亚热带3种阔叶林造林模式植被层碳储量及其分配特征

童红卫; 吴文娟; 吕胤凯; 王伟; 吴初平; 刘子琪; 焦洁洁

doi:10.3969/j.issn.1001-3776.2025.01.002

亚热带3种阔叶林造林模式植被层碳储量及其分配特征

Carbon Storage and Distribution Pattern of Vegetation Layers in 3 Afforestation Models of Subtropical Broad-leaved Forests

摘要

摘要:
目的造林模式对人工林的生物量与碳储量有重要影响，研究不同造林模式固碳能力与潜力，可为亚热带人工林造林模式的选择与森林经营政策的制定提供理论基础与科学依据。
方法以浙江省龙泉市枫香树Liquidambar formosana纯林、木荷Schima superba纯林及木荷×杉木Cunninghamia lanceolata×其他阔叶树种混交林3种不同造林模式下的林分为研究对象，分析不同林分乔木层各组分的碳分布格局差异以及林分群落内各层次的碳分布格局差异。
结果木荷×杉木×其他阔叶树种混交林植被层的总碳储量为57.02 t·hm⁻²，显著高于枫香树纯林（37.22 t·hm⁻²）与木荷纯林（29.94 t·hm⁻²），其中混交林乔木层总碳储量为53.38 t·hm⁻²，显著高于枫香树纯林（33.07 t·hm⁻²）与木荷纯林（28.48 t·hm⁻²），但在林下地被层上，碳储量最高的则为枫香树纯林（4.15 t·hm⁻²），显著高于木荷纯林（1.46 t·hm⁻²）；在碳分配上，3种林分乔木层各组分中干材占比最高，介于42%～53%；3种林分植被层各组分中均以乔木层碳储量为最高，占各林分总碳储量的89%～95%，而在灌木层、草本层与凋落物层的碳分配比例上存在差异。
结论混交林相较于纯林碳储量更高，对森林资源的利用更加高效充分，固碳能力更强。

Abstract:
Objective Afforestation model has an important effect on biomass and carbon storage of plantation. The impact of afforestation models on the carbon sequestration capacity and potential of artificial forests, providing a theoretical basis and scientific basis for the selection of afforestation models and the formulation of forest management policies in subtropical forests.
Methods The carbon distribution pattern differences of each component in the tree layer and the carbon distribution pattern differences at different levels within the forest community were analyzed using three different afforestation models in a Liquidambar formosana stand, a Schima superba stand, and a mixed Schima superba × Cunninghamia lanceolata× other broad-leaved tree species stand in Longquan City, Zhejiang Province.
Results The results shows that the total carbon storage of the vegetation layer in the mixed Schima superba × Cunninghamia lanceolata× other broad-leaved tree species stand is 57.02 t·hm⁻² significantly higher than 37.22 t·hm⁻² in the Liquidambar formosana stand and 29.94 t·hm⁻² in the Schima superba stand. The total carbon storage of the tree layer in the mixed stand is 53.38 t·hm⁻², significantly higher than 33.07 t·hm⁻²in the Liquidambar formosana stand and 28.48 t·hm⁻²in the Schima superba stand. However, in the understory layer, the highest carbon storage is 4.15 t·hm⁻²in the Liquidambar formosana stand, significantly higher than the Schima superba stand at 1.46 t·hm⁻²; In terms of carbon allocation, trunk is the organ with the highest proportion in the tree layer of the three forest stands, ranging from 42% to 53%; Among the three forest stands vegetation layers components, the tree layer has the highest carbon storage, accounting for about 89% to 95% of the total carbon storage in each forest. However, there are differences in the carbon allocation ratios in the shrub layer, herbaceous layer, and litter layer.
Conclusion The mixed stand has higher carbon storage compared to the pure stands, and their utilization of forest resources is more efficient and sufficient.

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