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

[Text] / L. S. Shugalei, E. F. Vedrova // Biol. Bull. - 2004. - Vol. 31, Is. 2. - P200-208, DOI 10.1023/B:BIBU.0000022477.99224.fb. - Cited References: 20 . - 9. - ISSN 1062-3590РУБ Biology

Аннотация: The pools of nitrogen in different blocks of forest ecosystems and its cycle in the soil are considered. It is shown that the bulk of nitrogen concentrates in the soil and dead organic matter (necromass) of an ecosystem. The nitrogen pool of forest litters and soils consists by 83-93% of the inert compounds that cannot be involved in the biological cycle. Mineralization of organic nitrogen-containing substances in the litters and soils usually yields ammonium as an end product. The amount of nitrogen mineralized over the growing season is partially expended for annual plant increment (30-65%) and immobilization (12-17%), with its large proportion being found in the soil.

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Держатели документа:
Russian Acad Sci, Sukachev Inst Forest, Siberian Div, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Shugalei, L.S.; Vedrova, E.F.

[Text] / A. S. Prokushkin [et al.] // Russ. J. Ecol. - 2006. - Vol. 37, Is. 4. - P225-232, DOI 10.1134/S1067413606040023. - Cited References: 35 . - 8. - ISSN 1067-4136РУБ Ecology

Аннотация: Productivity of the moss cover and necromass accumulation in the litter of a sphagnum larch forest have been estimated on the basis of tree age. It has been shown that the total carbon stock in the litter of a 100-year-old stand, including organic matter not destroyed by fire, exceeds the corresponding value for the tree stand itself by more than,an order of magnitude. The accumulation of organic matter on the soil surface inhibits the growth of larch. In particular, this factor impairs hydrothermal conditions in the soil and causes a rise of the permafrost table; as a consequence, lower layers of the root system die off.

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Держатели документа:
Russian Acad Sci, Siberian Div, Sukachev Inst Forest, Krasnoyarsk 660036, Russia
Max Planck Inst Biogeochem, D-07701 Jena, Germany

Доп.точки доступа:
Prokushkin, A.S.; Knorre, A.A.; Kirdyanov, A.V.; Schulze, E.D.

/ J. Cui, Z. Zhu, X. Xu [et al.] // Soil Biol. Biochem. - 2020. - Vol. 142. - Ст. 107720, DOI 10.1016/j.soilbio.2020.107720 . - ISSN 0038-0717
Аннотация: The impact of increasing amounts of labile C input on priming effects (PE) on soil organic matter (SOM) mineralization remains unclear, particularly under anoxic conditions and under high C input common in microbial hotspots. PE and their mechanisms were investigated by a 60-day incubation of three flooded paddy soils amended with13C-labeled glucose equivalent to 50–500% of microbial biomass C (MBC). PE (14–55% of unamended soil) peaked at moderate glucose addition rates (i.e., 50–300% of MBC). Glucose addition above 300% of MBC suppressed SOM mineralization but intensified microbial N acquisition, which contradicted the common PE mechanism of accelerating SOM decomposition for N-supply (frequently termed as “N mining”). Particularly at glucose input rate higher than 3 g kg?1 (i.e., 300–500% of MBC), mineral N content dropped on day 2 close to zero (1.1–2.5 mg N kg?1) because of microbial N immobilization. To cope with the N limitation, microorganisms greatly increased N-acetyl glucosaminidase and leucine aminopeptidase activities, while SOM decomposition decreased. Several discrete peaks of glucose-derived CO2 (contributing >80% to total CO2) were observed between days 13–30 under high glucose input (300–500% of MBC), concurrently with CH4 peaks. Such CO2 dynamics was distinct from the common exponential decay pattern, implicating the recycling and mineralization of 13C-enriched microbial necromass driven by glucose addition. Therefore, N recycling from necromass was hypothesized as a major mechanism to alleviate microbial N deficiency without SOM priming under excess labile C input. Compound-specific 13C-PLFA confirmed the redistribution of glucose-derived C among microbial groups, i.e., necromass recycling. Following glucose input, more than 4/5 of total 13C-PLFA was in the gram-negative and some non-specific bacteria, suggesting these microorganisms as r-strategists capable of rapidly utilizing the most labile C. However, their 13C-PLFA content decreased by 70% after 60 days, probably as a result of death of these r-strategists. On the contrary, the 13C-PLFA in gram-positive bacteria, actinomycetes and fungi (K-strategists) was initially minimal but increased by 0.5–5 folds between days 2 and 60. Consequently, the necromass of dead r-strategists provided a high-quality C–N source to the K-strategists. We conclude that under severe C excess, N recycling from necromass is a much more efficient microbial strategy to cover the acute N demand than N acquisition from the recalcitrant SOM. © 2020 Elsevier Ltd

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Держатели документа:
Key Laboratory of Agro-ecological Processes in Subtropical Region & Changsha Research Station for Agricultural and Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Hunan, 410125, China
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Gongdong, 510640, China
Jiangsu Provincial Key Laboratory for Bioresources of Coastal Saline Soils, Jiangsu Coastal Biological Agriculture Synthetic Innovation Center, Yancheng Teachers' University, Yancheng, 224002, China
Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
School of Environment, Natural Resources & Geography, Bangor University, Gwynedd, LL57 2UW, United Kingdom
Department of Agricultural Soil Science, Department of Soil Science of Temperate Ecosystems, University of G?ttingen, G?ttingen, Germany
Institute of Environmental Sciences, Kazan Federal University, Kazan, 420049, Russian Federation
Agro-Technological Institute, RUDN University, Moscow, 117198, Russian Federation
Departamento de Ciencias Quimicas y Recursos Naturales, Universidad de La Frontera, Temuco, Chile
VN Sukachev Institute of Forest, SB-RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Cui, J.; Zhu, Z.; Xu, X.; Liu, S.; Jones, D. L.; Kuzyakov, Y.; Shibistova, O.; Wu, J.; Ge, T.

