Classification of Ferrallitic Soils in Chinese Soil Taxonomy

摘要

The development of the classification of ferrallitic soils in China is reviewed and the classification of rnFerralisols and Ferrisols in Chinese Soil Taxonomy is introduced in order to discuss the correlation between rnthe ferrallitic soil classification in the Chinese Soil Taxonomy and those of the other soil classification systems.rnIn the former soil classification systems of China, the ferrallitic soils were classified into the soil groups of rnLatosols, Latosolic red soils, Red soils, Yellow soils and Dry red soils, according to the combination of soilrnforming conditions, soil-forming processes, soil features and soil properties. In the Chinese Soil Taxonomy,rnmost of ferrallitic soils are classified into the soil orders of Ferralisols and Ferrisols based on the diagnostic rnhorizons and/or diagnostic characteristics with quantitatively defined properties. Ferralisols are the soils rnthat have ferralic horizon, and they are merely subdivided into one suborder and two soil groups. Ferrisols rnare the soils that have LAC-ferric horizon but do not have ferralic horizon, and they are subdivided into rnthree suborders and eleven soil groups. Ferralisols may correspond to part of Latosols and Latosolic red soils.rnFerrisols may either correspond to part of Red soils, Yellow soils and Dry red soils, or correspond to part of rnLatosols and Latosolic red soils.