Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13868 |
Climate mitigation by dairy intensification depends on intensive use of spared grassland | |
Styles, David1; Gonzalez-Mejia, Alejandra1; Moorby, Jon2; Foskolos, Andreas2; Gibbons, James1 | |
2018-02-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2018 |
卷号 | 24期号:2页码:681-693 |
文章类型 | Article |
语种 | 英语 |
国家 | Wales |
英文摘要 | Milk and beef production cause 9% of global greenhouse gas (GHG) emissions. Previous life cycle assessment (LCA) studies have shown that dairy intensification reduces the carbon footprint of milk by increasing animal productivity and feed conversion efficiency. None of these studies simultaneously evaluated indirect GHG effects incurred via teleconnections with expansion of feed crop production and replacement suckler-beef production. We applied consequential LCA to incorporate these effects into GHG mitigation calculations for intensification scenarios among grazing-based dairy farms in an industrialized country (UK), in which milk production shifts from average to intensive farm typologies, involving higher milk yields per cow and more maize and concentrate feed in cattle diets. Attributional LCA indicated a reduction of up to 0.10 kg CO(2)e kg(-1) milk following intensification, reflecting improved feed conversion efficiency. However, consequential LCA indicated that land use change associated with increased demand for maize and concentrate feed, plus additional suckler-beef production to replace reduced dairy-beef output, significantly increased GHG emissions following intensification. International displacement of replacement suckler-beef production to the "global beef frontier" in Brazil resulted in small GHG savings for the UK GHG inventory, but contributed to a net increase in international GHG emissions equivalent to 0.63 kg CO(2)e kg(-1) milk. Use of spared dairy grassland for intensive beef production can lead to net GHG mitigation by replacing extensive beef production, enabling afforestation on larger areas of lower quality grassland, or by avoiding expansion of international (Brazilian) beef production. We recommend that LCA boundaries are expanded when evaluating livestock intensification pathways, to avoid potentially misleading conclusions being drawn from "snapshot" carbon footprints. We conclude that dairy intensification in industrialized countries can lead to significant international carbon leakage, and only achieves GHG mitigation when spared dairy grassland is used to intensify beef production, freeing up larger areas for afforestation. |
英文关键词 | agriculture climate change consequential life cycle assessment land sparing life cycle assessment sustainable intensification |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000423994700040 |
WOS关键词 | GREENHOUSE-GAS EMISSIONS ; LIFE-CYCLE ASSESSMENT ; LAND-USE CHANGE ; CONSEQUENTIAL LCA ; CARBON FOOTPRINT ; MILK-PRODUCTION ; BIOENERGY PRODUCTION ; LIVESTOCK SECTOR ; FARMING SYSTEMS ; AGRICULTURE |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17009 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Bangor Univ, Sch Environm Nat Resources & Geog, Bangor, Gwynedd, Wales; 2.Aberystwyth Univ, IBERS, Aberystwyth, Dyfed, Wales |
推荐引用方式 GB/T 7714 | Styles, David,Gonzalez-Mejia, Alejandra,Moorby, Jon,et al. Climate mitigation by dairy intensification depends on intensive use of spared grassland[J]. GLOBAL CHANGE BIOLOGY,2018,24(2):681-693. |
APA | Styles, David,Gonzalez-Mejia, Alejandra,Moorby, Jon,Foskolos, Andreas,&Gibbons, James.(2018).Climate mitigation by dairy intensification depends on intensive use of spared grassland.GLOBAL CHANGE BIOLOGY,24(2),681-693. |
MLA | Styles, David,et al."Climate mitigation by dairy intensification depends on intensive use of spared grassland".GLOBAL CHANGE BIOLOGY 24.2(2018):681-693. |
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