The biological activity of chernozems in the Central Caucasus Mountains (Terskii variant of altitudinal zonality), Kabardino-Balkaria

Гедгафова, Ф. В.; Uligova, T. S.; Gorobtsova, O. N.; Tembotov, Rustam

doi:10.1134/s1064229315120078

Cited by 8 publications

(5 citation statements)

References 11 publications

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“…The background soils are also characterized by a low content of organic carbon, which is typical for the soils of this region (Gorobtsova et al, 2017(Gorobtsova et al, , 2021. The low content of organic matter in the Phaeozems sampled in Progress settlement is explained both by their genetic features and by the fact that the content of organic matter decreases in soils during their reclamation, with which other authors agree (Gedgafova et al, 2015;Liu et al, 2016). It was found that in the primary soils sampled in the clay quarry, the content of organic carbon is higher than in the background soil.…”

Section: Study Of Agrochemical Properties Of Soilsmentioning

confidence: 84%

Micromorphological soil assessment in abandoned quarry dumps of the Central Caucasus, Russia

Tembotov

Abakumov

2023

EJSS

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This study compared the micromorphological and agrochemical metrics in soils from the quarry dumps and zonal soils, the Central Caucasus. Soil micromorphological investigations are important tool for evaluation of soil dynamics after anthropogenic impacts on terrestrial ecosystems. The results showed that the carbon content in the primary soil of the sand and gravel quarries was lower than that in the reference soil. The differences detected were statistically significant for both the Urvan plot soils (t = 11.95; p = 0.000) and the Progress plot soils (t = 18.73; p = 0.000). In contrast, in the quarry with clay bottom substrate (Gerpegezh), no significant difference was found between the reference and postmine soils. The reference soil around the sand and gravel quarries was slightly more acidic than the primary soil. In the clay quarry, the primary soil was more acidic with a strong acidic value, while the reference soil was neutral. The difference of nutrients (P, K, NH4+, NO3-) between the primary and reference soils were negligible. The only exception was the NO3- content in the reference soil of Progress settlement, where it was significantly higher (t = 4.19; p = 0.002) than in the original soil of the site. No difference was observed for the mineral component of the primary soil. Investigation of key zonal soils of the region. Zonal Caucasus soils: Phaeozem Gleiyc, Phaeozem and Umbric Retisol are different in terms of micro texture. Thus, Phaeozem Gleiyc characterizes by microstructure composed by primary angular mineral forms. Phaeozem and Retisol demonstrated formation of biogenic structure with alteration of mineral particles. Data obtained show that rapid self revegetation of the quarries results in initialization of primary soil formation and transformation of the soil microstructure and organization on the micro level.

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Section: Study Of Agrochemical Properties Of Soilsmentioning

confidence: 84%

Micromorphological soil assessment in abandoned quarry dumps of the Central Caucasus, Russia

Tembotov

Abakumov

2023

EJSS

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“…Evidently, for Chernozems calcaric and Chernozems calcaric residual-meadow soils in variants with different orography and climatic conditions, the location affects the spatial variation level of biological properties. It should be noted that, as estimated by the complex of studied biological parameters, Haplic Chernozems Pacnic soils show lower values in intensity of biological processes than other Chernozem subtypes in the steppe zone of Kabardino-Balkaria (Gedgafova, Uligova, Gorobtsova, and Tembotov, 2015;Gorobtsova, Khezheva, Uligova, and Tembotov, 2015).…”

Section: Bromus Mollismentioning

confidence: 95%

“…The main areas of Haplic Chernozems Pacnic soils within Kabardino-Balkaria are in agricultural use, and natural ecosystems with characteristic species composition of vegetation and soil mesofauna were preserved only in small areas. Ecological and biological studies in the area of Haplic Chernozems Pacnic soils make it possible to characterize the current state of the basic components of natural ecosystems and represent research continuation as part of developing methods to conduct ecological assessment of the soils within the Central Caucasus (Gedgafova, Uligova, Gorobtsova, and Tembotov, 2015;Gorobtsova, Khezheva, Uligova, and Tembotov, 2015).…”

Section: Introductionmentioning

confidence: 99%

Ecological and biological studies in the haplic chernozems pacnic soils area in the Central Caucasus (Kabardino-Balkaria)

