Identifying cost-competitive greenhouse gas mitigation potential of French agriculture
Identifying cost-competitive greenhouse gas mitigation potential of French agriculture
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DOI：
10.1016/j.envsci.2017.08.003
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发表时间：
2017-11-01
影响因子：
6
通讯作者：
Chemineau, Philippe
中科院分区：
文献类型：
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作者：
Pellerin, Sylvain;Bamiere, Laure;Chemineau, Philippe
农业、林业和其他土地利用部门占全球人为温室气体排放量的24%（每年10-12 Pg CO（2）e），同时也有相应的减缓机会。一个科学小组采用审议方法确定了10项技术措施，包括26项减少法国农业温室气体排放的次级措施。比较了它们的减排潜力和成本。拟议的措施涉及氮管理、增加土壤和生物量碳储存的管理做法、牲畜饮食以及农场的能源生产和消费。结果表明，总的减排潜力可以分为三个部分。累积减排潜力的三分之一对应于可以负技术成本实施的次级措施。这些次级措施侧重于提高氮肥、动物饲料和能源等投入物的使用效率。第二个三分之一是具有中等成本的子措施（<25每公吨避免的CO（2）e）。这些次级措施要求对种植制度进行具体投资或改变，但增加的费用或收入减少可通过其他费用的减少或生产其他适销产品而得到部分补偿。其余的三分之一是高成本的次级措施（> 25每公吨避免的CO（2）e）。这些需要没有直接经济回报的投资、购买特定投入、投入专门的劳动时间或涉及生产损失。假设具有加和性，到2030年，累积减排量为每年32.3 Tg CO（2）e，但根据目前的清单规则计算时，仅为10 Tg（即目前农业排放量的10%）。这项研究证实，农业部门存在显着的减排潜力，其中三分之二的潜力成本较低甚至为负。这一数字可能被低估，因为它是基于当前农业系统的现状。结果还强调，需要升级库存规则，以便减少排放的努力可以占。
The agriculture, forestry and other land use sector are responsible for 24% (10-12 Pg CO(2)e per year) of anthropogenic greenhouse gas (GHG) emissions worldwide, with concomitant opportunities for mitigation. A scientific panel used deliberative methods to identify ten technical measures comprising 26 sub-measures to reduce GHG emissions from agriculture in France. Their abatement potential and cost are compared. The proposed measures concern nitrogen (N) management, management practices that increase carbon stocks in soils and biomass, livestock diets, and energy production and consumption on farms. Results show that the total abatement potential can be divided into three parts. One third of the cumulated abatement potential corresponds to sub-measures that can be implemented at a negative technical cost. These sub-measures focus on increased efficiency in input use including N fertilisers, animal feed and energy. The second third are sub-measures with moderate cost (< (sic)25 per metric Mg of avoided CO(2)e). These sub-measures require specific investments or changes to cropping systems, but additional costs or lower incomes are partially compensated for by a reduction in other costs or by the production of other marketable products. The remaining third are high-cost sub-measures (> (sic)25 per metric Mg of avoided CO(2)e). These require investment with no direct financial return, the purchase of particular inputs, dedicated labour time or involve production losses. Assuming additivity, the cumulated abatement is 32.3 Tg CO(2)e per year in 2030, but only 10 Tg (i.e. 10% of current agricultural emissions) when calculated under current inventory rules. This study confirms that a significant abatement potential exists in the agricultural sector, with two thirds of this potential at low or even negative cost. This is likely to be an underestimated as it is based on a status quo of the current agricultural system. Results also emphasise the need to upgrade inventory rules so that efforts to reduce emissions can be accounted for.