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Tissues of Angiospermae (deciduous arborous and herbaceous plants) were found to take part in the formation of humus in the agrogray soils. The proportions of lignic phenol contents between the soils did not change neither upon their plowing, no their drainage. Within the catenas studied, the maximal accumulation of phenol compounds takes place in the soils of the mesodepressions with long-term reduction conditions and in the soils of the microdepressions with spring perched water on two levels. In the Fe-Mn nodules of the agrogray soils, lignin of higher plants was found. Its fractional composition was correlated with the predominant vegetation. With the increasing size of the nodules, the amount of products of lignin oxidation in the nodules decreased due to its mineralization. Drainage caused a deep transformation of lignin in the Fe-Mn nodules, especially in the coarse fractions of concretions. The mineralization of lignin aromatic compounds under aerobic conditions was accompanied by the significant increase in the share of phenol acids. 相似文献
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Semenov V. M. Lebedeva T. N. Pautova N. B. Khromychkina D. P. Kovalev I. V. Kovaleva N. O. 《Eurasian Soil Science》2020,53(4):454-466
Eurasian Soil Science - The distribution of total organic matter (Corg), particulate organic matter (CPOM), and potentially mineralizable organic matter (C0) in mega- (10–5 and 5–2 mm),... 相似文献
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Kovalev I. V. Semenov V. M. Kovaleva N. O. Lebedeva T. N. Yakovleva V. M. Pautova N. B. 《Eurasian Soil Science》2021,54(7):1059-1067
Eurasian Soil Science - A comparison of the biological activity and biogenicity of drained and nondrained gleyed agrogray soils (Luvic Greyzemic Stagnic Phaeozems) of Moscow oblast has been carried... 相似文献
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The content and composition of the lignin phenols in plants and soils of vertical natural zones were studied in the Northern
Caucasus region and Northwestern Tien Shan. Three types of lignin transformation were revealed: steppe, forest, and meadow
ones. It was shown that the degree of oxidation of the biopolymer during the transformation of organic matter increased when
going from the living plant tissues to humic acids in surface and buried soils. The portion of lignin fragments remained unchanged
during the biopolymer transformation in the following series: plant tissues-falloff-litter-soil-humic acids-buried humic acids.
It was also shown that the biochemical composition of the plants had a decisive effect on the structure of the humic acids
in the soils. The quantitative analysis of the lignin phenols and the 13C NMR spectroscopy proved that the lignin in higher plants was involved in the formation of specific compounds of soil humus,
including aliphatic and aromatic molecular fragments. The first analysis of the lignin content and composition in buried soils
of different ages was performed, and an increase in the degree of oxidation of the lignin structures was revealed in the soil
chronoseries. It was proposed to use the proportions of lignin phenols in surface and buried soils as diagnostic criteria
of the vegetation types in different epochs. 相似文献
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E.?I.?Kovaleva A.?S.?Yakovlev M.?G.?Nikolaenko A.?O.?Makarov A.?A.?Makarov 《Eurasian Soil Science》2017,50(3):350-358
The ecological status of oil-contaminated soils of Sakhalin and their background analogues has been evaluated with the use of soil invertebrates. The survival rates of Enchytraeus albidus in soils with different textures and the contents of organic carbon and nutrients have been compared. The indicative role of soil mesofauna (Enchytraeus albidus) for the ecological evaluation of oil-contaminated soils with due account for their properties has been shown. The permissible residual concentration of oil hydrocarbons in some soils of Sakhalin—acid brown forest soils (Umbrisols), high-moor peat soils (Histosols), acid meadow alluvial soils (Fluvisols), cultivated meadow soddy soils (Anthrosols), and mucky-podzolic surface-gleyed soils (Gleysols)— has been determined from data on the response of Enchytraeus albidus to different levels of the soil contamination with oil hydrocarbons. 相似文献
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The composition of organic phosphorus compounds was studied using the 31P NMR spectroscopy method in agrogray soils with periodic water logging. The phosphorus content was determined by the specific
difference between the hydrological and the redox regimes of these soils. The phosphorus of the organic compounds in the agrogray
soils with contrasting water regimes is composed mostly of phosphoric monoesters and diesters, including nucleic and teichoic
acids. The relative distribution of the monoesters and inorganic orthophosphates is shown depending on the climate and the
soil’s position in the relief. The area of the monoester peaks increases by two times and that of the mineral orthophosphate
decreases by six times in the agro-gray soils of Bryansk opolie with an optimal regime of moistening and evaporation in comparison
with the agro-gray gleyed soils of Kolomna opolie. As the degree of the soil hydromorphism in the sequence of deeply gleyed
soils and gleyic soils increased, the portion of monoesters decreased. Favorable conditions for the microbial activity are
formed in soils with a contrasting redox regime, and this is expressed in the accumulation of labile diesters. Inverse relationships
were found between the distributions of the mono- and diesters in iron-manganic nodules and in the soils enclosing them; this
was caused by the different mechanisms of the stabilization of the stable and labile phosphorus containing compounds. A high
percentage of mineral orthophosphate in the nodules allows assuming the presence of chemisorbed orthophosphate ions in organomineral
phosphate-metal-humus complexes. The transformation of iron-manganic nodules under the influence of drying demonstrates the
more direct participation of microorganisms in the nodules’ formation than the contribution of the physicochemical processes. 相似文献
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Kovaleva Ekaterina I. Guchok M. V. Terekhova V. A. Demin V. V. Trofimov S. Ya. 《Journal of Soils and Sediments》2021,21(5):1974-1988
Journal of Soils and Sediments - The disposal of drill cuttings (DCs) in landfills is one of the major impacts of oil extraction on the environment. The DC composition is predetermined by the type... 相似文献
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The microbiological characterization of the brown forest soils in the territory of the Botanical Garden-Institute of the Far East Division of the Russian Academy of Sciences in southern Primor’e is given. The high humus content and weakly acid reaction of these soils were shown to provide the optimal conditions for the development of bacteria. In the brown forest soils differing in the thickness of the humus horizons, all the ecologic-trophic groups of bacteria were present and the bacterial communities were highly diverse. The structure of the bacterial communities was identical in all the organomineral horizons of the soils and varied greatly by the seasons. In the anthropogenically disturbed soils, the share of corynebacteria, which are resistant to stress and capable of the destruction of xenobiotics, decreased. 相似文献