Seasonal Dynamics of Microbial Biomass in Soddy-Podzolic Soil

Никитин, Д. А.; Chernov, T. V.; Железова, А. Д.; Тхакахова, А. К.; Nikitina, S. A.; Semënov, Mikhail; Xenofontova, N. A.; Kutovaya, O. V.

doi:10.1134/s1064229319110073

Cited by 14 publications

(4 citation statements)

References 27 publications

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“…This result may indicate an equally high ability of prokaryotes to survive in polar regions, regardless of their geographic location. However, the maximum of prokaryotes (about 10 9 cells/g of soil) in the analyzed soils is comparable in an order of magnitude with that for soddy-podzolic soils of central Russia [ 40 , 41 , 42 ]. This fact indicates a high potential for the biological activity of microorganisms in some loci, even for the Arctic territories.…”

Section: Discussionmentioning

confidence: 75%

Qualitative and Quantitative Characteristics of Soil Microbiome of Barents Sea Coast, Kola Peninsula

2021

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The soil microbiome of the Barents Sea coast of the Kola Peninsula is here characterized for the first time. The content of copies of ribosomal genes of archaea, bacteria, and fungi was determined by real-time PCR. Reserves and structure of biomass of soil microorganisms such as total biomass of fungi and prokaryotes, length and diameter of mycelium of fungi and actinomycetes, proportion of mycelium in biomass, number of spores and prokaryotic cells, proportion of small and large fungal propagules, and morphology of mycobiota spores were determined. The largest number of ribosomal gene copies was found for bacteria (from 6.47 × 109 to 3.02 × 1011 per g soil). The number of copies of ribosomal genes of fungi and archaea varied within 107–109 copies of genes/g soil. The biomass of microorganisms (prokaryotes and fungi in total) varied from 0.023 to 0.840 mg/g soil. The share of mycobiota in the microbial biomass ranged from 90% to 97%. The number of prokaryotes was not large and varied from 1.87 × 108 to 1.40 × 109 cells/g of soil, while the biomass of fungi was very significant and varied from 0.021 to 0.715 mg/g of soil. The length of actinomycete mycelium was small—from 0.77 to 88.18 m/g of soil, as was the length of fungal hyphae—an order of magnitude higher (up to 504.22 m/g of soil). The proportion of fungal mycelium, an active component of fungal biomass, varied from 25% to 89%. Most (from 65% to 100%) of mycobiota propagules were represented by specimens of small sizes, 2–3 microns. Thus, it is shown that, despite the extreme position on the mainland land of Fennoscandia, local soils had a significant number of microorganisms, on which the productivity of ecosystems largely depends.

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Section: Discussionmentioning

confidence: 75%

Qualitative and Quantitative Characteristics of Soil Microbiome of Barents Sea Coast, Kola Peninsula

2021

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“…Soil was classified as Eutric Albic Retisol [38], according to the world reference base (WRB) classification [20]. The full profile description is as follows: P, old arable horizon, 0-32 cm; BEL, subeluvial horizon, 32-40 cm; BT1, textural horizon, 40-50 cm; BT2, textural horizon, 50-67 cm; BC, 67-130 cm [39]. Plant cover comprises a secondary herbaceous community with the following dominant species (in June): Vicia sativa, Equisetum arvense, Ranunculus acris, Sonchus arvensis, Lactuca serriola, Poa pratensis, Taraxacum officinale, Trifolium pratense, Phleum pratense and Vicia cracca.…”

Section: Study Site and Sampling Workflowmentioning

confidence: 99%

Seasonal Dynamics of Soil Bacterial Community under Long-Term Abandoned Cropland in Boreal Climate

et al. 2022

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The collapse of collective farming in Russia after 1990 led to the abandonment of 23% of the agricultural area. Microbial biomass is a transit pool between fresh and soil organic matter; therefore, structural changes in soil microbial community determine the carbon cycle processes caused by self-restoration of arable lands after abandonment. Here, we assessed the influence of monthly changes in moisture and temperature on the bacterial community structure and abundance in Retisols under long-term abandoned cropland. Two periods with pronounced differences in bacterial properties were revealed: the growing period from March to September and the dormant period from October to February. The growing period was characterized by higher bacterial abundance and diversity compared to the dormant period. The relative abundances of the bacterial community dominants (Alpha-, Gamma- and Deltaproteobacteria, subgroup 6 of phylum Acidobacteria) did not change significantly over the year, either in total or active communities. The relative abundances of Bacteroidetes and Verrucomicrobia increased in the growing period, whereas Actinobacteria and Chloroflexi were more abundant in the dormant period. The microbial gene abundances positively correlated with soil and air temperature, but not with soil moisture. Thus, the seasonal dynamics of soil microbial communities are closely related to soil temperature and should be considered when assessing carbon cycles in abandoned lands.

