Труды сотрудников ИЛ им. В.Н. Сукачева СО РАН

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    Effect of K2SO4 concentration on extractability and isotope signature (C-13 and N-15) of soil C and N fractions
[Text] / M. I. Makarov [et al.] // Eur. J. Soil Sci. - 2015. - Vol. 66, Is. 3. - P417-426, DOI 10.1111/ejss.12243. - Cited References:35. - This work was sponsored by the Russian Foundation for Basic Research (13-04-01090) and the Netherlands Organization for Scientific Research (NWO grants 047.011.2004.005, 047.017.010 and 047.018.003). . - ISSN 1351-0754. - ISSN 1365-2389
РУБ Soil Science

Аннотация: Determination of the labile soil carbon (C) and nitrogen (N) fractions and measurement of their isotopic signatures (C-13 and N-15) has been used widely for characterizing soil C and N transformations. However, methodological questions and comparison of results of different authors have not been fully solved. We studied concentrations and C-13 and N-15 of salt-extractable organic carbon (SEOC), inorganic (N-NH4+ and N-NO3-) and organic nitrogen (SEON) and salt-extractable microbial C (SEMC) and N (SEMN) in 0.05 and 0.5mK(2)SO(4) extracts from a range of soils in Russia. Despite differences in acidity, organic matter and N content and C and N availability in the studied soils, we found consistent patterns of effects of K2SO4 concentration on C and N extractability. Organic C and N were extracted 1.6-5.5 times more effectively with 0.5mK(2)SO(4) than with 0.05mK(2)SO(4). Extra SEOC extractability with greater K2SO4 concentrations did not depend on soil properties within a wide range of pH and organic matter concentrations, but the effect was more pronounced in the most acidic and organic-rich mountain Umbrisols. Extractable microbial C was not affected by K2SO4 concentrations, while SEMN was greater when extracted with 0.5mK(2)SO(4). We demonstrate that the C-13 and N-15 values of extractable non-microbial and microbial C and N are not affected by K2SO4 concentrations, but use of a small concentration of extract (0.05mK(2)SO(4)) gives more consistent isotopic results than a larger concentration (0.5m).

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Держатели документа:
Moscow MV Lomonosov State Univ, Soil Sci Dept, Moscow 119991, Russia
Inst Forest SB RAS, Dept Biogeochem, Krasnoyarsk 660036, Russia
Vrije Univ Amsterdam, Dept Ecol Sci, Fac Earth & Life Sci, Syst Ecol, NL-1081 HV Amsterdam, Netherlands

Доп.точки доступа:
Makarov, M.I.; Malysheva, T.I.; Menyailo, O.V.; Soudzilovskaia, N.A.; Van Logtestijn, R. S. P.; Cornelissen, J. H. C.; Russian Foundation for Basic Research [13-04-01090]; Netherlands Organization for Scientific Research (NWO) [047.011.2004.005, 047.017.010, 047.018.003]

    Isotopic Composition of Nitrogen and Transformation of Nitrogen Compounds in Meadow-Alpine Soils
/ M. I. Makarov, T. I. Malysheva, O. V. Menyailo // Eurasian Soil Sci. - 2019. - Vol. 52, Is. 9. - P1028-1037, DOI 10.1134/S1064229319090059. - Cited References:48. - This study was supported by the Russian Science Foundation, project no. 16-14-10208. . - ISSN 1064-2293. - ISSN 1556-195X
РУБ Soil Science

Аннотация: Isotopic composition of nitrogen in soils can be an informative indicator of N transformation processes and sources of N nutrition of plants, but data on d15N of labile N compounds are scarce. It is shown that N transformation in meadow-alpine soils (Leptic Umbrisols) of the northwestern Caucasus (Teberda Reserve, Karachay-Cherkess Republic) leads to well-expressed differences in isotopic signatures of different N compounds: d15N of extractable organic matter > d15Ntotal > d15N-> d15N-The range of d15N in this sequence reaches 25%. Differences in d15N within the same pool of N in soils of different alpine ecosystems, as well as seasonal dynamics of d15N-are much less pronounced (the range of d15N is 2-4%). The values of d15Ntotal and d15N-positively correlate with N mineralization and nitrification and demonstrate the accumulation of heavy N isotope in soils of the alpine ecosystems with more active N transformation processes. Obviously, nitrification is the key process controlling the isotopic signature of NThe role of N mineralization in the fractionation of N isotopes is less obvious, and 15N accumulation in the extractable organic matter can be related to the significant content of "heavy" microbial N in extractable organic N pool.

