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Abstract：
Approximately a third of all annual greenhouse gas emissions globally are directly or indirectly associated with the food system, and over a half of these are linked to livestock production. In temperate oceanic regions, such as the UK, most meat and dairy is produced in extensive systems based on pasture. There is much interest in the extent to which such grassland may be able to sequester and store more carbon to partially or completely mitigate other greenhouse gas emissions in the system. However, answering this question is difficult due to context-specificity and a complex and sometimes inconsistent evidence base. This paper describes a project that set out to summarize the natural science evidence base relevant to grassland management, grazing livestock and soil carbon storage potential in as policy-neutral terms as possible. It is based on expert appraisal of a systematically assembled evidence base, followed by a wide stakeholders engagement. A series of evidence statements (in the appendix of this paper) are listed and categorized according to the nature of the underlying information, and an annotated bibliography is provided in the electronic supplementary material.
摘要：
全球每年约有三分之一的温室气体排放量与粮食系统直接或间接相关。其中一半以上与畜牧业生产有关。在温带海洋地区，比如英国，大多数肉类和奶制品是在基于牧场的广泛系统中生产的。人们对这样的草地能够在多大程度上隔离和储存更多的碳以部分或完全减轻系统中的其他温室气体排放非常感兴趣。然而,由于上下文特异性和复杂且有时不一致的证据基础，因此很难回答这个问题。本文介绍了一个项目，该项目旨在总结与草地管理相关的自然科学证据基础，尽可能以政策中立的方式放牧牲畜和土壤碳储存潜力。它基于对系统集合的证据库的专家评估，其次是广泛的利益相关者参与。一系列的证据陈述（在本文的附录中）被列出，并根据基础信息的性质进行分类，并且在电子补充材料中提供了注释的参考书目。
