Applications of X-Ray Computed Tomography for Examining Soil Structure: A Review

Calistru, Anca Elena; Jităreanu, G.

doi:10.15835/buasvmcn-agr:11145

Cited by 5 publications

(3 citation statements)

References 58 publications

(32 reference statements)

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“…However, access to X-ray beams at various synchrotron facilities, and especially the availability of table-top X-ray CT scanners, have allowed the work in this area to experience a quantum leap around the turn of the century. The new technology has made it possible to obtain 3D images of the pore space in intact soil cores much more rapidly, and at resolutions that have gradually improved over time ( Mooney, 2002 ; Rozenbaum et al, 2012 ; Bouckaert et al, 2013a ; Calistru and Jitareanu, 2015 ; Rabot et al, 2015 ).…”

Section: Progress On the Physical Frontmentioning

confidence: 99%

“…In the last few years, the application of each of these technologies and modeling methods to soils has been the object of a sizeable literature. Progress achieved in the use of each technology has already been expertly reviewed ( O’Donnell et al, 2007 ; Taina et al, 2008 ; Young et al, 2008 ; Behrens et al, 2012 ; Rennert et al, 2012 ; Helliwell et al, 2013 ; Tuller et al, 2013 ; Wildenschild and Sheppard, 2013 ; Schlüter et al, 2014 ; Calistru and Jitareanu, 2015 ; Kuzyakov and Blagodatskaya, 2015 ; Prosser, 2015 ; Roose et al, 2016 ; Xiong et al, 2016 ; Totsche et al, 2017 ). For some technologies, since advances are extremely rapid, it would be useful, conceivably, to provide an updated coverage of recent work, and no doubt new reviews will fill the gaps in the near future.…”

Section: Introductionmentioning

confidence: 99%

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Emergent Properties of Microbial Activity in Heterogeneous Soil Microenvironments: Different Research Approaches Are Slowly Converging, Yet Major Challenges Remain

et al. 2018

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Over the last 60 years, soil microbiologists have accumulated a wealth of experimental data showing that the bulk, macroscopic parameters (e.g., granulometry, pH, soil organic matter, and biomass contents) commonly used to characterize soils provide insufficient information to describe quantitatively the activity of soil microorganisms and some of its outcomes, like the emission of greenhouse gasses. Clearly, new, more appropriate macroscopic parameters are needed, which reflect better the spatial heterogeneity of soils at the microscale (i.e., the pore scale) that is commensurate with the habitat of many microorganisms. For a long time, spectroscopic and microscopic tools were lacking to quantify processes at that scale, but major technological advances over the last 15 years have made suitable equipment available to researchers. In this context, the objective of the present article is to review progress achieved to date in the significant research program that has ensued. This program can be rationalized as a sequence of steps, namely the quantification and modeling of the physical-, (bio)chemical-, and microbiological properties of soils, the integration of these different perspectives into a unified theory, its upscaling to the macroscopic scale, and, eventually, the development of new approaches to measure macroscopic soil characteristics. At this stage, significant progress has been achieved on the physical front, and to a lesser extent on the (bio)chemical one as well, both in terms of experiments and modeling. With regard to the microbial aspects, although a lot of work has been devoted to the modeling of bacterial and fungal activity in soils at the pore scale, the appropriateness of model assumptions cannot be readily assessed because of the scarcity of relevant experimental data. For significant progress to be made, it is crucial to make sure that research on the microbial components of soil systems does not keep lagging behind the work on the physical and (bio)chemical characteristics. Concerning the subsequent steps in the program, very little integration of the various disciplinary perspectives has occurred so far, and, as a result, researchers have not yet been able to tackle the scaling up to the macroscopic level. Many challenges, some of them daunting, remain on the path ahead. Fortunately, a number of these challenges may be resolved by brand new measuring equipment that will become commercially available in the very near future.

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Section: Progress On the Physical Frontmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Emergent Properties of Microbial Activity in Heterogeneous Soil Microenvironments: Different Research Approaches Are Slowly Converging, Yet Major Challenges Remain

et al. 2018

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“…Additionally, wheat flour millers usually refuse grains infected by T. foetida, as very low infection rates can result in obvious unwanted odors in flour [3,4]. The disease incidence can reach 70 to 80% using T. foetida-susceptible seeds, with 41% yield loss in Romania [5] and losses reaching 25-30% and 10-20% in Iran and Turkey, respectively [6].…”

Section: Introductionmentioning

confidence: 99%

Effects of Tilletia foetida on Microbial Communities in the Rhizosphere Soil of Wheat Seeds Coated with Different Concentrations of Jianzhuang

Din

Zhang

et al. 2021

Microb Ecol

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Tilletia foetida (syn. T. laevis) leads to wheat common bunt, a worldwide disease that can lead to 80% yield loss and even total loss of production, together with degrading the quality of grains and flour by producing a rotten fish smell. To explore the potential microbial community that may contribute to the control of soil- and seed-borne pathogens, in this study, we analyzed the effects of the plant pathogenic fungus T. foetida on rhizosphere soil microorganisms in wheat seeds coated with different concentrations of a fungicide (Jianzhuang) used to control the disease. To analyze the bacterial and fungal abundance in T. foetida-infected and mock-infected plants, the microorganisms were sequenced using high-throughput HiSeq 2500 gene sequencing. The results showed that bacterial communities, including Verrucomicrobia, Patescibacteria, Armatimonadetes, Nitrospirae, Fibrobacteres, Chlamydiae, and Hydrogenedentes, and fungal communities, including Basidiomycota and Ciliophora, were more prevalent in the mock group than in the T. foetida-infected group, which may contribute to the control of wheat common bunt. Moreover, cluster and PCoA analysis revealed that replicates of the same samples were clustered together, and these results were also found in the distance index within-group analysis for bacterial and fungal communities in the T. foetida-infected and mock groups.

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Quantification of macropores of Malan loess and the hydraulic significance on slope stability by X-ray computed tomography

Zhang

et al. 2019

Environ Earth Sci

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Applications of X-Ray Computed Tomography for Examining Soil Structure: A Review

Cited by 5 publications

References 58 publications

Emergent Properties of Microbial Activity in Heterogeneous Soil Microenvironments: Different Research Approaches Are Slowly Converging, Yet Major Challenges Remain

Emergent Properties of Microbial Activity in Heterogeneous Soil Microenvironments: Different Research Approaches Are Slowly Converging, Yet Major Challenges Remain

Effects of Tilletia foetida on Microbial Communities in the Rhizosphere Soil of Wheat Seeds Coated with Different Concentrations of Jianzhuang

Quantification of macropores of Malan loess and the hydraulic significance on slope stability by X-ray computed tomography

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