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dc.contributor.authorZhang, Yaling
dc.contributor.authorMenke, Carl
dc.contributor.authorDrigo, Barbara
dc.contributor.authorBai, Shahla Hosseini
dc.contributor.authorAnderson, Ian
dc.contributor.authorXu, Zhihong
dc.contributor.authorChen, Hong
dc.contributor.authorZhang, Manyun
dc.description.abstractPurpose: Re-establishment of soil nitrogen (N) capital is a priority in mine rehabilitation. We aimed to evaluate the effects of biochar addition on improving mine spoil N pools and the influence of elevated CO2 concentration on mine rehabilitation. Materials and methods: We assessed the effects of pinewood biochar, produced at three temperatures (650, 750 and 850 °C, referred as B650, B750 and B850, respectively), on mine spoil total N concentrations with five different plant species, including a tree species (Eucalyptus crebra), N-fixing shrubs (Acacia floribunda and Allocasuarina littoralis) and C3 and C4 grasses (Austrodanthonia tenuior and Themeda australis) incubated at ambient (400 μL L−1) and elevated (700 μL L−1) atmospheric CO2 concentrations, as well as the effects of elevated CO2 on mine rehabilitation. Results and discussion: Soil total N significantly improved following biochar incorporation under all plant species (P < 0.05) except for T. Australis. E. crebra had the highest soil total N (0.197%, 0.198% and 0.212% for B650, B750 and B850, respectively). Different from the negligible influence of elevated CO2 on soil properties under the grasses and the N-fixing shrubs, elevated CO2 significantly increased soil water and hot water extractable organic C (WEOC and HWEOC, respectively) and decreased total C under E. crebra, indicating that the nutrient demands were not met. Conclusions: Biochar addition showed the potential in mine rehabilitation in terms of improving soil N pool, especially with E. crebra. However, it would be more difficulty to rehabilitate mine spoils in future with the rising atmospheric CO2 concentration.
dc.relation.ispartofjournalJournal of Soils and Sediments
dc.subject.fieldofresearchEnvironmental Sciences not elsewhere classified
dc.subject.fieldofresearchEarth Sciences
dc.subject.fieldofresearchEnvironmental Sciences
dc.subject.fieldofresearchAgricultural and Veterinary Sciences
dc.titleAssessing the potential of using biochar in mine rehabilitation under elevated atmospheric CO2 concentration
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Sciences, Griffith School of Environment
gro.hasfulltextNo Full Text
gro.griffith.authorXu, Zhihong
gro.griffith.authorHosseini-Bai, Shahla
gro.griffith.authorZhang, Yaling
gro.griffith.authorMenke, Carl
gro.griffith.authorZhang, Manyun

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