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

[Text] / O. V. Menyailo, B. . Huwe // J. Plant Nutr. Soil Sci.-Z. Pflanzenernahr. Bodenkd. - 1999. - Vol. 162, Is. 5. - P533-538, DOI 10.1002/(SICI)1522-2624(199910)162:5533::AID-JPLN5333.3.CO;2-2. - Cited References: 17 . - 6. - ISSN 1436-8730РУБ Agronomy + Plant Sciences + Soil Science

Аннотация: To clarify the influence of tree species on N2O emissions, soil chemical properties, initial concentrations of denitrifying enzymes and dynamics of N2O emissions were studied in the laboratory under standardized conditions in soil samples from artificially afforested spots with spruce, birch, pine, aspen, larch, cedar and under grass as control. 26 years of tree development caused changes not only in soil chemistry but also in persistence and dynamics of denitrifying enzymes. Total amount of N2O release correlated more with the initial status of N2O-reductase than with N2O-producing enzymes. C:N ratio was the main chemical factor explaining variation of N2O emission between species. At equal level of atmospheric N-deposition, N2O release will increase in the order: grassland < larch < pine < spruce < cedar < aspen < birch. These data may be useful to predict N2O losses from forest ecosystems in Siberia with different dominant tree species.

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Держатели документа:
RAS, SB, Inst Forest, Krasnoyarsk 660036, Russia
Univ Bayreuth, Dept Soil Phys, D-95440 Bayreuth, Germany

Доп.точки доступа:
Menyailo, O.V.; Huwe, B...

[Text] / O. V. Menyailo, B. A. Hungate // Glob. Biogeochem. Cycle. - 2006. - Vol. 20, Is. 3. - Ст. GB3025, DOI 10.1029/2005GB002527. - Cited References: 47 . - 10. - ISSN 0886-6236РУБ Environmental Sciences + Geosciences, Multidisciplinary + Meteorology & Atmospheric Sciences

Аннотация: Measuring the stable isotope composition of nitrous oxide ( N(2)O) evolved from soil could improve our understanding of the relative contributions of the main microbial processes ( nitrification and denitrification) responsible for N(2)O formation in soil. However, interpretation of the isotopic data in N(2)O is complicated by the lack of knowledge of fractionation parameters by different microbial processes responsible for N(2)O production and consumption. Here we report isotopic enrichment for both nitrogen and oxygen isotopes in two stages of denitrification, N(2)O production and N(2)O reduction. We found that during both N(2)O production and reduction, enrichments were higher for oxygen than nitrogen. For both elements, enrichments were larger for N(2)O production stage than for N(2)O reduction. During gross N(2)O production, the ratio of delta(18)O- to-delta(15)N differed between soils, ranging from 1.6 to 2.7. By contrast, during N(2)O reduction, we observed a constant ratio of delta(18)O- to-delta(15)N with a value near 2.5. If general, this ratio could be used to estimate the proportion of N(2)O being reduced in the soil before escaping into the atmosphere. Because N(2)O- reductase enriches N(2)O in both isotopes, the global reduction of N(2)O consumption by soil may contribute to the globally observed isotopic depletion of atmospheric N(2)O.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Inst Forest, Krasnoyarsk 660036, Russia
No Arizona Univ, Dept Biol Sci, Flagstaff, AZ 86011 USA
No Arizona Univ, Merriam Powell Ctr Environm Res, Flagstaff, AZ 86011 USA

Доп.точки доступа:
Menyailo, O.V.; Hungate, B.A.

[Text] / P. . Dijkstra [et al.] // Eur. J. Soil Sci. - 2006. - Vol. 57, Is. 4. - P468-475, DOI 10.1111/j.1365-2389.2006.00793.x. - Cited References: 36 . - 8. - ISSN 1351-0754РУБ Soil Science

Аннотация: The availability of C and N to the soil microbial biomass is an important determinant of the rates of soil N transformations. Here, we present evidence that changes in C and N availability affect the N-15 natural abundance of the microbial biomass relative to other soil N pools. We analysed the N-15 natural abundance signature of the chloroform-labile, extractable, NO3-, NH4+ and soil total N pools across a cattle manure gradient associated with a water reservoir in semiarid, high-desert grassland. High levels of C and N in soil total, extractable, NO3-, NH4+ and chloroform-labile fractions were found close to the reservoir. The delta N-15 value of chloroform-labile N was similar to that of extractable (organic + inorganic) N and NO3- at greater C availability close to the reservoir, but was N-15-enriched relative to these N-pools at lesser C availability farther away. Possible mechanisms for this variable N-15-enrichment include isotope fractionation during N assimilation and dissimilation, and changes in substrate use from a less to a more N-15-enriched substrate with decreasing C availability.

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No Arizona Univ, Dept Biol Sci, Flagstaff, AZ 86011 USA
RAS, Inst Forest SB, Krasnoyarsk 660036, Russia
No Arizona Univ, Colorado Plateau Stable Isotope Lab, Flagstaff, AZ 86011 USA
No Arizona Univ, Sch Forestry, Flagstaff, AZ 86011 USA
No Arizona Univ, Merriam Powell Ctr Environm Res, Flagstaff, AZ 86011 USA

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Dijkstra, P...; Menyailo, O.V.; Doucett, R.R.; Hart, S.C.; Schwartz, E...; Hungate, B.A.

/ 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 1556-195XРУБ 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]