Сarbon Pool and Biological Activities of Soils in Different Ecosystems

Demyanyuk, Olena; Symochko, Lyudmyla; Hamuda, Hosam E. A. F. Bayoumi; Symochko, Vitaliy; Дмитренко, Ольга Василівна

doi:10.31407/ijees9122

Cited by 8 publications

(6 citation statements)

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“…In particular, as our studies showed, the application of mineral fertilizers into chernozem soils has activated the development of pedotrophic and oligotrophic microorganisms and microorganisms using N min by 1.3-1.5 times (Demyanyuk et al, 2019). At the same time, growth of values of coefficients K min and K ped was fixed for 18% and 9%, respectively.…”

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confidence: 73%

Structure and Dynamics of Soil Microbial Communities of Natural and Transformed Ecosystems

Demyanyuk

Symochko

Shatsman

2020

EREM

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Soil microbial communities play an important role in ecosystems functioning and are on the field scale essential for plant nutrition and health. On a larger scale, they contribute to global element cycling. Furthermore, they are involved in the turnover processes of organic matter, the breakdown of xenobiotics and the formation of soil aggregates. An ecological state of soils depends on the structure and activity of soil microorganisms. The results of soil monitoring in various ecosystems in different climatic zones of Ukraine showed a clear trend for the correlation between the agroecological conditions and activity of microbiocenosis. The most significant influence of agricultural activity on the soil microbiota can be observed on the poorly soddy-podzolic and gray forest soils, where the crop cultivation without fertilization resulted in a decrease in the total count of microorganisms by 2.2-4.5 times. Application of agricultural measures aimed at achieving maximum productivity, specifically the combination of mineral, organic and biological fertilizers, contributes to an average 1.3-4.1 times increase in the total count of microorganisms in the soil, compared with non-fertilized variants. Soils with low content of organic matter and acidic medium, soddy-podzolic and gray forest soils were characterized by a high number of micromycetes, 136-185×103 CFU·g-1 soil, and a relatively low number of eutrophic and nitrogen-fixing microorganisms. The soil of natural ecosystems is characterized by a high total count of the microorganisms with a balanced structure of various ecological-trophic groups and balanced processes of mineralization-immobilization, organic matter decomposition, and humus accumulation.

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confidence: 73%

Structure and Dynamics of Soil Microbial Communities of Natural and Transformed Ecosystems

Demyanyuk

Symochko

Shatsman

2020

EREM

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“…Microbial communities in soils participate in the processes of accumulation and decomposition of plant organic carbon ( Miltner et al, 2012 ; Demyanyuk et al, 2019 ; Symochko, 2020 ; Rodrigues et al, 2023 ), but for a long time, it has remained a challenge to directly connect the microbiological activity of the soil with its ability to absorb C in the soil. Up to 5% of the total amount of SOM is represented by microbial biomass, and it is a more sensitive indicator of changes in soil conditions than direct analysis of C org ( Leita et al, 1999 ).…”

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confidence: 99%

“…Compared to their natural counterparts, the loss of C org in arable soils was 29-47% due to a significant decrease (43–56%) in the C mic content. This can be attributed to the application of agricultural fertilisers that cause an imbalance in the microbial community of the soil, reduce microbial productivity, and activate the processes of mineralisation of OM ( Demyanyuk et al, 2019 ; Symochko, 2020 ). In contrast, the soil of natural ecosystems is characterised by a high content of C mic as part of C org , which indicates high microbial productivity and fixation of organic substances in the biomass of microorganisms.…”

Section: Resultsmentioning

confidence: 99%

“…This balance depends on the rate of entry of organic matter (OM) into the soil and the rate of its mineralisation. Therefore, as SOM is one of the largest C sinks on Earth ( O’Rourke et al, 2015 ), it is essential to study the influence of various environmental and anthropogenic factors on SOM, its content, accumulation, and destruction ( Lehmann and Kleber, 2015 ; Demyanyuk et al, 2019 ; Fazi et al, 2019 ; Rodrigues et al, 2023 ).…”

Section: Introductionmentioning

confidence: 99%

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Microbial transformation of soil organic matter under varying agricultural management systems in Ukraine

Symochko,

Demyanyuk,

Crisan

et al. 2024

Front. Microbiol.

