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Mathias Neumann Andersen

Effects of reclaimed water irrigation on microbial diversity and composition of soil with reducing nitrogen fertilization

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DOI

  • Guo Wei, Chinese Academy of Agricultural Sciences, Key Laboratory of High-efficient and Safe Utilization of Agriculture Water Resources of CAAS, China
  • Xuebin Qi, Chinese Academy of Agricultural Sciences, China
  • Yatao Xiao, Chinese Academy of Agricultural Sciences, Graduate University of Chinese Academy of Agricultural Sciences
  • ,
  • Ping Li, China Agricultural University, Natl Ctr Nanosci & Technol NCNST, Chinese Academy of Sciences, National Center for Nanoscience & Technology - China, China
  • Mathias Neumann Andersen
  • Yan Zhang, Chinese Academy of Agricultural Sciences, Key Laboratory of High-efficient and Safe Utilization of Agriculture Water Resources of CAAS
  • ,
  • Zhijuan Zhao, Chinese Academy of Agricultural Sciences, Key Laboratory of High-efficient and Safe Utilization of Agriculture Water Resources of CAAS
Reclaimed water (RW) is an alternative water resource that has been utilized all over the world, but its environmental effects are not fully understood. Soil biodiversity is an important indicator of soil tolerance and resilience. In the present study, the impact of RW irrigation on the microbial community diversity and chemical properties of topsoil was investigated by monitoring nitrogen (N) rates. Tomato plants were grown on plots which had been irrigated with reclaimed water for 5 years with varying levels of N fertilization (N270, 270 kg ha−1; N216, 216 kg ha−1; N189, 189 kg ha−1; and N135, 135 kg ha−1). Soil bacterial community composition was analyzed by PCR amplification of the 16S rDNA gene and Illumina MiSeq high-throughput sequencing technology of a total of 770,066 quality sequences. The results showed that long-term RW irrigation altered the bacterial composition of soil in an N-dependent manner. RW irrigation increased the abundances of Gemmatimonadetes, Actinobacteria, Firmicutes, and Nitrospirae in soils. The Chao, ACE, and H indices revealed no significant difference under RW irrigation with varying levels of N fertilization. The tomato yield and partial factor productivity from applied N for RN216 increased significantly under RW irrigation with reducing N fertilization. RW irrigation increased the yield of tomato and the abundance of functional microorganisms, which eventually improved the practice of irrigating with reclaimed municipal wastewater. Meanwhile, the potential environmental and health risks of long-term RW irrigation warrant further investigation.
Original languageEnglish
Article number365
JournalWater
Volume10
Issue4
Pages (from-to)1-16
Number of pages16
ISSN2073-4441
DOIs
Publication statusPublished - 2018

    Research areas

  • reclaimed water, nitrogen fertilization, mibrobial community, bacterial diversity, high throughput sequencing

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