磨盘山云南松林碳储量及其分配格局

Carbon Storage and Distribution Pattern of Pinus yunnanensis Forest in Mopan Mountain

【目的】为合理估算滇中地区云南松林碳储量和分阶段实施云南松林碳管理提供基础数据。【方法】选取15、30和45a生云南松林为研究对象,对云南省玉溪市磨盘山不同林龄云南松(Pinus yunnanensis Franch)林碳储量及其分配格局特征进行了研究。【结果】不同林龄云南松含碳率为47.96%~49.19%,云南松不同器官的含碳率以树干最高,树根最低,树叶、树枝介于之间。不同林龄云南松土壤含碳率在0~60cm随着土层深度的增加而减小,云南松林植被层碳储量为9.14~149.63t/hm2,随着林龄的增大而增大。不同林龄云南松土壤碳储量为85.70~122.80t/hm2,随着土层深度的增加而降低,云南松林群落生态系统碳储量在103.74~267.96t/hm2范围,随群落林龄的增加呈增大趋势。【结论】乔木层和土壤层是森林生态系统的主要碳库,云南松具有巨大的固碳潜力。

[Objective] To provide basic data of carbon storage for carbon management in different stages of Pinus yunnanensis Forest in the middle region of Yunnan province, China. [Method] We selected 15, 30 and 45 a of P. yunnanensis Forest, located in Mopan mountain in Yuxi, as the research object to study its carbon storage and distribution pattern. [Results] Our results showed that the range of carbon content in different ages of P. yunnanensis was 47.64^--49.19~. The highest value of organic carbon content in different organs was detected in the trunk, the lowest accumulated in the root, such value in both leaves and twigs intermediated between them. Soil carbon content decreased with the increase of soil depth in the range of 0--60 cm in all ages of P. yunnanensis, the estimate of carbon storage of vegetation layer was 9.14--149.63 t/hm2 , which promoted further along with the increase of forest age. The soil carbon storage was between 85.7 and 122.80 t/hmz in the forest land of P. yunnanensis, displaying a decline trend with the increase of soil depth. The carbon storage of P. yunnanensis forest ecosystems was in the range of 103.74 --267. 96 t/hm2 , and showed an increase trend with the increase of forest age. [Conclusion] Car- bon storage in the tree layer and soil layer in combination accounts for the majority of carbon stor- age of the forest ecosystem, and exhibits a tremendous potential for carbon sequestration.