Arid
DOI10.1016/j.agee.2007.03.001
Soil carbon dynamics in Canadian Agricultural Ecoregions: Quantifying climatic influence on soil biological activity
Bolinder, M. A.; Andren, O.; Katterer, T.; de Jong, R.; VandenBygaart, A. J.; Angers, D. A.; Parent, L.-E.; Gregorich, E. G.
通讯作者Bolinder, M. A.
来源期刊AGRICULTURE ECOSYSTEMS & ENVIRONMENT
ISSN0167-8809
EISSN1873-2305
出版年2007
卷号122期号:4页码:461-470
英文摘要

Climate is the major determinant of soil biological activity, including the decomposition rates of soil organic carbon (SOC) components. The objective of this study was to estimate the influence of climate on SOC dynamics, using long-term standard weather station data for Canadian Agricultural Ecoregions and the Introductory Carbon Balance Model for regional applications (ICBMregion). Mean daily temperature, total precipitation and potential evapotranspiration data were used in pedotransfer, soil water balance and biological activity functions to calculate a climate factor, r(e-clim), used to describe both inter- (1970-1999 data, daily r(e-clim)) and intra-annual variation (1903-2000 data, mean annual r(e-clim)) of the effects of climate on SOC decomposition rates across the country. When r(e-clim) = 1.0 the SOC decomposition rate is equal to that at a reference site in Central Sweden: when it is < 1.0 the relative SOC decomposition rate is lower, and when it is > 1.0 it is higher. The results show that the cool and humid eastern Canadian Agricultural Ecoregions are characterized by higher SOC decomposition rates (average r(e-clim) = 1.20), compared to the semi-arid regions of western Canada (average r(e-clim) = 0.95). In other words, more C input is needed to maintain a certain SOC level in eastern than in western Canada. Inter-annual variation (the difference between minimum and maximum values) in r(e-clim) for a given agricultural ecoregion was approximate to +/- 20%. The patterns of variation in intra-annual r(e-clim) values differed between Agricultural Ecoregions: for eastern Canada r(e-clim) reached a peak of approximate to 3.5 in mid-summer, and that of western Canada peaked at approximate to 2.5. This concept of r(e-clim) was tested and used in other climate zones such as northern Europe and Sub-Saharan Africa, and enabled us to integrate large data sets concerning climate and SOC dynamics and to characterize Canadian Agricultural Ecoregions by one variable, r(e-clim). (c) 2007 Elsevier B.V All rights reserved.


英文关键词biological activity climate Canadian agroecosystems decomposition rates soil organic carbon ICBMregion
类型Article
语种英语
国家Canada ; Sweden
收录类别SCI-E
WOS记录号WOS:000248773100006
WOS关键词ORGANIC-MATTER DECOMPOSITION ; GREENHOUSE-GAS EMISSIONS ; TEMPERATURE-DEPENDENCE ; EASTERN CANADA ; STORAGE ; MODELS ; WATER ; MANAGEMENT ; ROTATIONS ; MOISTURE
WOS类目Agriculture, Multidisciplinary ; Ecology ; Environmental Sciences
WOS研究方向Agriculture ; Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/153373
作者单位(1)Agregats Waterloo Inc, Stukeley Sud, PQ J0E 2J0, Canada;(2)SLU, Dept Soil Sci, SE-75007 Uppsala, Sweden;(3)Agr & Agri Food Canada, Eastern Cereal & Oilseed Res Ctr, Ottawa, ON K1A 0C6, Canada;(4)Agr & Agri Food Canada, Soils & Crops Res & Dev Ctr, Ste Foy, PQ G1V 2J3, Canada;(5)Univ Laval, Dept Soils & Agrifod Engn, Laval, PQ G1K 7P4, Canada
推荐引用方式
GB/T 7714
Bolinder, M. A.,Andren, O.,Katterer, T.,et al. Soil carbon dynamics in Canadian Agricultural Ecoregions: Quantifying climatic influence on soil biological activity[J],2007,122(4):461-470.
APA Bolinder, M. A..,Andren, O..,Katterer, T..,de Jong, R..,VandenBygaart, A. J..,...&Gregorich, E. G..(2007).Soil carbon dynamics in Canadian Agricultural Ecoregions: Quantifying climatic influence on soil biological activity.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,122(4),461-470.
MLA Bolinder, M. A.,et al."Soil carbon dynamics in Canadian Agricultural Ecoregions: Quantifying climatic influence on soil biological activity".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 122.4(2007):461-470.
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