Genetic Characteristics And Taxonomic Classification Of The Representative Soils In Chengdu,deyang,and Mianyang Region

Quantitative and standardized soil taxonomy is currently the international standard for soil classification,soil system classification based on diagnostic level and diagnostic characteristics.The unique climate and environment of Sichuan Cheng,De,and Mian region create the diversity and complexity of soil types in this area,based on quantitative and standardized classification principles,33 representative soil profiles in different regions of Sichuan Cheng,De and Mian were selected.Through field collection of soil profiles,collection of related materials,indoor analysis and other steps,according to the ChineseSoil Taxonomy(Third Edition),determine the diagnostic layer and diagnostic characteristics of the collected soil,and ascertain the attribution of the collected soil in Chinese soil taxonomy.The results of the study show that:(1)According to the Chinese Soil Taxonomy(Third Edition),the diagnostic surface horizon of the sample area is:Ochric epipedons,Anthropic epipedon;the subsurface horizon of the diagnosis are :Cambic horizon,Hydragric horizon,Argic horizon;the diagnostic characteristics:Soil moisture regimes,Soil temperature regimes,Calcaric property,Redoxic features,Gleyic features,Ferric property,Lithologic characters,Lithic contact,Paralithic contact.(2)According to the Chinese Soil Taxonomy(Third Edition),the soil of the sample area is divided into 4 orders:Cambosols,Argosols,Anthrosols,Primosols.The soil of the sample area is divided into 6 Suborders:Aquic Cambosols,Alluvic Primosols,Udic Cambosols,Udic Argosols,Stagnic Anthrosols,Orthic Primosols,and13 CST Group and 14 CST Subgroups.Thirty-three soil series were established for Thirty-three soil families.