TY - JOUR

T1 - Organic Matter Structural Composition of Vascular Epiphytic Suspended Soils of South Vietnam

AU - Абакумов, Евгений Васильевич

AU - Еськов , Ален Кямалович

N1 - Abakumov, E.; Eskov, A. Organic Matter Structural Composition of Vascular Epiphytic Suspended Soils of South Vietnam. Appl. Sci. 2023, 13, 4473. https:// doi.org/10.3390/app13074473

PY - 2023/3/31

Y1 - 2023/3/31

N2 - The biosphere organic matter is stored in nature in various forms. Most of it is associated with classical terrestrial organo-mineral soils. The carbon of woody plant biomass is counted separately from soil as carbon of the standing biomass. Nevertheless, humification as a universal processalready begins in plant residues before they reach the surface of the classical tropical mineral soil. Moreover, in tropical humid-forest ecosystems, most of the organic matter does not reach the soil surface at all and accumulates in the state of suspended soils. The data obtained in this study characterize, for the first time, the component and structural composition of the organic matter of plantresidues of suspended soils, as well as the products of their transformation—humic substances formed in suspended soils. With the use of micro morphological methods, it was shown that humification appears in merged areas of organic remnants. There were statistically significant differencesin the elemental composition of humic acids and initial organic material for all elements—C, H, O and N. It has been shown that the aliphatic part dominates (75–93%) in the initial organic materials of suspended soils, whereas the humic substances are characterized by a relatively increased fraction of aromatic fragments (31–42%) in the composition of their molecules, which confirms that humification takes place. Thus, even in the suspended soils, classical humification occurs, and this is not limited by the low content of mineral particles and cations in the suspended soils and the ratheracidic reaction of the material. Therefore, the existence of tiering and the formation of the corresponding layers of suspended soils is accompanied by the stabilization and humification of organic matter, which is accompanied by a radical change in its structural and component composition. Thisprocess is the “natural biotechnology” of organic matter conservation and stabilization is discussedin article.

AB - The biosphere organic matter is stored in nature in various forms. Most of it is associated with classical terrestrial organo-mineral soils. The carbon of woody plant biomass is counted separately from soil as carbon of the standing biomass. Nevertheless, humification as a universal processalready begins in plant residues before they reach the surface of the classical tropical mineral soil. Moreover, in tropical humid-forest ecosystems, most of the organic matter does not reach the soil surface at all and accumulates in the state of suspended soils. The data obtained in this study characterize, for the first time, the component and structural composition of the organic matter of plantresidues of suspended soils, as well as the products of their transformation—humic substances formed in suspended soils. With the use of micro morphological methods, it was shown that humification appears in merged areas of organic remnants. There were statistically significant differencesin the elemental composition of humic acids and initial organic material for all elements—C, H, O and N. It has been shown that the aliphatic part dominates (75–93%) in the initial organic materials of suspended soils, whereas the humic substances are characterized by a relatively increased fraction of aromatic fragments (31–42%) in the composition of their molecules, which confirms that humification takes place. Thus, even in the suspended soils, classical humification occurs, and this is not limited by the low content of mineral particles and cations in the suspended soils and the ratheracidic reaction of the material. Therefore, the existence of tiering and the formation of the corresponding layers of suspended soils is accompanied by the stabilization and humification of organic matter, which is accompanied by a radical change in its structural and component composition. Thisprocess is the “natural biotechnology” of organic matter conservation and stabilization is discussedin article.

KW - suspended soils

KW - vascular epiphytes

KW - South Vietnam

KW - humification

KW - 13-C NMR spectroscopy

KW - 13-C NMR spectroscopy

KW - South Vietnam

KW - humification

KW - suspended soils

KW - vascular epiphytes

UR - https://www.mendeley.com/catalogue/7cc52435-208c-32d8-a801-9af72440c1c0/

U2 - 10.3390/app13074473

DO - 10.3390/app13074473

M3 - Article

VL - 13

JO - Applied Sciences (Switzerland)

JF - Applied Sciences (Switzerland)

SN - 2076-3417

IS - 7

M1 - 4473

ER -