Determinacy and synchronicity of fallow succession in the Tuva steppes

Titlyanova, A. A.; Самбуу, А. Д.

doi:10.1134/s1062359014060120

Cited by 14 publications

(6 citation statements)

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“…In steppe regions, the grasses and herbs recover completely during a much shorter period (30–60 years) compared with forests (Lyuri et al, ). Under strongly continental arid conditions in East Siberia (Tyva Republic), the aboriginal steppe species become dominant already after 11–17 years of post‐agrogenic succession (Titlyanova & Sambuu, ). The time of soil restoration during post‐agricultural evolution largely corresponds to the regeneration period for vegetation and is actually longer (Lyuri et al, ).…”

Section: Introductionmentioning

confidence: 99%

Recovery of organic matter and microbial biomass after abandonment of degraded agricultural soils: the influence of climate

et al. 2019

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After abandonment of agricultural lands (ongoing on 220 million hectares worldwide), degraded arable soils undergo self‐restoration and development towards natural ecosystems. We studied the linkage between microbial properties and density fractions of soil organic matter (SOM) during post‐agricultural restoration of former arable Phaeozems and Chernozems. The chronosequence study was conducted in two contrasting bioclimatic zones of European Russia: deciduous forest (Luvic Phaeozem) and dry steppe (Calcic Chernozem). Each chronosequence included an arable soil, 3–4 soils with increasing periods after abandonment (from 7 to 35 years), and reference sites with native soils. The basal respiration (BR) and microbial biomass (Cmic) were closely correlated with the soil organic carbon (Corg) content as well as SOM density fractions: free particulate organic matter (fPOM), occluded particulate organic matter (oPOM), and mineral–SOM. The greatest increase in most properties was common in the top 0–5 cm and was maximal for fPOM and oPOM fractions (by 1.5–2.5‐times), Cmic (1.9‐times), and BR (1.5–2.5‐times). For the first time, the duration of full recovery of soil properties depending on climate were estimated. Generally, ~40–120 and 20–30 years in the forest and steppe, respectively, are required to restore Corg, total nitrogen (TN), and Cmic contents in the 0‐ to 5‐cm layer after the abandonment of agricultural lands. The maximal restoration rates of all properties are common in the first 15–20 years after abandonment.

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Section: Introductionmentioning

confidence: 99%

Recovery of organic matter and microbial biomass after abandonment of degraded agricultural soils: the influence of climate

et al. 2019

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“…The search for these parameters is one of the tasks of stability theory. One of the ways to solve it is to localize the eigenvalues of the matrix [37][38][39].…”

Section: Resultsmentioning

confidence: 99%

Mathematical Models of the Dynamic Stability of Arid Pasture Ecosystems in the South of Russia

Salugin

Vlasenko

2022

Agronomy

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In this study, the issue of the ecological stability of the soil and vegetation cover of the North-Western Near-Caspian arid zones within the borders of the Black Lands (BL) of the Republic of Kalmykia was considered. Modeling was carried out of the open systems’ thermodynamics principles using continuous and discrete formalisms. Models presented in the form of systems of ordinary differential equations, Markov’s circuits, and autonomous impulse processes show the possibility of their application in the management of pasture feed stocks. Modeling with the systems of differential equations makes it possible to identify points of stable states of pasture systems. Markov circuits are able to establish an optimal animal load on these systems. A computational algorithm for determining the stability of pasture ecosystems using autonomous impulse processes allows optimization problems to be solved to determine the conditions for the spread of external influences. Computational experiments were carried out to determine the parameters of the model corresponding to the sustainable mode of operation in arid pasture ecosystems.

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“…As was shown earlier (Titlyanova and Sambuu, 2014), successions on all fallow lands relatively rapidly (for 17 years) result in communities whose species composition is similar to that of the original steppe phytocenoses; however, the structure of phytomass develops more slowly, especially in the underground zone.…”

Section: Secondary Vegetation Successionsmentioning

confidence: 87%

Biogeochemical Features of Fallow Lands in the Steppe Zone

2016

SEJ

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Abstract-Fallow lands in ancient agricultural areas of Northwestern Crimea which had experienced repeated phases of agricultural activity at different time periods (the Late Bronze Age, antiquity, and the last 150−200 years) have been studied. Differences in biogeochemical fluxes for virgin and fallow soils are analyzed from the chemical elements determining the composition of secondary clay minerals. The most informative and evolutionarily significant biogeochemical indicators of relict agricultural loads and duration of fallow periods are specified.

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Determinacy and synchronicity of fallow succession in the Tuva steppes

Cited by 14 publications

References 1 publication

Recovery of organic matter and microbial biomass after abandonment of degraded agricultural soils: the influence of climate

Recovery of organic matter and microbial biomass after abandonment of degraded agricultural soils: the influence of climate

Mathematical Models of the Dynamic Stability of Arid Pasture Ecosystems in the South of Russia

Biogeochemical Features of Fallow Lands in the Steppe Zone

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