Greenhouse gas emissions from conventional and organic cropping systems in Spain. II. Fruit tree orchards
Greenhouse gas emissions from conventional and organic cropping systems in Spain. II. Fruit tree orchards
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DOI：
10.1007/s13593-014-0265-y
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发表时间：
2015-04-01
影响因子：
7.3
通讯作者：
Alonso, Antonio
中科院分区：
文献类型：
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作者：
Aguilera, Eduardo;Guzman, Gloria;Alonso, Antonio
果树园对地中海农业，特别是西班牙的农业具有历史和经济重要性。果园有潜力通过封存碳（C）和提供可再生燃料来减缓全球变暖。事实上，关于有机实践的好处的信息很少。因此，我们分析了42对有机和传统的多年生作物系统，包括柑橘，亚热带树木，其他果树，树，葡萄园和橄榄，使用生命周期评估（LCA）的温室气体贡献。评估是基于管理信息的访谈，并涉及土壤固碳，具体的地中海N2 O排放因子，并考虑副产品的估计。结果显示，有机种植与传统种植相比，以面积为基础，温室气体排放量平均减少56%。以产品为基础，温室气体排放量平均减少了39%。这些研究结果主要解释了土壤中的C螯合，这是由于反过来更高的C输入覆盖种植和合并修剪残留物。
Fruit tree orchards have a historical and economic importance for Mediterranean agriculture, notably in Spain. Fruit tree orchards have the potential to mitigate global warming by sequestrating carbon (C) and providing renewable fuels. Actually, there is few information on the benefits of organic practices. Therefore, we analyzed the greenhouse gas contribution of 42 pairs of organic and conventional perennial cropping systems, including citrus, subtropical trees, other fruit trees, treenuts, vineyards, and olives, using life-cycle assessment (LCA). The assessment was based on management information from interviews and involved the estimation of soil carbon sequestration, specific Mediterranean N2O emission factors, and the consideration of coproducts. Results show on average a 56 % decrease of greenhouse gas emissions under organic versus conventional cropping, on an area basis. On a product basis, greenhouse gas emissions decreased by 39 % on average. These findings are explained mainly by C sequestration in soils, which is due in turn to higher C inputs by cover cropping and incorporation of pruning residues.