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Держатели документа:
Lomonosov Moscow State Univ, Moscow 119991, Russia.
Russian Acad Sci, Siberian Branch, Sukachev Inst Forest, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Makarov, M., I; Malysheva, T., I; Menyailo, O., V; Russian Science FoundationRussian Science Foundation (RSF) [16-14-10208]

    ИЗМЕНЕНИЕ МИКРОБИОЛОГИЧЕСКИХ И ФИЗИКО-ХИМИЧЕСКИХ СВОЙСТВ ПОЧВ ПОСЛЕ ПОЖАРОВ В СОСНОВЫХ И БЕРЕЗОВЫХ ЛЕСАХ ЦЕНТРАЛЬНЫХ РАЙОНОВ ЗАБАЙКАЛЬСКОГО КРАЯ
[Текст] / А. В. Богородская, Е. А. Кукавская, О. П. Каленская, Л. В. Буряк // Почвоведение. - 2023. - № 11. - С. 1418-1436, DOI 10.31857/S0032180X23600245 . - ISSN 0032-180X
   Перевод заглавия: CHANGES IN THE MICROBIOLOGICAL AND PHYSICO-CHEMICAL PROPERTIES OF SOILS AFTER FIRES IN PINE AND BIRCH FORESTS OF CENTRAL REGIONS OF THE ZABAIKAL KRAI
ГРНТИ

Аннотация: Исследованы микробиологические и некоторые физико-химические свойства дерново-подбуров иллювиально-железистых (Entic Rustic Podzols) сосновых и серогумусовых типичных легкосуглинистых почв (Umbrisols) производных березовых лесов центральных районов Забайкальского края. После пожаров в сосновых насаждениях в дерново-подбурах отмечается уменьшение содержания суммы обменных оснований, валового азота, подвижных соединений калия и фосфора, увеличение соотношения C : N; для березняков характерно увеличение названных показателей и сужение соотношения C : N в профиле серогумусовых типичных почв. Содержание гумуса в верхнем почвенном горизонте снижается только на свежей гари в сосняке после высокоинтенсивного пожара, тогда как на других участках оно увеличилось. Уменьшение кислотности почв отмечено на всех пройденных пожарами участках. Высокоинтенсивные пожары приводят к достоверному снижению содержания микробной биомассы и увеличению базального дыхания, а также к изменению структуры эколого-трофических групп микроорганизмов в профиле почв до глубины 10 см минерального горизонта. Низкоинтенсивные пожары затрагивают в основном подстилку. Коэффициент qCO2 увеличивался в 2–5 раз после пожаров в подстилке и в 1.5–2 раза в гумусовом горизонте только после высокоинтенсивных пожаров. На свежих гарях в сосняках значительно сокращались запас микробной биомассы и микробная продукция CO2 до глубины 10 см минеральной части почвенных профилей. На остепненном участке, сформировавшемся после воздействия пожаров в сосняке, и в березняке после пожара высокой интенсивности в гумусовом горизонте запас углерода микробной биомассы сокращался на 15–20%, а микробная продукция СО2 увеличивалась на 10–20%. Рассматриваемая послепожарная трансформация структурно-функциональных параметров микробоценоза почв и снижение на 20–40% суммарных запасов углерода микробной биомассы на всех участках предопределяют длительный период восстановления почв после пожаров в светлохвойных и лиственных насаждениях центральных районов Забайкальского края.
The microbiological and some physico-chemical properties of illuvial-ferruginous soddy-podburs (Entic Rustic Podzols) soils in Scots pine forests and gray-humic typical light loamy soils (Umbrisols) in secondary birch forests of the central regions of the Zabaikal krai have been studied. Fires in soddy-podburs pine forests resulted in decrease in the total exchangeable basis, total nitrogen, mobile forms of potassium and phosphorus, and in increase in the proportion of C : N; while in birch forests, on the contrary, an increase of the mentioned indicators and a narrowing of the C : N proportion in the gray-humic typical soils were observed. The content of humus in the upper soil horizon decreases only in recently burned Scots pine forests after a high-severity fire, while in other sites it increases. A decrease in the soil acidity was observed at all burned sites. High-severity fires lead to a significant decrease in the content of microbial biomass and the intensity of basal respiration, as well as to a change in the structure of ecological and trophic groups of microorganisms in the soils up to a depth of 10 cm of the mineral horizon, while low-severity fires mainly affect the duff. The qCO2 coefficient increased 2–5 times after fires in the duff and 1.5–2 times in the humus horizon only after high-severity fires. In recently burned Scots pine forests, the storage of microbial biomass and microbial production of carbon dioxide significantly decreased up to a depth of 10 cm of the mineral soil layer. In the steppe site formed after the impact of fires in the pine forest, and in the birch forest after a high-severity fire, in the humus horizon the carbon storage of microbial biomass decreased by 15–20%, and the microbial production of CO2 increased by 10–20%, predetermining the predominance of mineralization processes. The considered post-fire transformation of the structural and functional parameters of soil microbiocenosis, as well as a 20–40% decrease in the total carbon storage of microbial biomass in the soils of all sites demonstrate a long recovery period of soils after fires in light coniferous and deciduous forests of the central regions of the Zabaikal krai.

РИНЦ

Держатели документа:
ИЛ СО РАН : 660036, Красноярск, Академгородок, 50, стр. 28

Доп.точки доступа:
Кукавская, Елена Александровна; Kukavskaya, Elena Alexandrovna; Каленская, О.П.; Kalenskaya O.P.; Буряк, Людмила Викторовна; Buryak L.V.; Bogorodskaya, Anna Viktorovna