Interactive effects of biochar addition and elevated carbon dioxide concentration on soil carbon and nitrogen pools in mine spoil

Y Zhang; H Chen; Shahla Hosseini Bai; C Menke; M Zhang; Z H Xu

doi:10.1007/s11368-017-1757-6

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Interactive effects of biochar addition and elevated carbon dioxide concentration on soil carbon and nitrogen pools in mine spoil

Journal article

Peer reviewed

Interactive effects of biochar addition and elevated carbon dioxide concentration on soil carbon and nitrogen pools in mine spoil

Y Zhang, H Chen, Shahla Hosseini Bai, C Menke, M Zhang and Z H Xu

Journal of Soils and Sediments, Vol.17(10), pp.2400-2409

2017

DOI: https://doi.org/10.1007/s11368-017-1757-6

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Abstract

biochar addition

elevated atmospheric CO2

δ13C and δ15N

N depletion

soil C storage

soil N retention

Purpose: This study aimed to assess the effects of biochar on improving nitrogen (N) pools in mine spoil and examine the effects of elevated CO2 on soil carbon (C) storage. Materials and methods: The experiment consisted of three plant species (Austrostipa ramossissima, Dichelachne micrantha, and Lomandra longifolia) planted in the N-poor mine spoil with application of biochar produced at three temperatures (650, 750, and 850 °C) under both ambient (400 μL L-1) and elevated (700 μL L-1) CO2. We assessed mine spoil total C and N concentrations and stable C and N isotope compositions (δ13C and δ15N), as well as hot water extractable organic C (HWEOC) and total N (HWETN) concentrations. Results and discussion: Soil total N significantly increased following biochar application across all species. Elevated CO2 induced soil C loss for A. ramossissima and D. micrantha without biochar application and D. micrantha with the application of biochar produced at 750 °C. In contrast, elevated CO2 exhibited no significant effect on soil total C for A. littoralis, D. micrantha, or L. longifolia under any other biochar treatments. Conclusions: Biochar application is a promising means to improve N retention and thus, reduce environmentally harmful N fluxes in mine spoil. However, elevated CO2 exhibited no significant effects on increasing soil total C, which indicated that mine spoil has limited potential to store rising atmospheric CO2.

Details

Title: Interactive effects of biochar addition and elevated carbon dioxide concentration on soil carbon and nitrogen pools in mine spoil
Authors: Y Zhang (Author) - Griffith University
H Chen (Author) - Griffith University
Shahla Hosseini Bai (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
C Menke (Author) - Griffith University
M Zhang (Author) - Griffith University
Z H Xu (Author) - Griffith University
Publication details: Journal of Soils and Sediments, Vol.17(10), pp.2400-2409
Publisher: Springer
Date published: 2017
DOI: 10.1007/s11368-017-1757-6
ISSN: 1439-0108
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99451302902621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Environmental Sciences; Soil Science

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