Effect of experimental warming on soil respiration under conventional tillage and no-tillage farmland in the North China Plain
Tu, C; Li, FD; Qiao, YF; Zhu, N; Gu, CK; Zhao, X
2017
Source PublicationJOURNAL OF INTEGRATIVE AGRICULTURE
ISSN2095-3119
Volume16Issue:4Pages:967-979
AbstractUnderstanding the response of soil respiration to global warming in agro-ecosystem is crucial for simulating terrestrial carbon (C) cycle. We conducted an infrared warming experiment under conventional tillage (CT) and no-tillage (NT) farmland for winter wheat and summer maize rotation system in North China Plain (NCP). Treatments include CT with and without warming (CTW and CTN), NT with and without warming (NTW and NTN). The results indicated that warming had no significant effect on soil moisture in irrigated farmland of NCP (P>0.05). The elevated average soil temperature of 1.1-1.6 degrees C in crop growing periods could increase annual soil CO2 emission by 10.3% in CT filed (P>0.05), but significantly increase it by 12.7% in NT field (P<0.05), respectively. The disturbances such as plowing, irrigation and precipitation resulted in the obvious soil CO2 emission peaks, which contributed 36.6-40.8% of annual soil cumulative CO2 emission. Warming would enhance these soil CO2 emission peaks; it might be associated with the warming-induced increase of autotrophic respiration and heterotrophic respiration. Compared with un-warming treatments, dissolved organic carbon (DOC) and soil microbial biomass carbon (MBC) in warming treatments were significantly increased by 11.6-23.4 and 12.9-23.6%, respectively, indicating that the positive responses of DOC and MBC to warming in both of two tillage systems. Our study highlights that climate warming may have positive effects on soil C release in NCP in association with response of labile C substrate to warming.
SubtypeJournal
Keywordglobal warming conventional tillage no-tillage soil respiration dissolved organic carbon soil microbial biomass carbon
Subject AreaAgriculture
WOS Subject ExtendedAgriculture, Multidisciplinary
WOS KeywordCARBON-DIOXIDE EMISSIONS ; MICROBIAL BIOMASS ; PRECIPITATION PULSES ; COMMUNITY STRUCTURE ; TALLGRASS PRAIRIE ; ENZYME-ACTIVITIES ; TIBETAN PLATEAU ; FOREST SOIL ; RESPONSES ; WHEAT
Indexed BySCI
Language英语
WOS IDWOS:000399355200022
PublisherELSEVIER SCI LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44124
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Tu, C,Li, FD,Qiao, YF,et al. Effect of experimental warming on soil respiration under conventional tillage and no-tillage farmland in the North China Plain[J]. JOURNAL OF INTEGRATIVE AGRICULTURE,2017,16(4):967-979.
APA Tu, C,Li, FD,Qiao, YF,Zhu, N,Gu, CK,&Zhao, X.(2017).Effect of experimental warming on soil respiration under conventional tillage and no-tillage farmland in the North China Plain.JOURNAL OF INTEGRATIVE AGRICULTURE,16(4),967-979.
MLA Tu, C,et al."Effect of experimental warming on soil respiration under conventional tillage and no-tillage farmland in the North China Plain".JOURNAL OF INTEGRATIVE AGRICULTURE 16.4(2017):967-979.
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