Assessing the humus status and CO2 production in soils of anthropogenic and agrogenic landscapes in southern regions of the Russian Far East

Пуртова, Л. Н.; Костенков, Н. М.; Щапова, Л Н

doi:10.1134/s1064229317010124

Cited by 9 publications

(3 citation statements)

References 5 publications

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“…The difference in the indices of the Cmic stock in the compared soil types is less pronounced (17%, t = 2.47; P = 0.02), which is explained by the higher indices of the soil bulk density in the sample characterizing the upper horizons of mountain chernozems (Table 2). The ratio of microbial carbon (Cmic/Corg,%) characterizes the content of the living and active part of soil organic carbon, which is involved in the subsequent processing of all soil organic matter (Ananyeva, 2003;Purtova et al, 2017). 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.…”

Section: Physical and Physicochemical Soil Propertiesmentioning

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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Section: Physical and Physicochemical Soil Propertiesmentioning

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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“…Soils under the influence of systematic treatment, fertilizing, land reclamation, irrigation and drainage and other anthropogenic influences change either in the direction of cultivation or in the direction of degradation [1,2]. Largescale irrigation of soils formed in areas with unstable and insufficient moisture was started in the 70-80s of the last century and ended by 2000.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Agroecological State of Long-Term Irrigated Meadow-Chernozem Soil

Aksenova¹,

Nevenchannaya²,

Boiko³

et al. 2020

Proceedings of the International Scientific Conference the Fifth Technological Order: Prospects for the Development and Moderni

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We examined the effect of long-term irrigation on the fertility of meadow-chernozem soil and evaluated its current agroecological state. The humus content stabilized at the average level and varied over the years of the research in the range from 4.95-5.18% in the 0-20 cm layer to 4.88-5.21% in the 20-40 cm layer. The humification degree of organic matter in irrigated soil was high, the ratio of humic and fulvic acids did not change and amounted to 1.5-1.7, the type of humus remained stably fulvate-humate. Humic acids occupy more than 50.0% of the humus and their amount did not change under the influence of irrigation. Soils are characterized by a very low content of the free fraction of humic acids, a medium content of acids linked to calcium and a high content of acids, bound to the mineral part of the soil. A redistribution of fractions was observed within the groups of humic acids. The amount of humic and fulvic acids bound to the mineral part of the soil increased by 1.2-2.0% with simultaneous reduction of humic acids linked to calcium. The content of the fraction of free fulvic acids increased. The energy potential of organic matter is at the critical level. The part of the most accessible energy is accumulated in mobile humic acids. They concentrate from 79 to 192 GJ/ha of potentially active energy. Under the influence of irrigation in the soil, a tendency for the development of secondary alkalinization was noted, as evidenced by an increase in the composition of exchange magnesium cations and an increased sodium content reaching 7%. The structural aggregation testified to the development of physical degradation. The content of aggregates with agronomic value did not exceed 45.2-59.9% and was below the optimal level. Soil aggregates were not resistant to the destructive effects of water.

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“…Chalaya, T. A., 2012, Carbon Ibid., 39, 5, 461-469, DOI: 10.1134/ S1064229306050012 Kovaleva, G. V.;Shchapova, L. N.; Purtova, L. N., 2016 Kurganova, I.; Lopes de Gerenyu, V.; Six J., Kuzyakov, Y., 2014, Carbon Cost of Collective Farming Collapse in russia, Glob. Change Biol., 20, 938-947.…”

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confidence: 99%

Состояние Гумуса В Некоторых Типах Залежных Почв Приморья

Purtova¹,

Kiseleva²,

Burdukovsky³

2019

Vestn. Sev.-Vost. naučn. centra Dal'nevost. otd. RAN

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Assessing the humus status and CO2 production in soils of anthropogenic and agrogenic landscapes in southern regions of the Russian Far East

Cited by 9 publications

References 5 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

Assessment of the Agroecological State of Long-Term Irrigated Meadow-Chernozem Soil

Состояние Гумуса В Некоторых Типах Залежных Почв Приморья

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