黔中地区三种林分土壤有机碳库比较

Soil Carbon Pool under Three Types of Vegetation in Central Guizhou

对黔中地区三种林分土壤有机碳、易氧化有机碳、稳定态有机碳及碳库管理指数进行研究。结果表明,3种林分0-60 cm土壤有机碳、易氧化有机碳、稳定态有机碳都表现为阔叶林>杉木林>马尾松林,马尾松林土壤有机碳、易氧化有机碳、稳定态有机碳比阔叶林分别减少了13.9%、37.0%、7.9%,杉木林比阔叶林分别减少了8.9%、24.7%、4.8%;各林分土壤有机碳、易氧化有机碳、稳定态有机碳都随着土层深度的增加而降低,阔叶林随土层加深变化幅度较大;土壤碳库管理指数也表现为阔叶林>杉木林>马尾松林。

The contents of soil organic carbon(SOC),readily oxidation carbon(ROC),non readily oxidation carbon(NROC) and carbon pool management index(CPMI) under three types of vegetation in central Guizhou were studied.The results showed that the order of the content of SOC,ROC and NROC in 0-60 cm soil of different vegetations were broad-leaved forest > Chinese fir > masson pine.The contents of SOC,ROC and NROC in soil of masson pine were less than 13.9%,37.0% and 7.9% of that of broad-leaved forest respectively.The contents of SOC,ROC and NROC of Chinese fir were respectively less than 8.9%,24.7%,and 4.8% of that of broad-leaved forest.The content of SOC,ROC and NROC of three vegetations decreased with the soil layer deepening,and the change degree of the broad-leaved forest was larger than that of masson pine and Chinese fir.CPMI of three vegetations followed the order: broad-leaved forest > Chinese fir > masson pine.