吉林西部盐碱化土壤碳酸盐的碳稳定同位素特征  

The Stable Carbon Isotopic Characteristics of Carbonates in Salini-alkani Soil in the West Jilin Province

作　　者：杨俊鹏[1] 胡克[2] 刘玉英[1] 

机构地区：[1]吉林大学地球科学学院,长春130061 [2]中国地质大学海洋学院,北京100083

出　　处：《吉林大学学报（地球科学版）》2006年第2期245-249,273,共6页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金项目(40201052)

摘　　要：对吉林西部盐碱化土壤的物理性状进行了实地调查，并对不同土地利用类型的土壤碳酸盐碳稳定同位素作了系统的测定。结果表明，研究区内盐碱地土壤碳酸盐的δ^13C值的变化趋势可以反映本区土壤盐碱化的进程。盐碱化土地在0～50cm的深度范围内，土壤碳酸盐的δ^13C值变化规律为：0～30cm深度内，土壤碳酸盐的δ^13C值随深度的增加而逐渐减小；在30～50cm范围内，如果有盐积层或碱积层的存在，则土壤碳酸盐的δ^13C值迅速增加。Through the field investigation of physical properties of the salini-alkani soil in West Jilin Province and the stable carbon isotopic analysis of carbonates in salini-alkani soil, the results show that the δ^13C value of the soil carbonates can reflect the developing tendency of the soil saliniation. In the shallow soil with the depth of 0-50 cm below the ground surface,the extent from 0 to 50 centimeters, the change of the δ^13C of the soil carbonate is positively related with the depth in the upper soil profile from 0-30 cm, but it will increase rapidly in the lower soil profile as the result of the existence of salined and alkali soil layer.

关 键 词：吉林西部 盐碱化土壤 土壤碳酸盐 碳稳定同位素 

分 类 号：X142[环境科学与工程—环境科学]