Carbon sequestration and storage in biomass is one of the most important measures to mitigate climate change. Mediterranean woody crops can sequestrate carbon in the biomass of their permanent structures for decades; however, very few studies have focused on an assessment of biomass and carbon sequestration in these types of crops. This study is the first to estimate above- and belowground biomass carbon stock in Mediterranean woody crops through a bottom-up approach in the NE Iberian Peninsula in 2013. Moreover, this is the first time that an assessment of the annual changes in carbon stock in the study area over a six-year period is presented. For this purpose, eight crop- and site-specific equations relating biomass or biometric variables to crop age were calculated. Most of the data were our own measurements, but unpublished data supplied from other authors as well as data from literature were also considered. Census of Agriculture data was used to scale results from individual data up to the municipality level at the regional scale. Results show that in woody cropland in NE Spain the total biomass carbon stock in 2013 was 5.48 Tg C, with an average value of 16.44 ± 0.18 Mg C ha⁻¹. Between 2013 and 2019, although there was a 2.8% mean annual decrease in the area covered by woody crops, the carbon stock in the biomass of these crops increased annually by 3.8% due to the growth of the remaining woody cropland. This new estimation of carbon stocks may contribute to better understand carbon balances and serve as a baseline to global inventories. It may also serve to assess and manage carbon storage as an ecosystem service provided by Mediterranean woody cropland for mitigating climate change and, in combination with adaptive strategies, for supporting a productive and resilient agro-food system.

生物质碳封存和储存是减缓气候变化的最重要措施之一。地中海木本作物可以在其永久结构的生物量中封存几十年的碳；然而，很少有研究侧重于评估这些类型作物的生物量和碳固存。这项研究是 2013 年首次在伊比利亚半岛东北部通过自下而上的方法估算地中海木本作物的地上和地下生物量碳储量。此外，这是第一次评估地中海木本作物的年度碳储量变化。介绍了六年期间的研究领域。为此，计算了将生物量或生物特征变量与作物年龄相关的八个作物和特定地点的方程。大部分数据是我们自己测量的，但也考虑了其他作者提供的未发表数据以及文献数据。农业普查数据用于将个人数据的结果扩展到区域范围内的市级。结果表明，2013 年西班牙东北部木本农田的总生物量碳储量为 5.48 Tg C，平均值为 16.44 ± 0.18 Mg C ha^-1。2013 年至 2019 年间，虽然木本作物覆盖面积年均减少 2.8%，但由于剩余木本农田的增长，这些作物生物量中的碳储量年均增加 3.8%。这种对碳储量的新估算可能有助于更好地了解碳平衡并作为全球清单的基准。它还可以用于评估和管理碳储存，作为地中海木本农田提供的一种生态系统服务，以缓解气候变化，并结合适应性战略，支持生产性和弹性的农业食品系统。