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“…In modern agriculture, the main tillage in agrotechnological complexes of crop cultivation is carried out mainly with the use of plowing, surface and non-moldboard methods, which, with a certain combination, form a system of tillage in crop rotation [12]. Minimization of tillage in crop rotations leads to conflicting results on crop productivity [9,13].…”

Section: Introductionmentioning

confidence: 99%

Resource-saving technologies for the basic cultivation of chernozem typical in the northeastern region of the Central Chernozem region

Shabalkin,

Skorochkin,

Vorontsov

et al. 2023

BIO Web Conf.

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The research was carried out with the aim of solving the problem of optimizing the system of basic tillage, providing a reduction in energy costs, obtaining high crop productivity and profitability of production in a grain-fallow crop rotation in the conditions of the northeast of the Central Chernozem Region. The work was carried out in 2013-2021, in a stationary field experiment on a typical heavy loamy chernozem with a high supply of mineral nutrients with a humus content in the arable layer of 6.8-7.0%. The scheme of the experiment included the following options for the main tillage systems: traditional mid-depth moldboard, for soybean at 25-27 cm (control); resource-saving: surface (disking by 10-12 cm) for all crops and non-moldboard mid-depth, 25-27 cm for soybeans and 20-22 cm for cereals; combined: moldboard-less plowing (25% plowing for soybeans + 75% non-moldboard semi-deep plowing for cereals) and moldboard-surface (25% plowing for soybeans + 75% surface plowing for cereals). Against the background of treatments for crop rotation, fertilizers and plant protection products were used. It was found that resource-saving non-moldboard and combined tillage for sowing, on average, for crop rotation crops, accumulated more moisture in the arable layer by 12.1-13.8%, by 3.9-7.8% in the meter layer, compared with traditional moldboard cultivation. . Surface tillage reduced the reserve of productive moisture in the arable layer by 4.4%, in the meter layer - by 5.1%. It has been studied that the best nitrogen, phosphorus and potassium regimes are established with traditional dump and combined dump-surface treatments. In the variants with surface and non-moldboard tillage, a decrease in the content of mineral nutrition elements in the arable soil layer is noted. At the same time, there was an increase in the process of differentiation of the arable layer by fertility with a concentration of nutrients in the layer of 0-10 cm and a significant decrease in them in the layer of 20-30 cm. 2.1 times without herbicides, 2.2 times against the background of herbicide treatment, in terms of the number of weeds and 1.4 and 1.5 times in terms of their mass, in comparison with traditional moldboard treatment. The use of herbicides contributed to a decrease in the number of weeds and the mass of the weed component on average for the variants of the experiment by 55.4 and 60.0%, respectively. It was analyzed that the use of surface and non-moldboard tillage systems led to a decrease in the productivity of a hectare of arable land in crop rotation by 0.09 tons of grain units without protection and by 0.11-0.14 tons in combination with plant protection. The combined (dump-surface) system of tillage ensured the productivity of arable land at the level of the traditional dump system at different depths. It has been proved that the highest profitability of production in crop rotation (250.3%) was achieved using a combined (dump-surface) tillage system in combination with the use of complex protection products (seed dressing + pesticides for crop vegetation). Resource-saving processing systems (surface and non-moldboard) worsened economic performance. Income from the use of these tillage systems decreased by 4.8-5.5%, profitability decreased by 1.6-2.7% compared to the traditional mid-depth moldboard tillage system in crop rotation.

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Seasonal Dynamics of Microbial Biomass in Soddy-Podzolic Soil

Cited by 14 publications

References 27 publications

Qualitative and Quantitative Characteristics of Soil Microbiome of Barents Sea Coast, Kola Peninsula

Qualitative and Quantitative Characteristics of Soil Microbiome of Barents Sea Coast, Kola Peninsula

Seasonal Dynamics of Soil Bacterial Community under Long-Term Abandoned Cropland in Boreal Climate

Resource-saving technologies for the basic cultivation of chernozem typical in the northeastern region of the Central Chernozem region

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