Linking potential nitrification rates, nitrogen cycling genes and soil properties after remediating the agricultural soil contaminated with heavy metal and fungicide

Manyun Zhang; Shahla Hosseini Bai; Li Tang; Yaling Zhang; Ying Teng; Zhihong Xu

doi:10.1016/j.chemosphere.2017.06.081

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Linking potential nitrification rates, nitrogen cycling genes and soil properties after remediating the agricultural soil contaminated with heavy metal and fungicide

Journal article

Open access

Peer reviewed

Linking potential nitrification rates, nitrogen cycling genes and soil properties after remediating the agricultural soil contaminated with heavy metal and fungicide

Manyun Zhang, Shahla Hosseini Bai, Li Tang, Yaling Zhang, Ying Teng and Zhihong Xu

Chemosphere, Vol.184, pp.892-899

2017

DOI: https://doi.org/10.1016/j.chemosphere.2017.06.081

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Abstract

potential nitrification rate

medicago sativa L.

biochar

soil co-contamination

functional gene abundance

Apart from the contaminant removal, the remediation of agricultural soil should also pay more attention to soil nutrient retention and biogeochemical cycling. This study aimed to evaluate changes of soil properties, potential nitrification rates (PNRs), and functional gene abundances and link their relationships after remediating co-contaminated agricultural soil with Medicago sativa L. (alfalfa) planting, alone or together with biochar application. Compared with the control (CK), alfalfa planting, alone or together with biochar application, could significantly increase soil organic matter (SOM) contents and discrepantly affect soil pH values. The PNRs of the amended treatments were significantly higher than that of the CK. Moreover, alfalfa plantings also enhanced the abundances of functional genes related to soil nitrification and denitrification, with the sole exception of nosZ gene. Stepwise regression analysis revealed that the PNRs were best described by the gene abundance ratios of AOB amoA/nifH and nirS gene abundances. Compared with the CK, alfalfa planting, alone or with biochar application, could restore nitrogen cycling in the co-contaminated agricultural soil and enhance the PNRs via decreasing contaminant bio-availabilities and increasing SOM contents and gene abundance ratios of AOB amoA/nifH.

Details

Title: Linking potential nitrification rates, nitrogen cycling genes and soil properties after remediating the agricultural soil contaminated with heavy metal and fungicide
Authors: Manyun Zhang (Author) - Griffith University
Shahla Hosseini Bai (Author) - Griffith University
Li Tang (Author) - Griffith University
Yaling Zhang (Author) - Griffith University
Ying Teng (Author) - Chinese Academy of Sciences, China
Zhihong Xu (Author) - Griffith University
Publication details: Chemosphere, Vol.184, pp.892-899
Publisher: Pergamon
Date published: 2017
DOI: 10.1016/j.chemosphere.2017.06.081
ISSN: 0045-6535
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99451158902621
Output Type: Journal article

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