青藏高原土壤有机碳储量与密度分布

DISTRIBUTION CHARACTERISTICS OF SOIL ORGANIC CARBON STORAGE AND DENSITY ON THE QINGHAI-TIBET PLATEAU

采用全国第二次土壤普查数据结合作者的实测数据，利用1：100万土壤数据库对青藏高原土壤有机质层、土壤矿质层及整个剖面的土壤有机碳密度和土壤有机碳储量分别进行了估算。结果表明：青藏高原的平均土壤有机碳密度约为C7.2kg·m^-2，较前人的C8.01-19.05kg·m^-2全国平均土壤有机碳密度偏低。青藏高原总的土壤有机碳储量约为18.37Pg，其中有机质层土壤有机碳储量约占38．14％，矿质层土壤有机碳储量则占61．86％。

Based on the 1：1000000 scale soil database of the Qinghai-Tibet Plateau,the data from the second national soil survey and the data measured by the author, soil organic carbon storages and densities in the organic horizon, mineral horizon, and whole profile of the soil in the Qinghai-Tibet Plateau were estimated. It was shown that the average soil organic carbon density was estimated around C7.2kg·m^-2,a little lower compared with the national average soil organic carbon density, C8.01-19.05kg·m^-2 obtained by the previous researches, and the soil organic carbon storage about 18.37 Pg,of which 38.14% was stored in the organic horizon,and 61.86% in the mineral horizon.