Oil mallee biochar improves soil structural properties—A study with x-ray micro-CT

Quin, Peter; Cowie, Annette; Flavel, Richard J.; Keen, B.; Macdonald, Lynne M.; Morris, Stephen; Singh, Balwant; Young, Iain M.; Zwieten, Lukas Van

doi:10.1016/j.agee.2014.03.022

Cited by 106 publications

(62 citation statements)

References 43 publications

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“…The ferralsol in our study system is chemically active and can rapidly bind with biochar to form relatively stable micro-aggregates (Joseph et al, 2010;Quin et al, 2014). The acidity of the ferralsol may also encourage organo-mineral interactions through ligand exchange reactions, which generally occur between hydroxyl groups and at the edges of carboxyl groups of organic matter (Fang et al, 2014).…”

Section: Q4mentioning

confidence: 98%

“…Hence the unamended soil was repacked to approximately the same field bulk density of 1.01 g cm À3 . The bulk density of biochar was determined to be 0.331 g cm À1 using method described in Quin et al (2014). The weight of soil/biochar mixture in the top 100 mm profile was then calculated based on the bulk density of biochar and soil at 3% w/w mixing ratio.…”

Section: Field Set-upmentioning

confidence: 99%

“…A 150 mm height PVC cap (i.e. static chamber) with septum port was used to collect soil gas fluxes (described in van Zwieten et al, 2014). The soil plus root respiration collars (Fig.…”

Section: Field Set-upmentioning

confidence: 99%

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Plant-biochar interactions drive the negative priming of soil organic carbon in an annual ryegrass field system

Weng

Zwieten

Singh

et al. 2015

Soil Biology and Biochemistry

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Section: Q4mentioning

confidence: 98%

Section: Field Set-upmentioning

confidence: 99%

See 1 more Smart Citation

Plant-biochar interactions drive the negative priming of soil organic carbon in an annual ryegrass field system

Weng

Zwieten

Singh

et al. 2015

Soil Biology and Biochemistry

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“…Petersen et al (2016) found that biochar converted drainable pores (60-300 µm) into water-retaining pores (0.2-60 µm). Quin et al (2014) found that application of oil mallee (Eucalyptus spp.) biochar at 5% increased soil porosity and induced homogeneity in pore size distribution.…”

Section: Soil Pore Size Distributionmentioning

confidence: 99%

Biochar and Soil Physical Properties

Blanco‐Canqui

2017

Soil Science Society of America Journal

696

374

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Biochar is considered to be a potential soil amendment. However, its implications for soil physical and hydraulic properties have not been widely discussed. Changes in the soil physical environment influence the numerous services that soils provide. This paper (i) reviewed the impacts of biochar on soil compaction, mechanical, structural, hydraulic, and thermal properties; (ii) discussed factors affecting biochar performance; and (iii) identified research areas. Biochar generally reduces soil bulk density by 3 to 31%, increases porosity by 14 to 64%, and has limited or no effects on penetration resistance. Biochar increases wet aggregate stability by 3 to 226%, improves soil consistency, and has mixed effects on dry soil aggregate stability. It increases available water by 4 to 130%. Saturated hydraulic conductivity decreases in coarse-textured soils, and increases in fine-textured soils following biochar application. Studies on other properties are few but suggest that biochar reduces tensile strength and particle density, alters water infiltration, moderates soil thermal properties, and has minimal effect on soil water repellency. Sandy soils appear to respond more to biochar than clayey soils. Biochar effectiveness increases as the amount of biochar applied increases. A decrease in biochar particle size can increase water retention but may reduce saturated flow. Field-scale and long-term studies assessing all soil physical properties under different scenarios of biochar management are needed. Overall, biochar generally improves the soil physical environment, but long-term field studies are lacking to conclusively ascertain the extent of biochar effects.Abbreviations: COLE, coefficient of linear extensibility; WDPT, water drop penetration test

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“…For example, evidence exists that biochar changes soil physical properties (e.g. gas diffusivity, water retention) (Quin et al 2014), soil chemical properties (e.g. pH, Eh, availability of organic and mineral N and dissolved organic C (Singh et al 2010a), and soil biological properties (e.g.…”

Section: Uncertainty Of Production Gainsmentioning

confidence: 99%

Opportunities and constraints for biochar technology in Australian agriculture: looking beyond carbon sequestration

et al. 2014

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Abstract. The application of biochar technology for soil amendment is largely based on evidence about soil fertility and crop productivity gains made in the Amazonian Black Earth (terra preta). However, the uncertainty of production gains at realistic application rates of biochars and lack of knowledge about other benefits and other concerns may have resulted in poor uptake of biochar technology in Australia so far. In this review, we identify important opportunities as well as challenges in the adoption of biochar technology for broadacre farming and other sectors in Australia. The paper highlights that for biochar technology to be cost-effective and successful, we need to look beyond carbon sequestration and explore other opportunities to value-add to biochar. Therefore, some emerging and novel applications of biochar are identified. We also suggest some priority research areas that need immediate attention in order to realise the full potential of biochar technology in agriculture and other sectors in Australia.

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Oil mallee biochar improves soil structural properties—A study with x-ray micro-CT

Cited by 106 publications

References 43 publications

Plant-biochar interactions drive the negative priming of soil organic carbon in an annual ryegrass field system

Plant-biochar interactions drive the negative priming of soil organic carbon in an annual ryegrass field system

Biochar and Soil Physical Properties

Opportunities and constraints for biochar technology in Australian agriculture: looking beyond carbon sequestration

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