Different tree species have dissimilar capacities to sequester soil organic carbon (SOC). Deciduous broadleaved trees show the most stable increase in SOC stock after afforestation than other tree species, while sempervirent conifer trees show the lowest rate of SOC stock change. Sempervirent broadleaved trees show the greatest increase in SOC stock 20 years after afforestation. The rate at which soil organic carbon (SOC) stock changes after afforestation varies considerably with the tree species. A better understanding of the role of tree species in SOC change dynamic is needed to evaluate the SOC sequestration potential of afforestation programs. The aim of this paper is to identify the dissimilar rates at which different tree species sequester SOC, following afforestation. We complete a meta-analysis with 544 data points from 261 sites in 90 papers. We group tree species into decidious broadleved, sempervirent broadleaved and sempervirent conifer. We use standardization and/or extrapolation methods to standardize soil depths. Statistical analysis test the main effects of tree species and their interactions with previous land use and plantation age on SOC stock change after afforestation. Deciduous broadleaved trees show a stable increase in SOC stock, and are especially suited for afforestation of grassland or soils with high initial SOC. Sempervirent broadleaved afforestation results in loss of SOC stock in young stands, but greater SOC stock in mature stands. Sempervirent conifer trees show the lowest rate of SOC stock change, but are suitable for nutrient-poor soil. The results emphasize the importance of considering tree species when estimating SOC stock change, in particular when carbon sequestration is an objective of afforestation programs.

中文翻译：

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落叶阔叶树、半生阔叶树和针叶树种造林后土壤有机碳储量变化的荟萃分析

不同的树种具有不同的固存土壤有机碳 (SOC) 的能力。与其他树种相比，落叶阔叶树在造林后的 SOC 储量增长最稳定，而半熟针叶树的 SOC 储量变化率最低。Sempervirent 阔叶树在造林 20 年后显示出最大的 SOC 储量增长。植树造林后土壤有机碳 (SOC) 储量变化的速度因树种而异。需要更好地了解树种在 SOC 变化动态中的作用，以评估造林计划的 SOC 封存潜力。本文的目的是确定不同树种在造林后封存 SOC 的不同速率。我们使用 90 篇论文中的 261 个站点的 544 个数据点完成了荟萃分析。我们将树种分为落叶阔叶树、长叶阔叶树和长叶针叶树。我们使用标准化和/或外推法来标准化土壤深度。统计分析检验了树种及其与先前土地利用和种植年龄的相互作用对造林后 SOC 库变化的主要影响。落叶阔叶树的 SOC 储量稳定增加，特别适用于草地或初始 SOC 高的土壤造林。Sempervirent 阔叶造林导致年轻林分 SOC 储量损失，但成熟林分中 SOC 储量增加。Sempervirent 针叶树的 SOC 库变化率最低，但适用于营养贫乏的土壤。