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Impact of Chitosan on the Mechanical Stability of Soils
Chitosan is becoming increasingly applied in agriculture, mostly as a powder, however little is known about its effect on soil mechanical properties. Uniaxial compression test was performed for cylindrical soil aggregates prepared from four soils of various properties (very acidic Podzol, acidic Are...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9000621/ https://www.ncbi.nlm.nih.gov/pubmed/35408671 http://dx.doi.org/10.3390/molecules27072273 |
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author | Adamczuk, Agnieszka Jozefaciuk, Grzegorz |
author_facet | Adamczuk, Agnieszka Jozefaciuk, Grzegorz |
author_sort | Adamczuk, Agnieszka |
collection | PubMed |
description | Chitosan is becoming increasingly applied in agriculture, mostly as a powder, however little is known about its effect on soil mechanical properties. Uniaxial compression test was performed for cylindrical soil aggregates prepared from four soils of various properties (very acidic Podzol, acidic Arenosol, neutral Fluvisol and alkaline Umbrisol) containing different proportions of two kinds of chitosan (CS1 of higher molecular mass and lower deacetylation degree, and CS2 of lower molecular mass and higher deacetylation degree), pretreated with 1 and 10 wetting–drying cycles. In most cases increasing chitosan rates successively decreased the mechanical stability of soils that was accompanied by a tendential increase in soil porosity. In one case (Fluvisol treated with CS2) the porosity decreased and mechanical stability increased with increasing chitosan dose. The behavior of acidic soils (Podzol and Arenosol) treated with CS2, differed from the other soils: after an initial decrease, the strength of aggregates increased with increasing chitosan amendment, despite the porosity consequently decreasing. After 10 wetting–drying cycles, the strength of the aggregates of acidic soils appeared to increase while it decreased for neutral and alkaline soils. Possible mechanisms of soil–chitosan interactions affecting mechanical strength are discussed and linked with soil water stability and wettability. |
format | Online Article Text |
id | pubmed-9000621 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-90006212022-04-12 Impact of Chitosan on the Mechanical Stability of Soils Adamczuk, Agnieszka Jozefaciuk, Grzegorz Molecules Article Chitosan is becoming increasingly applied in agriculture, mostly as a powder, however little is known about its effect on soil mechanical properties. Uniaxial compression test was performed for cylindrical soil aggregates prepared from four soils of various properties (very acidic Podzol, acidic Arenosol, neutral Fluvisol and alkaline Umbrisol) containing different proportions of two kinds of chitosan (CS1 of higher molecular mass and lower deacetylation degree, and CS2 of lower molecular mass and higher deacetylation degree), pretreated with 1 and 10 wetting–drying cycles. In most cases increasing chitosan rates successively decreased the mechanical stability of soils that was accompanied by a tendential increase in soil porosity. In one case (Fluvisol treated with CS2) the porosity decreased and mechanical stability increased with increasing chitosan dose. The behavior of acidic soils (Podzol and Arenosol) treated with CS2, differed from the other soils: after an initial decrease, the strength of aggregates increased with increasing chitosan amendment, despite the porosity consequently decreasing. After 10 wetting–drying cycles, the strength of the aggregates of acidic soils appeared to increase while it decreased for neutral and alkaline soils. Possible mechanisms of soil–chitosan interactions affecting mechanical strength are discussed and linked with soil water stability and wettability. MDPI 2022-03-31 /pmc/articles/PMC9000621/ /pubmed/35408671 http://dx.doi.org/10.3390/molecules27072273 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Adamczuk, Agnieszka Jozefaciuk, Grzegorz Impact of Chitosan on the Mechanical Stability of Soils |
title | Impact of Chitosan on the Mechanical Stability of Soils |
title_full | Impact of Chitosan on the Mechanical Stability of Soils |
title_fullStr | Impact of Chitosan on the Mechanical Stability of Soils |
title_full_unstemmed | Impact of Chitosan on the Mechanical Stability of Soils |
title_short | Impact of Chitosan on the Mechanical Stability of Soils |
title_sort | impact of chitosan on the mechanical stability of soils |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9000621/ https://www.ncbi.nlm.nih.gov/pubmed/35408671 http://dx.doi.org/10.3390/molecules27072273 |
work_keys_str_mv | AT adamczukagnieszka impactofchitosanonthemechanicalstabilityofsoils AT jozefaciukgrzegorz impactofchitosanonthemechanicalstabilityofsoils |