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肇庆市森林碳储量与碳密度动态变化研究
郑峰霖1, 古佳玮1, 卢德浩1, 黄华蓉2, 陈红跃3
1.华南农业大学;2.广东省岭南院勘察设计有限公司;3.华南农业大学林学与风景园林学院
摘要:
对肇庆市不同优势树种和林龄的森林类型的面积、 碳储量和碳密度进行比较分析, 结果表明: 2023 年肇庆市乔木林面积共计 70. 96 × 10 5 hm 2 , 碳储量共计 2 811. 92 × 10 5 tC; 相比于 2018 年乔木林面积 下降了 4. 02% , 但总碳储量增加了 11. 29% 。 中龄到成熟林龄阶段的马尾松 Pinus massoniana、 其他软阔 林和阔叶混交林是近 5 年肇庆市森林乔木碳储量增长的最大贡献者。 阔叶混交林、 针阔混交林和针叶混交 林是碳储存能力最强的森林类型; 且随着林龄的增加, 树种的碳密度普遍呈增大的趋势。 中龄林和近熟林 占肇庆市乔木林的 54. 8% , 预示着未来几十年肇庆市森林碳储量将迎来持续地增长; 其中, 近熟和成熟 林龄的阔叶混交林的碳密度在 2018—2023 年间的增幅最大, 具有较大的碳储存潜力。 此外, 肇庆市人工 林的面积和碳储量都约是天然林的 6 倍, 但人工林在单位面积上的碳储存能力和碳密度的增速却不如天然 林, 因此实行森林质量的精准提升工程来提高人工林在单位面积上的碳储存能力, 是有效提升肇庆市森林 碳储量和碳汇功能的主要途径。
关键词:  乔木林  碳储量  碳密度  林龄
DOI:
分类号:
基金项目:广东省林业科技创新项目 (2023KJCX001)。
Changes of Forest Carbon Storage and Carbon Density in Zhaoqing City
Zheng Fenglin,Gu Jiawei,Lu Dehao,Huang Huarong,Chen Hongyue
1.College of Forestry and Landscape Architecture,South China Agricultural University,Guangzhou;2.Guangdong Lingnanyuan Exploration and Desgin Co Ltd,Guangzhou
Abstract:
A comparative analysis of the area, carbon storage, and carbon density of different dominant tree species and forest ages in Zhaoqing city was conducted. The results showed that the total area of arboreal forests in Zhaoqing city was 70. 96 × 10 5 hm 2 , with a total carbon storage of 2 811. 92 × 10 5 tC in 2023. The middle-aged to mature stages of Pinus massoniana, other soft broad-leaved forests, and broad-leaved mixed forests were the largest contributors to the growth of forest arbor carbon storage in Zhaoqing city over the past five years. Broad-leaved mixed forests, needle-broad mixed forests, and coniferous mixed forests had the strongest carbon storage capacity; and as forest age increased, the carbon density of tree species generally showed an increasing trend. Middle-aged forests and near-mature forests accounted for 54. 8% of the arbor forests in Zhaoqing city, indicating that the forest carbon storage in Zhaoqing city would continue to grow over the next few decades. Among them, the carbon density of near-mature and mature broad-leaved mixed forests increased the most from 2018 to 2023, and had great potential for carbon storage. In addition, the area and carbon storage of artificial forests in Zhaoqing city were about 6 times that of natural forests, but the carbon storage capacity and carbon density growth rate of artificial forests per unit area were not as good as natural forests. Therefore, implementing precise improvement projects for forest quality to improve the carbon storage capacity of artificial forests per unit area was the main way to effectively increase the forest carbon storage and carbon sink function of Zhaoqing city.
Key words:  arboreal forest  carbon storage  carbon density  forest age