Arid
DOI10.1016/j.apsoil.2016.02.010
Short-term respiration responses to drying-rewetting in soils from different climatic and land use conditions
Sawada, Kozue1,3; Funakawa, Shinya1; Kosaki, Takashi2
通讯作者Sawada, Kozue
来源期刊APPLIED SOIL ECOLOGY
ISSN0929-1393
EISSN1873-0272
出版年2016
卷号103页码:13-21
英文摘要

Many surface soils, including those that have rarely experienced dry conditions, may experience more frequent and/or intense drying-rewetting (DRW) events in the future. Such DRW events are likely to induce large and sudden CO2 pulses derived from increased substrate availability owing to their release from non-biomass soil organic C (SOC) and microbial biomass C (MBC); however, few studies have investigated respiration rates following DRW at high time resolutions (e.g., 1 h) or in soils from humid areas. In this study, DRW effects on the dynamics of respiration rates at hourly intervals for 12 h and substrate-induced respiration (SIR) rates were investigated. Soils previously subjected to different DRW frequencies were collected from forest and arable or grassland sites in Japan (humid), Thailand (semi-humid) and Kazakhstan (semi-arid). The relatively humid Japanese and Thai soils were further subjected to five DRW cycles in the laboratory to compare the effects of the first and fifth DRW. Respiration rates after the first and fifth DRW and first DRW to the Japanese and Thai forest soil, respectively, were not fitted by models employing exponentially-decaying functions, and were initially similar to SIR rates. In such cases, C-saturated conditions for surviving microbes would occur probably because of increased substrate availability following release from dead MBC, suggesting the importance of incorporating microbial parameters into SOC models. Respiration rates after DRW to other samples decreased exponentially to a constant rate. In such cases, when increases in the labile and stable C pools by DRW were estimated by the respiration kinetics, the labile C pool would be primarily derived from dead MBC. (C) 2016 Elsevier B.V. All rights reserved.


英文关键词Drying-rewetting Humid climate Microbial biomass carbon Substrate-induced respiration Respiration pulse
类型Article
语种英语
国家Japan
收录类别SCI-E
WOS记录号WOS:000375123100002
WOS关键词MICROBIAL BIOMASS-C ; BACTERIAL-GROWTH ; THRESHOLD CONCENTRATION ; N-MINERALIZATION ; ORGANIC-MATTER ; CARBON-DIOXIDE ; GLUCOSE ; PULSES ; MICROORGANISMS ; AVAILABILITY
WOS类目Soil Science
WOS研究方向Agriculture
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/191362
作者单位1.Kyoto Univ, Grad Sch Agr, Sakyo Ku, Oiwake Cho, Kyoto 6068502, Japan;
2.Tokyo Metropolitan Univ, Grad Sch Urban Environm Sci, 1-1 Minami Osawa, Hachioji, Tokyo 1920397, Japan;
3.Tokyo Univ Agr & Technol, Inst Symbiot Sci & Technol, 2-24-16 Nakacho, Koganei, Tokyo 1848588, Japan
推荐引用方式
GB/T 7714
Sawada, Kozue,Funakawa, Shinya,Kosaki, Takashi. Short-term respiration responses to drying-rewetting in soils from different climatic and land use conditions[J],2016,103:13-21.
APA Sawada, Kozue,Funakawa, Shinya,&Kosaki, Takashi.(2016).Short-term respiration responses to drying-rewetting in soils from different climatic and land use conditions.APPLIED SOIL ECOLOGY,103,13-21.
MLA Sawada, Kozue,et al."Short-term respiration responses to drying-rewetting in soils from different climatic and land use conditions".APPLIED SOIL ECOLOGY 103(2016):13-21.
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