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IntroductionThis paper presents comparative studies on the content and structure of organic matter (OM) and the activity of microbiological cellulose destruction in three types of Ukrainian soils intensively used in agricultural production.MethodsThe highest content of humus in the arable layer (4.9%), OM (410 t ha−1), and total carbon (30.9 mg C g−1 soil) was determined in chernic phaeozems, which is 2.2–2.5 times higher than in albic retisols. The soil of natural ecosystems is characterised by a high content of microbial carbon (Cmic) in the carbon fraction of organic soil compounds.Results and discussionIn arable soils, the content and reserves of humus and soil organic matter (SOM) have decreased by an average of 1.5–2 times. The most considerable loss of humus reserves in the soil profile was identified in albic retisols (1.96–1.44 times) and the smallest in chernic phaeozems (1.27–1.81 times). During the long-term systematic application of mineral fertilisers, the Corg content decreased by 8-21% in chernic phaeozems, 12-33% in greyzemic phaeozems, and 6–38% in albic retisols. A significant difference of 2.1–8.0 times was determined regarding the number of aerobic cellulolytic microorganisms and 1.3–3.3 times in the potential cellulolytic activity of the studied soils. The high number of cellulose-destroying microorganisms is characteristic of chernic phaeozems with a high content of OM in the soil; the advantage over other types of studied soils was 1.4 times and 7.8 times for greyzemic phaeozems and albic retisols, respectively. Among the studied soil types, high values of CO2 emissions were identified in chernic phaeozems. Intensive agricultural practices in Ukrainian soils have significantly altered the content and composition of organic matter, leading to reduced humus and soil organic matter reserves. The study also underscores the importance of considering the abundance of cellulose-destroying microorganisms and their potential activity in assessing soil health and sustainability.

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“…This affects the nature and rate of decomposition of organic fertilizers in the soil, and the speed of use by plants of nutrients contained in them (Litvinova et al, 2021). Carbon dioxide released during the decomposition of organic fertilizers promotes the transition of carbonates into bicarbonates, and humus substances formed from organic fertilizers together with lime have a beneficial effect on improving the physical properties of the soil (Demyanyuk et al, 2019). With application of agrochemicals, soil properties, mobility and accessibility of macro-and microelements are largely changed (Bondar et al, 2019;Makarenko et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Soil Management in Agroecosystems - Impact on the Сation-Anion Composition in the Aeration Zone of Soils

Litvinov,

Symochko,

Litvinova

et al. 2023

Int. j. ecosyst. ecol. sci.

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The research aimed to analyze the cation-anion composition of the soil solution in dark-grey podzolized soil under the influence of long-term anthropogenic factors. Over the extended application of both mineral and organic fertilizers, changes in the cation-anion composition of the soil were observed, depending on the dosage of mineral fertilizers and their distribution within the soil profile. When the amount of mineral fertilizers was increased from 265 kg NPK per hectare to 397 kg per hectare, a noticeable decrease in soil solution pH was observed, with pH levels dropping to 6.1 and 6.0, as compared to the control variant without any fertilizer application, which exhibited a pH of 6.3. The application of mineral fertilizers and manure additionally enriched the soil with ions of organic and inorganic acids, what became the reason for the redistribution between mobile and immobile forms of calcium and magnesium in the direction of increase of their mobility beyond the soil profile. The greatest accumulation of sulphate was observed at a depth of 160-280 cm due to the migration of their water-soluble forms. The main quantity of chlorine was moved and accumulated in the soil layer of 120-280 cm, and the increase of mineral fertilizers increased the content of chlorine in the aeration zone.

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Сarbon Pool and Biological Activities of Soils in Different Ecosystems

Cited by 8 publications

References 0 publications

Structure and Dynamics of Soil Microbial Communities of Natural and Transformed Ecosystems

Structure and Dynamics of Soil Microbial Communities of Natural and Transformed Ecosystems

Microbial transformation of soil organic matter under varying agricultural management systems in Ukraine

Soil Management in Agroecosystems - Impact on the Сation-Anion Composition in the Aeration Zone of Soils

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