In the modern era, Gmelina arborea plantations are a hotspot of future research because of their high carbon sequestration potential. The present work was conducted during 2018 to 2020 on a young unmanaged Gmelina farm to understand the ecosystem’s carbon and its dynamics. The study area was categorized into three age classes: ≤ 5, 5–10, and 10–15 years. In a plantation, Gmelina trees (10%) were randomly selected while other trees (90%) were also taken into the consideration for ecosystem carbon. A stratified random nested quadrate sampling method was adopted for analyzing other vegetation forms under study. Overall, 51 individual species in the studied Gmelina farm were found which includes 23 tree species, 7 shrub species, 16 herbs, 2 climbers, and 3 species of ferns. The estimated quantitative vegetation parameters and diversity indices indicate that the plant assemblages were heterogeneous with native diverse species evenly distributed with fairly higher densities, frequencies, and abundance. Herbs were the most important species followed by shrubs and trees. Consequently, with the increasing age of plantation, the richness of plant species increased. Soil properties were significantly influenced by the age of the plantation but exhibited no discreet trend. Total biomass density and total carbon density increased with increasing plantation age while no drastic variation was found in available soil organic carbon (SOC) because of insignificant variability in litter production. Total carbon, available SOC (up to 60 cm depth) and ecosystem carbon in the three age class plantations fell in the ranges of 54.51–59.91, 48.18–55.73, and 104.81–110.77 Mg ha⁻¹, respectively. The carbon sequestration potential of Gmelina arborea is higher compared to other reported species and highly supportive of converting unutilized agricultural landscapes to reduce the atmospheric carbon dioxide in future.

中文翻译：

---

喜马拉雅山东部山麓农业景观上的蜜饯人工林的林分结构，生物量和碳储量

在现代时代，由于其高的固碳潜力，Gmelina arborea人工林成为未来研究的热点。目前的工作是在2018年至2020年期间对一个年轻的未管理的Gmelina农场进行的，以了解生态系统的碳及其动态。研究区域分为三个年龄段：≤5、5-10和10-15岁。在一个人工林中，随机选择Gmelina树（占10％），而其他树（占90％）也考虑到了生态系统碳。采用分层随机嵌套四边形抽样方法分析正在研究的其他植被形式。总体而言，研究过的Gmelina中有51个物种农场发现了23种树木，7种灌木，16种草药，2种登山者和3种蕨类植物。估计的定量植被参数和多样性指数表明，植物组合是异质的，原生多样性物种分布均匀，密度，频率和丰度都较高。草药是最重要的物种，其次是灌木和树木。因此，随着人工林年龄的增加，植物种类的丰富性增加。土壤性质受种植年龄的影响很大，但没有明显的趋势。总生物量密度和总碳密度随种植年限的增加而增加，而在有效土壤有机碳（SOC）中未发现剧烈变化，因为凋落物生产中的变化不大。总碳^-1。与其他报道的物种相比，Gmelina arborea的碳固存潜力更高，并且高度支持转换未利用的农业景观以减少未来的大气二氧化碳。