摘要
δ13C方法是近年来用于土壤有机质动力学研究的一种新方法,该方法除了具有14C标记法的优点外,还具有无放射性,可以提供长期的标记,并能使所有的土壤有机质组分都能被均匀标记,相对经济、在实验地采样后直接进行研究等特殊优点,从而在土壤有机质及其组分的来源、周转和C3/C4植被的历史变化研究中得到广泛应用。随着该方法的迅速发展以及各种分析δ13C值技术的不断改进,δ13C方法在研究土壤过程特别是土壤碳循环中显示出新的活力。为了推动δ13C方法在国内土壤有机质研究中的应用,本文对影响土壤有机质δ13C值的因素、国内外近年来该方法在土壤有机质研究中的应用和δ13C值的分析方法作了较全面的综述。
The δ 13C method, which is a new technique for researching on soil organic matter (SOM) dynamics in recent years, possesses not only virtues of the radioactive 14C labeling methods, but also some specific merits. For instance, it is non-radioactive and long-term in labeling, and is able to evenly and economically label all SOM fractions and be carried out directly on samples collected from an experimental site. So δ 13C method has been utilized extensively to study origin of SOM and its fractions, to quantify C turnover, and to investigate historical changes in C_3/C_4 vegetation. With the quick development of this method and continuous improvement of various analytical techniques of the δ 13C values, the δ 13C method displays a new vitality in studying soil processes, especially soil carbon cycling. In order to promote the application of the δ 13C method in researches at home, a comprehensive summary is made in this article of factors affecting δ 13C values of SOM, and applications of the method in researching on SOM at home and abroad and the δ 13C values analytical technique.
出处
《土壤学报》
CAS
CSCD
北大核心
2005年第3期495-503,共9页
Acta Pedologica Sinica
基金
中国科学院重要方向项目(KZCX3-SW-140)
中国科学院知识创新工程项目(KZCX2-105)资助
