卧龙亚高山主要森林植被类型土壤碳汇研究

Study on Soil Labile Organic Carbon Under Some Main Forest Types in Wolong Nature Reserve,China

利用野外实际调查数据对四川卧龙亚高山9种主要森林植被类型土壤总有机碳含量、碳密度及其剖面分布和土壤活性有机碳含量、碳密度及其剖面分布进行了分析,结果表明：在调查区域9种典型森林植被类型总有机碳含量为15.39-41.30 g/kg,总有机碳密度为14.00-25.95 kg/m^2,土壤有机碳含量排序为冷、铁杉暗针叶林〉云杉暗针叶林〉冷杉红桦混交林〉亚高山草甸〉落叶阔叶林〉灌木林〉高山柳、落叶松混交林〉落叶松人工林〉落羽杉人工林。活性有机碳含量为4.85-23.14 g/kg,活性有机碳密度为4.29-10.55 kg/m^2。活性有机碳储量排序为云杉林〉灌木林〉亚高山草甸〉混交林〉落叶阔叶林〉人工林。研究结果还表明,卧龙亚高山主要森林植被类型土壤碳储量较高、碳库质量较好,有明显的碳蓄积,是一个较大的＂汇＂。

Aims nine forest tyeps, including Taxodium distichum Rich plantation （TD）, Larix potaninii Batalin plantation （LG）, subalpine desieiduous broad-leaved forest （SR）, subalpine shrubbery （SQ）, Sakux cupularis Rehd and Larix potaninii Batalin mixed forest （SL）, Abies fabric Crai and Betula albo-sinensis Burk mixed forest （AB）, Picea asperata Mast dark coniferous forest （PS）, Abies fabric Craib and Tsuga chinensis Pritz dark coniferous forest （TA） and subalpine meadow （BS）, in Wolong natural reserve, Sichuan, China, were investigated; and the total soil carbon content and active organic carbon content and their carbon density and distribution were analyzed. The result showed, in the investigated area, the soil carbon content and density ranged from 15.39 g/kg to 41.30 g/kg and 14.00 kg/m^2 to 25.95 kg/m^2, respectively; the soil carbon content of 9 forest types were ordered： TA 〉 PS 〉 AB 〉 BS 〉 SR 〉 SQ 〉 SL 〉 LG〉TG. Otherwise, the soil active organic carbon content and density ranged from 4.85 g/kg to 23. 14 g/kg and 4.29 kg/m^2 to 10.55 kg/m^2 , respectively. The active organic carbon content of forest types were order： PS 〉 SQ 〉 BS 〉 subalpine mixed forest 〉 SR 〉 subalpine plantation. Consequently, these data indicated both the quality and quantity of carbon stock were in a good condition.