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Diverse soil respiration responses to extreme precipitation patterns in arid and semiarid ecosystems
Zhao, Man1; Guo, Shengli1,2; Wang, Rui1,2
2021-07-01
Source PublicationAPPLIED SOIL ECOLOGY
ISSN0929-1393
Volume163Pages:9
Corresponding AuthorWang, Rui(ruiwang0212@126.com)
AbstractProjected increases in the frequency and magnitude of extreme precipitation profoundly impact terrestrial ecosystems. However, the response of soil respiration to changing precipitation patterns has not been systematically investigated, especially in arid and semi-arid areas. Precipitation amounts of 300 and 600 mm (T300 and T600) were set to simulate normal and extremely wet summers, respectively, and were individually conducted by wetting soils in a series of sub-events?10 or 100 mm (P10, P100)?over equal time intervals. Maize straw (1300 kg ha-1) and N fertilization (200 kg N ha-1) were applied in parallel to extend our simulation to natural cropland conditions. Soil respiration pulses were observed after T300-P100, and inhibited effects occasionally occurred 1 day after T600-P100, primarily because frequent and harsh storms in T600-P100 induced saturation stress on soil respiration. Cumulative soil respiration in T600 was greater than that in T300, owing to prolonged suitable water conditions for soil respiration. Similarly, for the same total precipitation amount, P100 produced 40?44% more soil respiration than P10. Applying N and maize straw did not change response trends but produced different magnitudes of response to changing precipitation patterns. Maize straw significantly stimulated soil respiration, and this effect became more evident in P100 with improved water conditions, producing a 122?185% increase in cumulative soil respiration. Nitrogen slightly inhibited soil respiration; this effect was enhanced when maize straw was also added but was insignificant. Cumulative soil respiration was significantly correlated with ?-Dglucosidase and soil microbial biomass carbon content. Such soil respiration responses highlight the need to accurately account for soil respiration contributions when projecting global carbon cycling in future climate scenarios.
KeywordExtreme precipitation patterns Soil respiration Water stress N and maize straw
DOI10.1016/j.apsoil.2021.103928
WOS KeywordWATER-USE EFFICIENCY ; LOESS PLATEAU ; MICROBIAL COMMUNITIES ; HETEROTROPHIC RESPIRATION ; CROP RESIDUE ; CARBON ; PULSES ; RAINFALL ; DESERT ; CHINA
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41830751] ; China Postdoctoral Science Foundation[2018M643755]
Funding OrganizationNational Natural Science Foundation of China ; China Postdoctoral Science Foundation
WOS Research AreaAgriculture
WOS SubjectSoil Science
WOS IDWOS:000647783900018
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/162914
Collection中国科学院地理科学与资源研究所
Corresponding AuthorWang, Rui
Affiliation1.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
Recommended Citation
GB/T 7714
Zhao, Man,Guo, Shengli,Wang, Rui. Diverse soil respiration responses to extreme precipitation patterns in arid and semiarid ecosystems[J]. APPLIED SOIL ECOLOGY,2021,163:9.
APA Zhao, Man,Guo, Shengli,&Wang, Rui.(2021).Diverse soil respiration responses to extreme precipitation patterns in arid and semiarid ecosystems.APPLIED SOIL ECOLOGY,163,9.
MLA Zhao, Man,et al."Diverse soil respiration responses to extreme precipitation patterns in arid and semiarid ecosystems".APPLIED SOIL ECOLOGY 163(2021):9.
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