土壤有机碳的剖面分布特征及其密度的估算方法研究——以我国东北地区为例

DISTRIBUTION PATTERN AND DENSITY CALCULATION OF SOIL ORGANIC CARBON IN PROFILE

土壤有机碳(C)库在全球变化研究中具有极其重要的地位,而土壤剖面中有机C分布特征及估算方法是精确计算土壤有机C库的前提。本文收集了《中国土种志》和东北3省土种志中有关的土壤剖面属性数据,建立以土壤有机C为主体的数据库,讨论了土壤剖面有机C的分布特征及土壤剖面不同分类单元下土壤有机C的估算方法,为合理和准确地估算土壤有机C密度及土壤有机C库提供科学依据。

Significance of the organic carbon pool in the soil in the study of global change is well recognized. Characteristics of the distribution of organic carbon in soil profile and methods of its assessment are the premise for precise calculation of the pool in the soil. On the basis of the results of the second national soil survey in China, a soil-organic-carbon-based database was established, and characteristics of the distribution of organic carbon in soil profile and methods for assessing organic carbon in soils of different soil taxonomic units were discussed, thus providing a scientific basis for rational and accurate calculation of the density of soil organic carbon and organic carbon pool in the soil.