Owing to the increasing extension of land for livestock production, silvopastoral practices have been among the promising approaches to enhance carbon (C) sequestration. However, the extent of C sequestration in different silvopastoral systems (SPS) and their relationship with fine root production (FRP) is not well understood. The objective of this research was to evaluate the changes in C storage, FRP, and turnover in a part of tropical SPS. We evaluated above‐ and belowground C storage, FRP and turnover in live fences (LF), dispersed tree (DT) silvopasture, and compared these with open pasturelands (OP) in Southeastern Mexico. We applied the stock change approach to calculate biomass growth rates and the ingrowth monolith method for FRP. Biomass stocks in the same plots are re‐measured over time in the stock change approach. Woody biomass stocks differed significantly between SPS (DT: 37.2, LF: 9.8 Mg ha⁻¹) and the accumulation rates in both SPS were significantly higher than zero (0.2–2.2 Mg ha⁻¹ yr⁻¹). Soil organic carbon (SOC) contents were significantly higher in SPS (LF: 2.4%, DT: 3.1%) compared to OP (1.6%). FRP significantly differed between SPS (LF: 27.8, DT: 45.4, and OP: 9.4 g m⁻² yr⁻¹) and correlated positively with SOC content. Higher SOC reduced soil compaction in silvopastoral lands as indicated by lower soil bulk density. The results on C stocks change and fine root dynamics contribute to understanding C sequestration potential of tropical SPS, identifying ecologically sound strategies to mitigate greenhouse gases from the livestock sector, and aid restoration of ecosystem services for degraded pasturelands.

中文翻译：

---

热带林牧系统中的碳含量和优良的根系生成

由于越来越多的土地用于畜牧业生产，林牧方式已成为增强碳固存的有前途的方法之一。但是，人们对不同的农牧牧系统（SPS）中的碳固存程度及其与细根生产（FRP）的关系还没有很好的了解。这项研究的目的是评估热带SPS一部分中C储量，FRP和周转量的变化。我们评估了活动围栏（LF），分散树木（DT）植被的地上和地下C储量，FRP和周转量，并将其与墨西哥东南部的露天牧场（OP）进行了比较。我们应用了库存变化方法来计算生物量的增长率以及玻璃钢的内生整体法。相同地块中的生物量库存会随着时间的推移以库存变化方法重新测量。^-1），两个SPS中的累积速率均显着高于零（0.2-2.2 Mg ha ^-1 yr ^-1）。SPS中的土壤有机碳（SOC）含量显着高于OP（1.6％）（LF：2.4％，DT：3.1％）。FPS在SPS之间有显着差异（LF：27.8，DT：45.4，和OP：9.4 g m ^-2 yr ^-1）并与SOC含量呈正相关。较高的SOC降低了牧草土地的土壤压实，这表明土壤容重较低。关于碳储量变化和优良根系动态的结果有助于了解热带SPS的碳固存潜力，确定减轻畜牧业温室气体排放的生态合理策略，并有助于恢复退化牧场的生态系统服务。