土壤时间序列在研究土壤演化速率与方向、建立土壤发生演化模型上具有重要的价值,并且能为土壤发生学理论的验证提供宝贵的信息.为了获得可靠的结果,时间序列的构建必须包括剖面内与剖面间母质均一性或母质不连续性的判定以及土壤的绝对或相对年龄的判定这两个重要过程.本文综述了土壤时间序列的类型及其构建方式,详细论述了在时间序列建立过程中母质不连续性的判定方式与土壤定年方法,并阐明了土壤时间序列方法在土壤发生研究中的重要意义,旨在为正确建立土壤时间序列、深刻理解土壤发生中的时间因素提供较为详尽的参考.%Soil chronosequences are valuable tools for investigating rates and directions of soil evolution and their modeling as well as for testing theories of pedogenesis. To obtain reliable results, the establishment of soil chronosequences must consist of two critical processes, i. e. quantitative identification of parent material uniformity or lithologie discontinuities (LDs) between and within profiles of the chronosequence, and identification of age of the soils with numerical or geochronometric dating methods and surface exposure (relative) dating methods. In this paper, types and constructing procedures of soil chronosequences, and in detail, the detection methods of parent material uniformity or LDs as well as age dating techniques are reviewed,with a view to providing detailed references for correct construction of soil chronosequences and better understanding the effects of the time factor on soil development. In addition, this paper discusses the significance of the chronosequence approach in pedogenesis research.
展开▼
