DOI: 10.1111/gcb.14091
Scopus记录号: 2-s2.0-85043469725
论文题名: Cover crops mitigate direct greenhouse gases balance but reduce drainage under climate change scenarios in temperate climate with dry summers
作者: Tribouillois H. ; Constantin J. ; Justes E.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 6 起始页码: 2513
结束页码: 2529
语种: 英语
英文关键词: carbon
; catch crop
; evapotranspiration
; N2O
; simulation
; STICS model
; water balance
Scopus关键词: carbon
; catch crop
; climate change
; computer simulation
; cover crop
; drainage
; evapotranspiration
; greenhouse gas
; summer
; temperate environment
; water budget
; Europe
; France
英文摘要: Cover crops provide ecosystem services such as storing atmospheric carbon in soils after incorporation of their residues. Cover crops also influence soil water balance, which can be an issue in temperate climates with dry summers as for example in southern France and Europe. As a consequence, it is necessary to understand cover crops' long-term influence on greenhouse gases (GHG) and water balances to assess their potential to mitigate climate change in arable cropping systems. We used the previously calibrated and validated soil–crop model STICS to simulate scenarios of cover crop introduction to assess their influence on rainfed and irrigated cropping systems and crop rotations distributed among five contrasted sites in southern France from 2007 to 2052. Our results showed that cover crops can improve mean direct GHG balance by 315 kg CO2e ha−1 year−1 in the long term compared to that of bare soil. This was due mainly to an increase in carbon storage in the soil despite a slight increase in N2O emissions which can be compensated by adapting fertilization. Cover crops also influence the water balance by reducing mean annual drainage by 20 mm/year but increasing mean annual evapotranspiration by 20 mm/year compared to those of bare soil. Using cover crops to improve the GHG balance may help to mitigate climate change by decreasing CO2e emitted in cropping systems which can represent a decrease from 4.5% to 9% of annual GHG emissions of the French agriculture and forestry sector. However, if not well managed, they also could create water management issues in watersheds with shallow groundwater. Relationships between cover crop biomass and its influence on several variables such as drainage, carbon sequestration, and GHG emissions could be used to extend our results to other conditions to assess the cover crops' influence in a wider range of areas. © 2018 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110373
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: INRA, UMR 1248 AGIR, Castanet-Tolosan, France; CIRAD, UMR SYSTEM, Montpellier, France
Recommended Citation:
Tribouillois H.,Constantin J.,Justes E.. Cover crops mitigate direct greenhouse gases balance but reduce drainage under climate change scenarios in temperate climate with dry summers[J]. Global Change Biology,2018-01-01,24(6)