Programa Institucional de Doctorado en Ciencias Agropecuarias y Forestales, Universidad Juárez del Estado de Durango, Durango, Durango, México.
Facultad de Ciencias Forestales y Ambientales, Universidad Juárez del Estado de Durango, Durango, Durango, México.
PeerJ. 2023 Feb 9;11:e14774. doi: 10.7717/peerj.14774. eCollection 2023.
Forest plantations and natural forests perform a relevant role in capturing CO and reducing greenhouse gas concentrations. The objective of this study was to compare the diameter increment, biomass and carbon accumulation in a plantation of and a naturally regenerated stand. The data were collected from 32 circular plots of 100 m (16 plots in the planted site and 16 in naturally regenerated area). At each plot, the diameter at the base (cm) and height (m) of all seedlings were measured using a Vernier and tape measure, and a seedling was destructively sampled collecting one cross-section at the base of the stump. The annual ring-width increment of each sampled seedling was recorded to obtain its diameter at the base and estimate annual aboveground biomass and carbon accumulation through allometric equations. The response variables were evaluated using mixed-effects ANOVA models. Results indicated that there were significant differences ( ≤ 0.05) on annual tree-ring width growth, biomass and carbon accumulation. The plantation seedlings showed significantly higher growth rates, biomass and carbon accumulation at most evaluated years. After 7 years of growth the lines of current annual increment (CAI) and mean annual increment (MAI) in basal diameter for both the plantation and the natural regeneration have not yet intersected. Both forest plantations and naturally regenerated stands of the studied tree species may be suitable alternatives to promote CO capture and increase timber production.
人工林和天然林在捕获 CO 和降低温室气体浓度方面发挥着重要作用。本研究的目的是比较种植林和自然再生林分的直径增量、生物量和碳积累。数据来自 32 个 100 米的圆形样地（种植区 16 个，自然再生区 16 个）。在每个样地中，使用游标卡尺和卷尺测量所有幼苗的基径（cm）和高度（m），并从树桩底部破坏性地采集一个样本。记录每个采样幼苗的年轮宽度增量，以获得基径，并通过异速方程估算年地上生物量和碳积累。使用混合效应 ANOVA 模型评估响应变量。结果表明，在年树木年轮宽度生长、生物量和碳积累方面存在显著差异（≤0.05）。在大多数评估年份，种植林的幼苗表现出更高的生长速度、生物量和碳积累。经过 7 年的生长，种植林和天然更新林的当前年增量（CAI）和基径年平均增量（MAI）线尚未相交。研究树种的人工林和天然林分都可能是促进 CO 捕获和增加木材产量的合适替代选择。