Uligova¹,

Gorobtsova²,

Tsepkova³

et al. 2017

BioComm

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The northern macroslope of the Central Caucasus and adjacent areas of the Middle Ciscaucasia belong to the Northeast Caucasian (semi-desert) type of vertical zonation. This type, which includes terskiy and elbrusskiy variants of vertical zonation, differs from the Northwest Caucasian vertical zonation by general xerophytization of landscapes. The Haplic Chernozems Pacnic soils of Kabardino-Balkaria formed within steppe zone of mentioned variants are almost entirely involved in agricultural use; natural ecosystems with characteristic species composition of natural vegetation and mesofauna were preserved only in small areas inconvenient for arable activity. Characteristics of the current ecological-biological state of the steppe ecosystem components from the Haplic Chernozems soils area (soil -vegetation -earthworms) is given. The values of synecological indices (Shannon's, Simpson's, Pielou's, Hartley's, and integral) characterize high floristic and phytocenosis diversity, and synantropization indices correspond to average levels. Earthworms are in abundance and represent the largest part of the mass of soil organisms in species composition, which corresponds to steppe zonal conditions and testifies to the dominance of the saprotrophic complex. The correlation and factor analysis by the principal components method shows wide ranges of interdependence in functioning of ecosystems components: between diversity of biotic communities and biological properties (humus content, microbial biomass carbon contents (C mic ), intensity of microbial respiration, enzymatic activity) and physicochemical properties (pH of soil solution, field moisture, soil density) of Haplic Chernozems.

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“…The established differences in absolute values between soil types are statistically significant for all enzymes (t ≥ 2.72; p ≥ 0.00), except for urease (t = 1.41; p = 0.16). According to the literature data (Sinsabaugh et al, 2010;Oliveira Silva et al, 2018;Kazeev et al, 2021) and the results of previous studies of the lowland chernozems of Kabardino-Balkaria (Gedgafova et al, 2015;Gorobtsova et al, 2016) the activity of hydrolytic enzymes is closely related to the organic matter content.…”

Section: Biochemical Soil Propertiesmentioning

confidence: 97%

“…An approach that provides the comprehensive determination of several informative indicators of biological activity (the humic content, the intensity of soil microbial respiration, the activity of soil enzymes of two classes: hydrolases (invertase, phosphatase, urease) and oxidoreductases (dehydrogenase, catalase)) proved to be effective for the assessment of a biological state of a soil cover (Kazeev et al, 2004;Gedgafova et al, 2015;Gorobtsova et al, 2016;Khakunova et al, 2018). These parameters reflect various aspects of the soil biological properties (genetic, microbiological, biochemical), and their combination makes it possible to establish the general level of biological activity and express it through the integrative index of ecological and biological condition (IIEBC) (Kazeev et al, 2004;Kolesnikov et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Assessment of biological activity in mountain chernozems and mountain-meadow chernozemic soils of natural biogeocenoses in the Central Caucasus, Russia

Гедгафова¹,

Gorobtsova²,

Uligova³

et al. 2022

Eurasian Journal of Soil Science (Ejss)

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Article InfoIndicators reflecting various aspects of biological properties (genetic, microbiological, biochemical) were estimated for the upper horizons (0-20 cm) of mountain chernozems (Mollic Chernozems, WRB, 2015) and mountain meadow chernozemic soils (Mollic Leptosols Eutric, WRB, 2015), that were formed in the conditions of natural biogeocenoses of the Central Caucasus (Elbrus variant of zonality within Kabardino-Balkaria). A comparative assessment was performed for the biological activity parameters (humic content and stock, microbial biomass carbon (Cmic) content and stock, the enzyme activity of hydrolases (invertase, phosphatase, urease) and oxidoreductases (catalase, dehydrogenase)) in combination with indicators of the soil density and acid-base properties of various subtypes of the studied soils (typical and leached). The obtained results showed that the studied types of mountain soils in the upper horizons are characterized by a porous loose composition (0.75-1.07 g/cm 3 ), neutral (pHH2O = 7.0-7.4) and slightly alkaline (pHH2O = 7.9-8.0) by the reaction of the soil solution, high and very high content (9.5-19.1%) and stock of organic matter (173-276 t/ha). The maximal biological activity was noted in mountain-meadow chernozemic soils, which surpass mountain chernozems in humic content (by 42%) and stock (24%), Cmic content (38%) and stock (17%), relative total activity of hydrolases (36%), but inferior in activity of oxidoreductases (32%). Based on the data obtained, the integrative index of ecological and biological condition (IIEBC) was calculated, which reflects the general level of biological activity of the studied soils. Higher IIEBC values of mountain meadow chernozemic soils (80-100%) in comparison with mountain chernozems (70-74%) are due to the unique complex of soil-forming conditions in which these soils function. The established biological parameters of mountain soils of natural landscapes are necessary for use as reference in environmental studies of anthropogenically disturbed biogeocenoses.

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The biological activity of chernozems in the Central Caucasus Mountains (Terskii variant of altitudinal zonality), Kabardino-Balkaria

Cited by 8 publications

References 11 publications

Micromorphological soil assessment in abandoned quarry dumps of the Central Caucasus, Russia

Micromorphological soil assessment in abandoned quarry dumps of the Central Caucasus, Russia

Ecological and biological studies in the haplic chernozems pacnic soils area in the Central Caucasus (Kabardino-Balkaria)

Assessment of biological activity in mountain chernozems and mountain-meadow chernozemic soils of natural biogeocenoses in the Central Caucasus, Russia

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