摘要
通过研究内蒙古锡林郭勒典型草原生态系统和青海海北高寒草甸生态系统的12种植物在不同升温条件下的碳同位素测试结果,讨论升温处理及其造成的轻微炭化对植物碳同位素组成的影响并分析其作用机理。升温处理对多数植物样品的碳同位素组成没有强烈影响,但也可能导致部分植物的碳同位素组成变重(尤其是当样品发生轻微炭化时),其分馏程度会因物种的不同而不同。
In this research, the δ^(13)C of the plants in Xilinguole and Haibei have been analyzed in order to illustrate the effect of oven-drying on δ^(13)C in plants. Samples of group B were dried at 50 ℃ for 12 h and then at 140 ℃ for 36 h, and samples of group A were dried at 50 ℃ for 12 h only. Most of the δ^(13)C values of group B are equal to the values of group A, except No.06 and No.09. This reflects that oven-drying has few effect on δ^(13)C in most plants. At the same time, carbon isotope discrimination that occurred in some kinds of plants indicates that the fractionation can be caused by oven-drying.
出处
《岩矿测试》
CAS
CSCD
2005年第1期23-25,30,共4页
Rock and Mineral Analysis
基金
国家自然科学基金(40302024)
中国博士后科学基金
