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本文根据采自西藏南部、云南北部等地的７个供试土壤剖面进行了灰化淀积层诊断指标的对比研究。结果表明，《中国土壤系统分类（修订方案）》中灰化淀积层的主要诊断指标优于《中国土壤系统分类（首次方案）》中灰化起积层的原有诊断指标。前者以灰化淀积物质作为鉴别灰化淀积层的主要诊断标准，因而诊断灰化淀积物质的指标对鉴定灰化淀积层提供了更为科学而可行的定量化数据。
In this paper, based on the seven soil profiles collected from southern Tibet and northern Yunnan, a comparative study on diagnostic indicators of ashed deposition was carried out. The results show that the main diagnostic index of the ashed layer in the Chinese Soil Taxonomy (Revised) is superior to the original diagnostic index of the ashed layer in the Chinese Soil System Classification (the first scheme). The former uses ashed sediment as the main diagnostic criteria for identifying ashed deposits, and thus the indicators for the evaluation of ashed sediments provide more scientific and feasible quantitative data for identifying ashed deposits.