干旱区生态环境知识资源中心(Arid): Reducing water use by alternate-furrow irrigation with livestock wastewater reduces antibiotic resistance gene abundance in the rhizosphere but not in the non-rhizosphere

Arid

DOI	10.1016/j.scitotenv.2018.08.101
	Reducing water use by alternate-furrow irrigation with livestock wastewater reduces antibiotic resistance gene abundance in the rhizosphere but not in the non-rhizosphere
	Liu, Yuan 1; Cui, Erping 1; Neal, Andrew L.2; Zhang, Xiaoxian 2; Li, Zhongyang 1; Xiao, Yatao 1; Du, Zhenjie 1; Gao, Feng 1; Fan, Xiangyang 1; Hu, Chao 1
通讯作者	Li, Zhongyang
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2019
卷号	648 页码:12-24
英文摘要	Livestock wastewater is rich in nutrients but may contain antibiotics and antibiotic resistance genes (ARGs). Their discharge to watercourses or soil may result in proliferation of ARGs. Irrigation with wastewater appears to be the most feasible option of disposing of it. One efficient irrigation technology used in arid regions is alternate-furrow irrigation (AFI) by alternately drying part of the plant roots for a prolonged period to physiologically reduce transpiration without compromising yield. However, the extent to which AFI with wastewater influences the concentration of antibiotics and spread of ARGs in soil is poorly understood. The purpose of this paper is to investigate how AFI using swine wastewater alters antibiotic kinetics and ARGs abundance under different irrigation rates, using pepper as the model plant. We examined three AFI treatments using 50%, 65% and 80% of the amount of water employed in sufficient conventional furrow irrigation. Each treatment had a groundwater irrigation control. The results showed that antibiotic concentrations and relative ARGs abundance in the top 20 cm of soil did not increase with the irrigation amount, although they were higher than those in the groundwater-irrigated soils. The relative ARGs abundance in the soil was modulated by irrigation amount and reducing the irrigation amount in AFI reduced ARGs dispersion only in rhizosphere. When the soil moisture was close to field capacity, ARGs were more abundant in rhizosphere than in non-rhizosphere, possibly because the rhizosphere is rich in microbes and increasing antibiotic concentrations due to an increase in irrigation rate favors antibiotic-resistant microbiome in competing for substrates. These, however, were not mirrored in the relative ARGs abundance in the roots. These results have important implications as it revealed that reducing the input of antibiotics and ARGs into soil with AFI does not necessarily reduce ARGs proliferation. (C) 2018 The Authors. Published by Elsevier B.V.
英文关键词	livestock wastewater Alternate-furrow irrigation Irrigation amount Antibiotics resistance Water quality
类型	Article
语种	英语
国家	Peoples R China ; England
开放获取类型	Green Published, hybrid
收录类别	SCI-E
WOS记录号	WOS:000447805500002
WOS关键词	CARE PRODUCTS PPCPS ; ROOT-ZONE IRRIGATION ; CLASS 1 INTEGRON ; SANDY LOAM SOIL ; USE EFFICIENCY ; MICROBIAL COMMUNITY ; BACTERIAL-RESISTANCE ; AGRICULTURAL SOILS ; LAND APPLICATION ; MAIZE ROTATIONS
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218588
作者单位	1.Chinese Acad Agr Sci, Farmland Irrigat Res Inst, Xinxiang 453002, Peoples R China; 2.Rothamsted Res, Dept Sustainable Agr Sci, Harpenden AL5 2JQ, Herts, England
推荐引用方式 GB/T 7714	Liu, Yuan,Cui, Erping,Neal, Andrew L.,et al. Reducing water use by alternate-furrow irrigation with livestock wastewater reduces antibiotic resistance gene abundance in the rhizosphere but not in the non-rhizosphere[J],2019,648:12-24.
APA	Liu, Yuan.,Cui, Erping.,Neal, Andrew L..,Zhang, Xiaoxian.,Li, Zhongyang.,...&Hu, Chao.(2019).Reducing water use by alternate-furrow irrigation with livestock wastewater reduces antibiotic resistance gene abundance in the rhizosphere but not in the non-rhizosphere.SCIENCE OF THE TOTAL ENVIRONMENT,648,12-24.
MLA	Liu, Yuan,et al."Reducing water use by alternate-furrow irrigation with livestock wastewater reduces antibiotic resistance gene abundance in the rhizosphere but not in the non-rhizosphere".SCIENCE OF THE TOTAL ENVIRONMENT 648(2019):12-24.