| 不同施肥处理下旱地红壤中阿特拉津的环境归趋及其调控研究 |
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| 引用本文： | 董攀月,陈禹竹,曾军,林先贵,骆永明,吴宇澄.不同施肥处理下旱地红壤中阿特拉津的环境归趋及其调控研究[J].土壤,2022,54(6):1201-1209. |
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| 作者姓名： | 董攀月 陈禹竹 曾军 林先贵 骆永明 吴宇澄 |
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| 作者单位： | 中国科学院土壤环境与污染修复重点实验室南京土壤研究所,中国科学院土壤环境与污染修复重点实验室南京土壤研究所,中国科学院土壤环境与污染修复重点实验室南京土壤研究所,中国科学院土壤环境与污染修复重点实验室南京土壤研究所,中国科学院土壤环境与污染修复重点实验室南京土壤研究所,中国科学院土壤环境与污染修复重点实验室南京土壤研究所 |
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| 基金项目： | 国家重点研发计划(2019YFC1804203)和国家自然科学基金(41977132)资助。*通讯作者(ycwu@issas.ac.cn) |
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| 摘 要： | 红壤是广泛分布于我国南方地区的重要土壤类型,其低pH、低有机质含量的特征不利于微生物群落功能,可能影响有机污染物的降解。阿特拉津是常见的选择性内传导性除草剂,但目前对红壤中阿特拉津的转化规律及调控原理缺乏认识。本研究采集长期施用化肥或有机肥(猪粪)的旱地红壤,设置添加木质素和牡蛎壳粉等不同组合处理的微宇宙试验,采用同位素示踪、定量PCR、高通量测序等方法,研究施肥及土壤改良措施对红壤中阿特拉津矿化特征及降解微生物的调控作用。结果表明,在14周培养期间,旱地红壤对阿特拉津的矿化率低于0.33%。牡蛎壳粉有效提高红壤pH值、改变土壤细菌群落,大幅增加了阿特拉津的矿化,并导致atzC和trzN等降解功能基因的富集。木质素则显著增加了阿特拉津与土壤有机质的结合,但对污染物的矿化没有明显作用。本研究结果有助于阐明旱地红壤中阿特拉津的环境归趋,并为发展适用于红壤的污染物控制技术提供科学依据。
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| 关 键 词： | 阿特拉津 红壤 土壤改良 微生物降解 环境归趋 |
| 收稿时间： | 2022/2/26 0:00:00 |
| 修稿时间： | 2022/3/17 0:00:00 |
Environmental Fate and Regulation of Atrazine in Upland Red Soil Under Different Fertilization Regimes |
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| DONG Panyue,CHEN Yuzhu,ZENG Jun,LIN Xiangui,LUO Yongming,WU Yucheng.Environmental Fate and Regulation of Atrazine in Upland Red Soil Under Different Fertilization Regimes[J].Soils,2022,54(6):1201-1209. |
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| Authors: | DONG Panyue CHEN Yuzhu ZENG Jun LIN Xiangui LUO Yongming WU Yucheng |
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| Institution: | Key Laboratory of Soil Environment and Pollution Remediation,Institute of Soil Science,Chinese Academy of Sciences,Key Laboratory of Soil Environment and Pollution Remediation,Institute of Soil Science,Chinese Academy of Sciences,Key Laboratory of Soil Environment and Pollution Remediation,Institute of Soil Science,Chinese Academy of Sciences,Key Laboratory of Soil Environment and Pollution Remediation,Institute of Soil Science,Chinese Academy of Sciences,Key Laboratory of Soil Environment and Pollution Remediation,Institute of Soil Science,Chinese Academy of Sciences,Key Laboratory of Soil Environment and Pollution Remediation,Institute of Soil Science,Chinese Academy of Sciences |
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| Abstract: | Red soil is an important soil type that widely distributes in southern China. Microbial activity in red soil could be restricted by the low pH and organic matter content, which limits the degradation of organic pollutants. So far the transformation and regulation of atrazine in red soil remain elusive. In this study, upland red soils under different fertilization regimes were collected, and soil microcosms supplemented with lignin or milled oyster shell were established. Isotope tracer and molecular assays were used to evaluate the effects of fertilization and soil amelioration on atrazine mineralization and degrading microbes. The results showed that the accumulative mineralization of atrazine was less than 0.33% in soils fertilized with mineral and farm yard manure fertilizers. Milled oyster shell significantly enhanced the mineralization together with the increase in soil pH and with changing bacterial communities. Meanwhile, atzC and trzN were enriched. In contrast, lignin could not stimulate atrazine mineralization. Instead, lignin considerably increased the formation of nonextractable residues, thus decreased the bioavailability of atrazine. These findings contribute to the environmental fate of atrazine in red soil, and highlight the potential of pollution control by soil amelioration. |
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| Keywords: | atrazine red soil soil amelioration microbial degradation environmental fate |
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