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	Effects of land use type and incubation temperature on greenhouse gas emissions from Chinese and Canadian soils
	Lang, Man1,2; Cai, Zucong2; Chang, Scott X.1
刊名	JOURNAL OF SOILS AND SEDIMENTS
	2011
卷号	11期号:1页码:15-24
关键词	CH(4) CO(2) Land use type N(2)O Temperature
ISSN号	1439-0108
DOI	10.1007/s11368-010-0260-0
通讯作者	Chang, Scott X.(scott.chang@ales.ualberta.ca)
英文摘要	Purpose Land use type is an important factor influencing greenhouse gas emissions from soils, but the mechanisms involved in affecting potential greenhouse gas (GHG) emissions in different land use systems are poorly understood. Since the northern regions of Canada and China are characterized by cool growing seasons, GHG emissions under low temperatures are important for our understanding of how soil temperature affects soil C and N turnover processes and associated greenhouse gas emissions in cool temperate regions. Therefore, we investigated the effects of temperature on the emission of N(2)O, CO(2), and CH(4) from typical forest and grassland soils from China and Canada. Materials and methods The soils were incubated in the laboratory at 10 degrees C and 15 degrees C under aerobic conditions for 15 days. Results and discussion The results showed that land use type had a large impact on greenhouse gas emissions. The N(2)O emissions were significantly higher in grassland than in forest soils, while CO(2) emissions were higher in forest than in grassland soils. Grassland soils were weak sources of CH(4) emission, while forest soils were weak sinks of atmospheric CH(4). The global warming potential of forest soils was significantly greater than that of grassland soils. Soil pH, C/N ratio, and soluble organic carbon concentrations and clay content were dominant factors influencing the emissions of N(2)O and CO(2), respectively. Increasing temperature from 10 degrees C to 15 degrees C had no effects on CH(4) flux, but significantly increased N(2)O emissions for all studied soils. The same pronounced effect was also found for CO(2) emission from forest soils. Conclusions Indications from this study are that the effects of land use type on the source-sink relationship and rates of GHG emissions should be taken into consideration when planning management strategies for mitigation of greenhouse gas emissions in the studied region, and temperature changes must be taken into account when scaling up point-or plot-based N(2)O and CO(2) flux data to the landscape level due to large spatial and temporal variations of temperature that exist in the field. The reader is cautioned about the limitation with incubation studies on a limited number of samples/locations, and care need to be exercised to extrapolate the result to field conditions.
收录类别	SCI
WOS关键词	NITROUS-OXIDE PRODUCTION ; AMMONIA-OXIDIZING BACTERIA ; METHANE OXIDATION ; ORGANIC-MATTER ; WATER-CONTENT ; FOREST SOILS ; CONIFEROUS FOREST ; MANAGED GRASSLAND ; CARBON-DIOXIDE ; CH4 PRODUCTION
WOS研究方向	Geology ; Agriculture
WOS类目	Geosciences, Multidisciplinary ; Soil Science
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000286527400003
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2558964
专题	南京土壤研究所
通讯作者	Chang, Scott X.
作者单位	1.Univ Alberta, Dept Renewable Resources, Edmonton, AB T6G 2E3, Canada 2.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Lang, Man,Cai, Zucong,Chang, Scott X.. Effects of land use type and incubation temperature on greenhouse gas emissions from Chinese and Canadian soils[J]. JOURNAL OF SOILS AND SEDIMENTS,2011,11(1):15-24.
APA	Lang, Man,Cai, Zucong,&Chang, Scott X..(2011).Effects of land use type and incubation temperature on greenhouse gas emissions from Chinese and Canadian soils.JOURNAL OF SOILS AND SEDIMENTS,11(1),15-24.
MLA	Lang, Man,et al."Effects of land use type and incubation temperature on greenhouse gas emissions from Chinese and Canadian soils".JOURNAL OF SOILS AND SEDIMENTS 11.1(2011):15-24.

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