Journal article
The effects of short term, long term and reapplication of biochar on soil bacteria
Science of the Total Environment, Vol.636, pp.142-151
15/09/2018
PMID: 29704711
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Abstract
Biochar has been shown to affect soil microbial diversity and abundance. Soil microbes play a key role in soil nutrient cycling, but there is still a dearth of knowledge on the responses of soil microbes to biochar amendments, particularly for longer-term or repeated applications. We sampled soil from a field trial to determine the individual and combined effects of newly applied (1 year ago), re-applied (1 year ago into aged biochar) and aged (9 years ago) biochar amendments on soil bacterial communities, with the aim of identifying the potential underlying mechanisms or consequences of these effects. Soil bacterial diversity and community composition were analysed by sequencing of 16S rRNA using a Miseq platform. This investigation showed that biochar in soil after 1 year significantly increased bacterial diversity and the relative abundance of nitrifiers and bacteria consuming pyrogenic carbon (C). We also found that the reapplication of biochar had no significant effects on soil bacterial communities. Mantel correlation between bacterial diversity and soil chemical properties for four treatments showed that the changes in soil microbial community composition were well explained by soil pH, electrical conductivity (EC), extractable organic C and total extractable nitrogen (N). These results suggested that the effects of biochar amendment on soil bacterial communities were highly time-dependent. Our study highlighted the acclimation of soil bacteria on receiving repeated biochar amendment, leading to similar bacterial diversity and community structure among 9-years old applied biochar, repeated biochar treatments and control.
Details
- Title
- The effects of short term, long term and reapplication of biochar on soil bacteria
- Creators
- Thi Thu Nhan Nguyen - University of the Sunshine CoastHelen M Wallace - University of the Sunshine CoastCheng-Yuan Xu - University of the Sunshine CoastLukas (Van) Zwieten - NSW Department of Primary IndustriesZhe Han Weng - NSW Department of Primary IndustriesZhihong Xu - Griffith UniversityRongxiao Che - Griffith UniversityIman Tahmasbian - NSW Department of Primary IndustriesHang-Wei Hu - University of MelbourneShahla Hosseini Bai - University of the Sunshine Coast
- Publication Details
- Science of the Total Environment, Vol.636, pp.142-151
- Publisher
- Elsevier BV
- Grant note
- This study was supported by Seed Funding from University of the Sunshine Coast (USC/CRN2012/03) and Griffith University (EFC-JRE). TTNN received a scholarship from VIED and University of the Sunshine Coast (MoET-VIED/USC).
- Identifiers
- 991012925094402368
- Copyright
- © 2018 Elsevier B.V. All rights reserved.
- Academic Unit
- Science; Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article