Vermicomposting is an effective and environmentally friendly approach for eliminating soil organic contamination. Atrazine is one of the most commonly applied triazinic herbicides and frequently detected in agricultural soils. This study investigated the roles and mechanisms of two earthworm species (epigeic Eisenia foetida and endogeic Amynthas robustus) in microbial degradation of atrazine. Both earthworms accelerated atrazine degradation performance from 39.0% in sterile soils to 94.9%–95.7%, via neutralizing soil pH, consuming soil humus, altering bacterial community structure, enriching indigenous atrazine degraders and excreting the intestinal atrazine-degrading bacteria. Rhodoplanes and Kaistobacter were identified as soil indigenous degraders for atrazine mineralization and stimulated by both earthworm species. A. robustus excreted the intestinal Cupriavidus and Pseudomonas, whereas Flavobacterium was released by E. foetida. This study provides a comprehensive understanding of the distinct effects of two earthworm species on soil microbial community and atrazine degradation, offering technical supports to apply vermicomposting in effective soil bioremediation.
展开▼
机译:蠕动是消除土壤有机污染的有效和环保的方法。阿特拉津是最常用的三季尼酸除草剂之一,经常在农业土壤中检测到。本研究研究了两种蚯蚓种类(Epigeic eisenia foetida和内曲amynthas rubustus)在尿嘧啶的微生物降解中的作用和机制。蚯蚓均加速尿嘧啶的降解性能从无菌土壤的39.0%加速至94.9%-95.7%,通过中和土壤pH值,消耗土壤腐殖质,改变细菌群落结构,富集本土尿嘧啶降解并排出肠道尿素降解细菌。罗因玻璃和磷杆菌被鉴定为土着土着降解剂,用于阿特拉嗪矿化,并被蚯蚓种类刺激。 A. Robustus排出肠道崔普利斯和假单胞菌,而黄杆菌被E.Foetida释放。本研究对两种蚯蚓物种对土壤微生物群落和尿道降解的不同影响,提供了全面的了解,提供了技术支持,以应用蠕动在有效的土壤生物修复中。
展开▼