Biochar addition induced the same plant physiological responses as elevated CO2 in mine spoil

Yaling Zhang; Barbara Drigo; Shahla Hosseini Bai; Carl Menke; Manyun Zhang; Zhihong Xu

doi:10.1007/s11356-017-0574-1

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Biochar addition induced the same plant physiological responses as elevated CO2 in mine spoil

Journal article

Peer reviewed

Biochar addition induced the same plant physiological responses as elevated CO2 in mine spoil

Yaling Zhang, Barbara Drigo, Shahla Hosseini Bai, Carl Menke, Manyun Zhang and Zhihong Xu

Environmental Science and Pollution Research, Vol.25(2), pp.1460-1469

2018

DOI: https://doi.org/10.1007/s11356-017-0574-1

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Abstract

biochar application

elevated atmospheric CO2

leaf C and N

leaf δ13C and δ15N

nitrogen use efficiency

plant biomass

Nitrogen (N) limitation is one of the major constrain factors for biochar in improving plant growth, the same for elevated atmospheric carbon dioxide (CO2). Hence, we hypothesized that (1) biochar would induce the same plant responses as elevated CO2 under N-poor conditions; (2) elevated CO2 would decrease the potential of biochar application in improving plant growth. To test these hypotheses, we assessed the effects of pinewood biochar, produced at three pyrolytic temperatures (650, 750 and 850 °C), on C and N allocation at the whole-plant level of three plant species (Austrostipa ramossissima, Dichelachne micrantha and Isolepis nodosa) grown in the N poor mine spoil under both ambient (400 μL L-1) and elevated (700 μL L-1) CO2 concentrations. Our data showed that biochar addition (1) significantly decreased leaf total N and δ15N (P < 0.05); (2) decreased leaf total N and δ15N more pronouncedly than those of root; and (3) showed more pronounced effects on improving plant biomass under ambient CO2 than under elevated CO2 concentration. Hence, it remained a strong possibility that biochar addition induced the same plant physiological responses as elevated CO2 in the N-deficient mine spoil. As expected, elevated CO2 decreased the ability of biochar addition in improving plant growth.

Details

Title: Biochar addition induced the same plant physiological responses as elevated CO2 in mine spoil
Authors: Yaling Zhang (Author) - Griffith University
Barbara Drigo (Author) - University of South Australia
Shahla Hosseini Bai (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Carl Menke (Author) - Griffith University
Manyun Zhang (Author) - Griffith University
Zhihong Xu (Author) - Griffith University
Publication details: Environmental Science and Pollution Research, Vol.25(2), pp.1460-1469
Publisher: Springer
Date published: 2018
DOI: 10.1007/s11356-017-0574-1
ISSN: 0944-1344
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99451084902621
Output Type: Journal article

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