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首页> 外文期刊>Agricultural Systems >Accounting for multi-functionality of sheep farming in the carbon footprint of lamb: a comparison of three contrasting Mediterranean systems.
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Accounting for multi-functionality of sheep farming in the carbon footprint of lamb: a comparison of three contrasting Mediterranean systems.

机译：在羔羊的碳足迹中解释绵羊饲养的多功能性：三种不同的地中海系统的比较。

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Intensifying animal production is generally advocated to mitigate greenhouse gases emissions associated with production of animal-source food. Sheep farming systems (SFSs) in Spain are generally considered to be pasture-based and extensive, but large differences in input utilization, land use and intensification level exist. Their environmental impacts, therefore, are expected to differ also. We used life cycle assessment (LCA) to evaluate greenhouse gases (GHGs) emissions of three contrasting meat-sheep farming systems in Spain, which differed in their degree of intensification (reproduction rate, land use and grazing management). The GHGs emissions of these systems varied from 19.5 to 25.9 kg CO 2-eq per kg of lamb live weight, or 39.0-51.7 kg CO 2-eq per kg of lamb meat, with highest values referring to the pasture-based livestock system. In addition to meat, however, these SFSs also provide other services to society (e.g. public goods such as biodiversity and landscape conservation). We valued these services for each SFSs based on agri-environmental subsidies of the EU and used farm economic values to allocate GHGs emissions of SFSs between meat and cultural ecosystem services. When accounting for multifunctionality, GHGs emission per kg of lamb live weight among the SFSs was reversed: with lowest values for the pasture-based system (13.9 kg CO 2-eq per kg of lamb live weight) and highest for zero-grazing system (19.5 kg CO 2-eq per kg of lamb live weight). A comparison of GHGs emissions among SFSs should account for the multifunctionality of pasture-based livestock systems.
机译：通常提倡增加动物生产以减轻与动物源性食品生产相关的温室气体排放。西班牙的绵羊饲养系统（SFSs）通常被认为是以牧场为基础的，范围广泛，但是投入利用，土地利用和集约化水平存在很大差异。因此，它们对环境的影响也将有所不同。我们使用生命周期评估（LCA）来评估西班牙三种不同的肉羊养殖系统的温室气体（GHGs）排放，其集约化程度不同（繁殖率，土地利用和放牧管理）。这些系统的温室气体排放量从每公斤羔羊活重19.5到25.9千克CO 2当量，或每千克羔羊肉39.0-51.7千克CO 2当量，最高值是基于牧场的牲畜系统。但是，除了肉类之外，这些SFS还为社会提供其他服务（例如，生物多样性和景观保护等公共产品）。我们根据欧盟的农业环境补贴对每个SFS的服务进行了评估，并使用农场经济价值在肉类和文化生态系统服务之间分配SFS的温室气体排放。在考虑多功能性时，SFS中每千克羔羊活重的温室气体排放被颠倒：基于牧场的系统最低值（每千克羔羊活重13.9千克二氧化碳当量当量），零放牧系统最高（每千克羔羊活重19.5千克二氧化碳当量）。 SFS之间GHG排放的比较应说明基于牧场的牲畜系统的多功能性。

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