/ J. Cui, Z. K. Zhu, X. L. Xu [et al.] // Soil Biol. Biochem. - 2020. - Vol. 142. - Ст. 107720, DOI 10.1016/j.soilbio.2020.107720. - Cited References:80. - The study was supported by the National Key Research and Development Program of China (2017YFD0800104), the National Natural Science Foundation of China (41430860, 41771337, 41977093 and 31872695), State Key Laboratory of Organic Geochemistry, GIGCAS (SKLOG-201728), Hunan Province Base for Scientific and Technological Innovation Cooperation (2018WK4012), the Youth Innovation Team Project of Institute of Subtropical Agriculture, Chinese Academy of Sciences (2017QNCXTD_GTD), NSFC-RFBR joint project (N 19-54-53026) and Innovation Groups of National Natural Science Foundation of Hunan Province (2019JJ10003). We thank the Public Service Technology Center, Institute of Subtropical Agriculture, Chinese Academy of Sciences for technical assistance. The publication was supported by the Government Program of Competitive Growth of Kazan Federal University and with the support of the "RUDN University program 5-100." . - ISSN 0038-0717РУБ Soil Science

Аннотация: The impact of increasing amounts of labile C input on priming effects (PE) on soil organic matter (SOM) mineralization remains unclear, particularly under anoxic conditions and under high C input common in microbial hotspots. PE and their mechanisms were investigated by a 60-day incubation of three flooded paddy soils amended with(13)C-labeled glucose equivalent to 50-500% of microbial biomass C (MBC). PE (14-55% of unamended soil) peaked at moderate glucose addition rates (i.e., 50-300% of MBC). Glucose addition above 300% of MBC suppressed SOM mineralization but intensified microbial N acquisition, which contradicted the common PE mechanism of accelerating SOM decomposition for N-supply (frequently termed as "N mining"). Particularly at glucose input rate higher than 3 g kg(-1) (i.e., 300-500% of MBC), mineral N content dropped on day 2 close to zero (1.1-2.5 mg N kg(-1)) because of microbial N immobilization. To cope with the N limitation, microorganisms greatly increased N-acetyl glucosaminidase and leucine aminopeptidase activities, while SOM decomposition decreased. Several discrete peaks of glucose-derived CO2 (contributing >80% to total CO2) were observed between days 13-30 under high glucose input (300-500% of MBC), concurrently with CH4 peaks. Such CO2 dynamics was distinct from the common exponential decay pattern, implicating the recycling and mineralization of C-13-enriched microbial necromass driven by glucose addition. Therefore, N recycling from necromass was hypothesized as a major mechanism to alleviate microbial N deficiency without SOM priming under excess labile C input. Compound-specific C-13-PLFA confirmed the redistribution of glucose-derived C among microbial groups, i.e., necromass recycling. Following glucose input, more than 4/5 of total C-13-PLFA was in the gram-negative and some non-specific bacteria, suggesting these microorganisms as r-strategists capable of rapidly utilizing the most labile C. However, their C-13-PLFA content decreased by 70% after 60 days, probably as a result of death of these r-strategists. On the contrary, the C-13-PLFA in gram-positive bacteria, actinomycetes and fungi (K-strategists) was initially minimal but increased by 0.5-5 folds between days 2 and 60. Consequently, the necromass of dead r-strategists provided a high-quality C-N source to the K-strategists. We conclude that under severe C excess, N recycling from necromass is a much more efficient microbial strategy to cover the acute N demand than N acquisition from the recalcitrant SOM.

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Держатели документа:
Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Hunan, Peoples R China.
Chinese Acad Sci, Inst Subtrop Agr, Changsha Res Stn Agr & Environm Monitoring, Changsha 410125, Hunan, Peoples R China.
Chinese Acad Sci, State Key Lab Organ Geochem, Guangzhou Inst Geochem, Gongdong 510640, Peoples R China.
Yancheng Teachers Univ, Jiangsu Prov Key Lab Bioresources Coastal Saline, Jiangsu Coastal Biol Agr Synthet Innovat Ctr, Yancheng 224002, Peoples R China.
Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China.
Bangor Univ, Sch Environm Nat Resources & Geog, Bangor LL57 2UW, Gwynedd, Wales.
Univ Gottingen, Dept Agr Soil Sci, Dept Soil Sci Temperate Ecosyst, Gottingen, Germany.
Kazan Fed Univ, Inst Environm Sci, Kazan 420049, Russia.
RUDN Univ, Agrotechnol Inst, Moscow 117198, Russia.
Univ La Frontera, Dept Ciencias Quim & Recursos Nat, Temuco, Chile.
RAS, SB, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Cui, Jun; Zhu, Zhenke; Xu, Xingliang; Liu, Shoulong; Jones, Davey L.; Kuzyakov, Yakov; Shibistova, Olga; Wu, Jinshui; Ge, Tida; National Key Research and Development Program of China [2017YFD0800104]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China [41430860, 41771337, 41977093, 31872695]; State Key Laboratory of Organic Geochemistry, GIGCAS [SKLOG-201728]; Hunan Province Base for Scientific and Technological Innovation Cooperation [2018WK4012]; Youth Innovation Team Project of Institute of Subtropical Agriculture, Chinese Academy of Sciences [2017QNCXTD_GTD]; NSFC-RFBR joint project [N 19-54-53026]; Innovation Groups of National Natural Science Foundation of Hunan Province [2019JJ10003]; Government Program of Competitive Growth of Kazan Federal University; RUDN University program 5-100