三亚地区芒果园生态系统碳储量及其分布特征

Carbon Storage and Distribution in Mango Plantation Ecosystems in Sanya

[目的]研究三亚地区芒果园生态系统各组分的生物量、碳含量、碳储量及其分布特征。[方法]分别应用平均木法、样方收获法和分层取样法采样,并测定芒果园生态系统乔木层、草本及凋落物层和土壤层生物量及碳含量,计算其碳储量。[结果]三亚地区芒果园生态系统总碳储量为91.72 t/hm2,其中乔木层、草本及凋落物层和土壤层碳储量分别为16.17、0.95和74.60 t/hm2,分别占总碳储量的17.63%、1.04%和81.33%;乔木层各器官碳储量大小为树叶>树枝>树根>树干>果实;随土壤层深度的增加,碳储量逐渐降低。[结论]三亚地区芒果园生态系统固碳潜力较大;系统碳储量主要位于土壤层,乔木层碳储量以树叶和树枝较多,草本及凋落物层碳储量较低。

[ Objective] The aim was to study biomass, carbon concentration, carbon storage and distribution in mango plantation ecosystems in Sanya. [ Method] Using the methods of average sample tree, sample plot harvesting and profile sampling, biomass and carbon concentration of tree layer, litter layer and soil layer were determined, and carbon storage was calculated respectively. [ Result ] The total carbon storage of mango plantation ecosystems in Sanya was 91.72 t/hm2, with 16.17, 0.95 and 74.60 t/hm2, accounting for 17.63, 1.04 and 81.33% of the total in tree layer, litter layer and soil layer, respectively. The carbon storage in plant organs was in order as leaf 〉 branch 〉 root 〉 stem 〉 fruit, and was decreased with increasing depth of soil. [ Conclusion] Mango plantation ecosystem in Sanya has a significant potential in car- bon sequestration. Soil layer accounted for the largest part of the total carbon storage. Leaf and branch had more carbon storage in tree. Litter layer had less carbon storage in mango plantation ecosystems in Sanya.