Biochar addition induced the same plant responses as elevated CO2 in mine spoil
Author(s)
Zhang, Yaling
Drigo, Barbara
Bai, Shahla Hosseini
Menke, Carl
Zhang, Manyun
Xu, Zhihong
Griffith University Author(s)
Year published
2018
Metadata
Show full item recordAbstract
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 ...
View more >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.
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View more >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.
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Journal Title
Environmental Science and Pollution Research
Volume
25
Issue
2
Subject
Biological Sciences not elsewhere classified
Chemical Sciences
Environmental Sciences
Biological Sciences