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Effects of warming and changing precipitation rates on soil respiration over two years in a desert steppe of northern China
Liu, Tao; Xu, Zhen-Zhu; Hou, Yan-Hui; Zhou, Guang-Sheng
2016
发表期刊PLANT AND SOIL
ISSN0032-079X
卷号400期号:1-2页码:15-27
摘要Soil respiration (R (s)) has become a central issue in global carbon cycle research. In this study, we determined the seasonal changes in soil carbon efflux and the underlying mechanism with regard to the effects of abiotic and biotic factors in a degraded steppe ecosystem. A warming treatment and a control, and three watering levels were applied using a free air temperature increase facility. R (s) was measured throughout the year, and soil nutrition properties, as well as microbial biomass carbon were determined over the growing season. R (s) rates were significantly higher during the growing season than the non-growing season; however, the warming treatment led to a marked increase in R (s) in the winter. Soil temperature and R (s) were described by an exponential function with a Q (10) of 1.92 (R (2) = 0.74, p < 0.01); root respiration (21.9 %) was lower than heterotrophic respiration (78.1 %). Soil organic carbon, soil moisture, root biomass, and soil ammonium-N were determined to be driving R (s) during the growing season. The most important factor was soil organic carbon content in the 0-10 cm soil layer, with soil moisture showing little direct effect on R (s). Soil environmental variables including temperature, moisture, nutrition status, root growth, and soil microbial activity might co-regulate soil carbon emission, which would be considered critical in assessing the carbon balance under climatic change in arid areas.
关键词Changing precipitation Climate change Desert steppe Free air temperature increase Soil respiration Warming
学科领域Agronomy ; Plant Sciences ; Soil Science
DOI10.1007/s11104-015-2705-0
收录类别SCI
语种英语
WOS关键词MICROBIAL RESPIRATION ; CLIMATE-CHANGE ; CO2 EFFLUX ; TEMPERATURE ; MANIPULATION ; NITROGEN ; WATER ; VARIABILITY ; RESPONSES ; ECOSYSTEM
WOS研究方向Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号WOS:000371276000002
出版者SPRINGER
文献子类Article
出版地DORDRECHT
EISSN1573-5036
资助机构China Special Fund for Meteorological Research in the Public Interest (Major projects) [GYHY201506001-3] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31170456] ; Strategic Priority Research Program-Climate Change: Carbon Budget and Related Issues of the Chinese Academy of SciencesChinese Academy of Sciences [XDA05050408]
作者邮箱xuzz@ibcas.ac.cn ; gszhou@ibcas.ac.cn
引用统计
被引频次:43[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ibcas.ac.cn/handle/2S10CLM1/25107
专题植被与环境变化国家重点实验室
作者单位1.[Liu, Tao
2.Xu, Zhen-Zhu
3.Hou, Yan-Hui
4.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
5.Chinese Acad Meteorol Sci, Beijing 100081, Peoples R China
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GB/T 7714
Liu, Tao,Xu, Zhen-Zhu,Hou, Yan-Hui,et al. Effects of warming and changing precipitation rates on soil respiration over two years in a desert steppe of northern China[J]. PLANT AND SOIL,2016,400(1-2):15-27.
APA Liu, Tao,Xu, Zhen-Zhu,Hou, Yan-Hui,&Zhou, Guang-Sheng.(2016).Effects of warming and changing precipitation rates on soil respiration over two years in a desert steppe of northern China.PLANT AND SOIL,400(1-2),15-27.
MLA Liu, Tao,et al."Effects of warming and changing precipitation rates on soil respiration over two years in a desert steppe of northern China".PLANT AND SOIL 400.1-2(2016):15-27.
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