未灭菌土壤中存在能够降解莠去津的土著微生物，添加蚯蚓堆肥可增强莠去津的降解。SnV2的腐殖酸含量最高，为4.11 g/kg，比CKn高71.97%。添加蚯蚓堆肥增强了羟基莠去津、去乙基莠去津和去异丙基莠去津的生成。蚯蚓堆肥增加了莠去津降解菌（、等）的丰度，并引入了新的莠去津降解菌（、）。上述结果表明，添加60天蚯蚓堆肥对莠去津的降解效果最佳。本研究为莠去津污染土壤的修复提供了一种新的、高效、经济且环保的策略。
