刘志平,解文艳,杨振兴,胡雪纯,马晓楠,周怀平.长期有机/无机肥配施对褐土细菌群落及抗生素抗性基因赋存的影响[J].干旱地区农业研究,2022,40(6):167~174
长期有机/无机肥配施对褐土细菌群落及抗生素抗性基因赋存的影响
Effects of long\|term combination of organic and inorganic fertilizer on bacterial community and antibiotic resistance genes in cinnamon soil
  
DOI:10.7606/j.issn.1000-7601.2022.06.18
中文关键词:  有机/无机肥配施  褐土  宏基因组  细菌群落  抗生素抗性基因
英文关键词:combination of organic and inorganic fertilizer  cinnamon soil  metagenomic  bacterial community  antibiotic resistance gene
基金项目:山西省青年科技研究基金(201901D211557);山西省农业科学院博士研究基金(YBSJJ2012);山西农业大学省部共建有机旱作农业国家重点实验室自主研发项目(202001-7)
作者单位
刘志平 山西农业大学资源环境学院省部共建有机旱作农业国家重点实验室(筹)山西 太原 030001 
解文艳 山西农业大学资源环境学院省部共建有机旱作农业国家重点实验室(筹)山西 太原 030001 
杨振兴 山西农业大学资源环境学院省部共建有机旱作农业国家重点实验室(筹)山西 太原 030001 
胡雪纯 山西农业大学资源环境学院省部共建有机旱作农业国家重点实验室(筹)山西 太原 030001 
马晓楠 山西农业大学资源环境学院省部共建有机旱作农业国家重点实验室(筹)山西 太原 030001 
周怀平 山西农业大学资源环境学院省部共建有机旱作农业国家重点实验室(筹)山西 太原 030001 
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中文摘要:
      为探明长期有机/无机肥配施对土壤细菌及抗生素抗性基因多样性的影响,以山西寿阳褐土长期定位试验为依托,采集5个有机/无机肥配施处理(N0P0M0,N2P1M1,N4P2M2,N3P2M3和N0P0M6)0~20 cm土层土壤样品,采用宏基因组测序技术研究有机/无机肥配施条件下褐土中细菌群落和抗生素抗性基因的差异。结果表明:长期有机/无机肥配施显著改变了土壤细菌及抗生素抗性基因的多样性,细菌优势门为变形菌门、酸杆菌门、放线菌门、芽单胞菌门和绿弯菌门。不同处理土壤共同抗性基因亚型有256个,土壤特有抗生素抗性基因亚型随施肥量的增加均呈现先增加后降低的趋势,且在N3P2M3处理中达到最高。土壤中丰度较高的抗生素抗性基因种类有大环内酯类、多药类、万古霉素类、四环素类、氯霉素类,其中含量最高的抗性基因亚型为MacB、BcrA、MexW、MexF和pbp1a。皮尔森相关性分析表明:土壤理化性质直接或间接地影响着细菌群落及ARGs的组成和变异,冗余分析进一步表明,抗生素抗性基因的变化受细菌群落结构的影响。抗生素抗性基因已经成为威胁人类健康的潜在污染物,农业生产中施用畜禽粪污时应充分腐熟并与化肥配合施用,以保障生态环境安全。
英文摘要:
      To explore the effects of long\|term organic and inorganic fertilizer combined application on soil bacterial and antibiotic resistance gene diversity, 0~20 cm layer soil of five organic and inorganic fertilizer combined application treatments (N0P0M0, N2P1M1,N4P2M2, N3P2M3 and N0P0M6) were collected based on the long\|term location test of cinnamon soil in Shouyang, Shanxi Province. Metagenomic sequencing technology was applied to study the difference of bacterial community and antibiotic resistance genes in cinnamon soil under combined organic/inorganic fertilizer conditions. Results showed that the diversity of bacteria and antibiotic resistance genes in soil was significantly changed by long\|term organic/inorganic fertilizer combination. The dominant bacteria phyla were Proteobacteria, Acidobacteria, Actinobacteria, Gemmatimonadetes and Chloroflexi. There were 256 soil common resistance gene subtypes in different treatments. Soil specific antibiotic resistance gene subtypes increased at first and then decreased with the increase of fertilizer application amount, reaching the highest in N3P2M3 treatment. The antibiotic resistance genes with high abundance in soil were macrolides, multidrugs, vancomycin, tetracycline and chloramphenicol. Among them, the resistance gene subtypes with the highest content were MacB, BcrA, MexW, MexF and pbp1a. Pearson correlation analysis showed that soil physical and chemical properties directly or indirectly affected the composition and variation of bacterial community and ARGs. Redundancy analysis further showed that the changes of antibiotic resistance genes were affected by bacterial community structure. Antibiotic resistance genes have become potential pollutants threatening human health. Livestock and poultry manure should be fully decomposed and combined with chemical fertilizer in agricultural production to ensure ecological environment safety.
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