Ecophysiological indicators of microbial biomass status in chernozem soils of the Central Caucasus (in the territory of Kabardino-Balkaria with the Terek variant of altitudinal zonation)

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

doi:10.1134/s1067413616010069

Cited by 28 publications

(11 citation statements)

References 6 publications

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“…An increase or decrease in this indicator shows a change in the nutrients availability, since the microbial biomass reacts very sensitively to any factors of disturbance, while the total soil carbon content, on the contrary, is a stable indicator. The Cmic/Corg values presented (Table 3) are close to the data previously established for chernozems in the plain part of Kabardino-Balkaria (2.8-4.7%) (Gorobtsova et al, 2016). The differences found at the level of the type of the studied soils are not statistically significant (t = 0.065; P = 0.95), and the characteristic Cmic/Corg indicator can be taken to be close to 3-4%.…”

Section: Physical and Physicochemical Soil Propertiessupporting

confidence: 85%

“…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%

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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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Section: Physical and Physicochemical Soil Propertiessupporting

confidence: 85%

Section: Biochemical Soil Propertiesmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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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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“…In this regard, ASP with higher soil pH and nitrogen content has the highest metabolic rate. To better understand the state of microbial communities, we also calculated CAI (Gorobtsova et al 2016). This parameter which is the ratio between BR and SIR is significantly lower in DNF compared to other forest stands.…”

Section: Soil Biological Activitymentioning

confidence: 99%

Soil fauna communities and microbial activities response to litter and soil properties under degraded and restored forests of Hyrcania

Bazyari¹,

Etemad²,

Kooch³

et al. 2021

iForest

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“…S BR and S SIR are considered as an index of soil quality and are controlled by S OM , soil nutrients, quality of the substrate, and humic substances(Singh et al 2012;Mganga et al 2016;Gorobtsova et al 2016). The S BR provide an estimate of heterotrophic activity of the soil microbial community and availability of soil carbon to soil microorganisms(Cheng et al 2013).…”

mentioning

confidence: 99%

Assessment of soil microbial and enzyme activity in the rhizosphere zone under different land use/cover of a semi-arid ecosystem, India

Meena

Rao

2020

Preprint

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Background Land use/cover changes and management practices are widely known to influence SOM quality and quantity. The present study investigated the effect of different land uses i.e. forests viz. mixed forest cover (MFC), Prosopis juliflora (Sw.) DC dominated forest cover (PFC), and cultivated viz. agriculture field (AF), vegetable filed (VF), respectively, on soil parameter, microbial activity, and enzymes involved in soil nutrient cycle in a semi-arid ecosystem.Results The results showed a significant reduction (P < 0.05) in soil carbon (SC), soil nitrogen (SN) content (~ 30–80%) and consequently the soil microbial biomass carbon (SMBC) (~ 70–80%), soil basal respiration (SBR), soil substrate induced-respiration (SSIR), and soil enzyme activities (β-glucosidase, acid phosphatase, and dehydrogenase) under cultivated sites in comparison to forest analogs due to land use management practices. Pearson’s correlation showed a positive correlation of SC with SMBC, SBR, and SSIR (P < 0.01) and enzymatic activities i.e. β-glucosidase, dehydrogenase (P < 0.05) suggesting the critical role of SC in regulating microbial and enzymatic activity. Also, a positive correlation of SM with urease (P < 0.01) was observed indicating the importance of soil abiotic factors in controlling enzymatic activities. Additionally, based on the PCA analysis, we observed the clustering of SMBC/SC ratio and qCO2 nearby AF.Conclusion Our study suggested that degraded sites are more sensitive to the land management practices and land use changes and needed immediate attention in future studies related to SC dynamics in semi-arid ecosystems.

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Ecophysiological indicators of microbial biomass status in chernozem soils of the Central Caucasus (in the territory of Kabardino-Balkaria with the Terek variant of altitudinal zonation)

Cited by 28 publications

References 6 publications

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

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

Soil fauna communities and microbial activities response to litter and soil properties under degraded and restored forests of Hyrcania

Assessment of soil microbial and enzyme activity in the rhizosphere zone under different land use/cover of a semi-arid ecosystem, India

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