Natural Deterioration Processes of Salix psammophila Sand Barriers in Atmospheric Exposure Section
The atmospheric conditions of desert environments are important for the protection of Sand Barrier, and these conditions can affect and change the structure and performance of the sand barrier, causing them to lose their wind proofing and sand fixing benefits. In this study, we have first examined t...
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Published in | Frontiers in plant science Vol. 13; p. 850391 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Switzerland
Frontiers Media S.A
08.04.2022
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Subjects | |
Online Access | Get full text |
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Summary: | The atmospheric conditions of desert environments are important for the protection of
Sand Barrier, and these conditions can affect and change the structure and performance of the sand barrier, causing them to lose their wind proofing and sand fixing benefits. In this study, we have first examined the key environmental factors that affect the exposure of
sand barrier. Then, we assessed how key factors in the desert atmospheric environment affect structural aging and performance. The relative crystallinity and chemical composition changes in the sand barrier were measured by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS), and the main degradation factors and processes were discussed. The results showed that the degradation degree of the exposed
sand barrier was mainly affected by moisture and ultraviolet radiation. Lignin was the main component and the source of photodegradation and photodiscoloration observed in the sand barrier. However, other polysaccharides, such as cellulose and hemicellulose, were less affected by photodegradation. The stress generated by alternating desorption-absorption was the main cause of the expansion and contraction, deformation, cracking, and warping observed in
sand barrier. We also found a series of irreversible changes and losses that occurred, which affected the natural material properties of
sand barrier exposed to atmospheric conditions for several years. Exposure times between 5 and 7 years were the most important turning point in time for determining the deterioration of the
sand barrier. Our results highlighted the importance of the interactions between atmospheric factors and the exposed atmospheric sections of the
sand barrier from the perspective of environmental effects. However, the exact mechanisms of the sand barrier deterioration still need further investigation. Nevertheless, our overall findings advanced the current understanding of the environmental effects of
sand barrier for ecological restoration and desertification reversal, especially in stressful desert environments. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 Edited by: Miha Humar, University of Ljubljana, Slovenia Reviewed by: Guang-Lei Gao, Beijing Forestry University, China; Boštjan Lesar, University of Ljubljana, Slovenia; Ehsan Bari, Technical and Vocational University, Iran This article was submitted to Functional Plant Ecology, a section of the journal Frontiers in Plant Science |
ISSN: | 1664-462X 1664-462X |
DOI: | 10.3389/fpls.2022.850391 |