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

Environmental Science and Pollution Research International
Yaling ZhangZhihong Xu

Abstract

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 th...Continue Reading

References

Nov 10, 2006·Trends in Plant Science·Christian HermansNathalie Verbruggen
Nov 20, 2008·Journal of Integrative Plant Biology·Daniel R Taub, Xianzhong Wang
Apr 30, 2009·Journal of Experimental Botany·Andrew D B LeakeyDonald R Ort
Jul 4, 2012·Journal of Environmental Quality·Amir HassDouglas G Boyer
May 16, 2013·Journal of Environmental Quality·A O'TooleD P Rasse

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Citations

Aug 9, 2020·Frontiers in Plant Science·Birendra K PadhanViswanathan Chinnusamy
Oct 4, 2020·Environmental Science and Pollution Research International·Leila AsadyarShahla Hosseini Bai

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