文献类型：期刊文献

英文题名：Accelerated atrazine degradation and altered metabolic pathways in goat manure assisted soil bioremediation

作者：Luo, Shuwen[1];Zhen, Zhen[1];Zhu, Xiaoping[2];Ren, Lei[1];Wu, Weijian[1];Zhang, Weijian[1];Chen, Yijie[1];Zhang, Dayi[3];Song, Zhiguang[4,5];Lin, Zhong[4,5];Liang, Yan-Qiu[4]

机构：[1]Guangdong Ocean Univ, Coll Coastal Agr Sci, Zhanjiang 524088, Peoples R China;[2]Pearl River Hydraul Res Inst, Guangzhou 510000, Peoples R China;[3]Tsinghua Univ, Sch Environm, Beijing 100084, Peoples R China;[4]Guangdong Ocean Univ, Fac Chem & Environm Sci, Zhanjiang 524088, Peoples R China;[5]Guangdong Ocean Univ, Shenzhen Res Inst, Shenzhen 518108, Peoples R China

年份：2021

卷号：221

外文期刊名：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY

收录：SCI-EXPANDED(收录号：WOS:000672581800006)、、Scopus(收录号：2-s2.0-85108273715)、WOS

基金：This work was financially supported by National Natural Science Foundation of China (41977125, 41907033, 31800109 and 41907346) , Natural Science Foundation of Guangdong (2019A1515011948, 2019A1515011889, 2018A030313131 and 2018A030307054) and the Program for Scientific Research Startup Funds of Guangdong Ocean University (R17001) .

语种：英文

外文关键词：Atrazine; Goat manure; Metabolic pathway; Bacterial community; Soil

外文摘要：The intensive and long-term use of atrazine in agriculture has resulted in serious environmental pollution and consequently endangered ecosystem and human health. Soil microorganisms play an important role in atrazine degradation. However, their degradation efficiencies are relatively low due to their slow growth and low abundance, and manure amendment as a practice to improve soil nutrients and microbial activities can solve these problems. This study investigated the roles of goat manure in atrazine degradation performance, metabolites and bacterial community structure. Our results showed that atrazine degradation efficiencies in unamended soils were 26.9-35.7% and increased to 60.9-84.3% in goat manure amended treatments. Hydroxyatrazine pathway was not significantly altered, whereas deethylatrazine and deisopropylatrazine pathways were remarkably enhanced in treatments amended with manure by encouraging the N-dealkylation of atrazine side chains. In addition, goat manure significantly increased soil pH and contents of organic matters and humus, explaining the change of atrazine metabolic pathway. Nocardioides, Sphingomonas and Massilia were positively correlated with atrazine degradation efficiency and three metabolites, suggesting their preference in atrazine contaminated soils and potential roles in atrazine degradation. Our findings suggested that goat manure acts as both bacterial inoculum and nutrients to improve soil microenvironment, and its amendment is a potential practice in accelerating atrazine degradation at contaminated sites, offering an efficient, cheap, and eco-friendly strategy for herbicide polluted soil remediation.