We used a simulation model to analyse the effect of continuous-cover forestry on the carbon dioxide (CO₂) and methane (CH₄) emissions from nutrient-rich drained peatland sites in southern Finland. The simulation scenarios were constructed by varying harvesting interval and post-harvest basal area in a typical mature Norway spruce (Picea abies (L.) H. Karst.) stand. A process-based model of soil organic matter dynamics supplied with some additional empirical routines was used for calculation of emission due to decomposition of fresh litter and peat. The amount and chemical properties of litter inputs, as well as the hydrothermal conditions and the water table depth in the peat layer were used as predictors. We estimated the net ecosystem production as a difference between carbon sequestration in stand biomass and carbon losses due to decomposition of dead organic matter, and the net biome production as the net primary production minus losses due to harvesting. Simulations showed that the peatland forest acted as a carbon sink with low and middle harvest intensity, while it turned into a carbon source with high harvesting intensities. This was mostly because intensive harvesting raised the water table level, thus decreasing tree production and increasing soil methane emission. Carbon dioxide emissions from peat and litter, in turn, correlated negatively with the intensity of harvesting. Correlation of site carbon balance with harvested roundwood indicated that there is a significant trade-off between maintaining carbon in drained peatland forests and providing harvest revenues. The simulations provide novel results and fill a gap of knowledge in ecosystem responses to alternative management regimes in continuous-cover forestry on drained peatlands.

我们使用模拟模型分析了连续覆盖林业对芬兰南部富含营养的排水泥炭地地点的二氧化碳 (CO ₂ ) 和甲烷 (CH ₄ ) 排放的影响。模拟场景是通过改变典型成熟挪威云杉（Picea abies ）的收获间隔和收获后基础面积构建的(L.) H. Karst.) 站立。基于过程的土壤有机质动力学模型提供了一些额外的经验程序，用于计算由于新鲜凋落物和泥炭分解引起的排放。凋落物输入的数量和化学特性，以及泥炭层中的热液条件和地下水位深度被用作预测因子。我们将生态系统净产量估算为林分生物量的碳固存与死有机物质分解造成的碳损失之间的差异，而净生物群落产量则为净初级产量减去采伐造成的损失。模拟结果表明，泥炭地森林在中低采伐强度中充当碳汇，同时转变为高采伐强度的碳源。这主要是因为集约化采伐提高了地下水位，从而减少了树木产量并增加了土壤甲烷排放。泥炭和枯枝落叶的二氧化碳排放反过来与收获强度呈负相关。场地碳平衡与采伐圆木的相关性表明，在保持排水泥炭地森林中的碳与提供采伐收入之间存在显着的权衡。模拟提供了新的结果，并填补了在生态系统对排水泥炭地连续覆盖林业替代管理制度的反应方面的知识空白。场地碳平衡与采伐圆木的相关性表明，在保持排水泥炭地森林中的碳与提供采伐收入之间存在显着的权衡。模拟提供了新的结果，并填补了在生态系统对排水泥炭地连续覆盖林业替代管理制度的反应方面的知识空白。场地碳平衡与采伐圆木的相关性表明，在保持排水泥炭地森林中的碳与提供采伐收入之间存在显着的权衡。模拟提供了新的结果，并填补了在生态系统对排水泥炭地连续覆盖林业替代管理制度的反应方面的知识空白。