Soil Classification Of Jiufeng National Forest Park

Soil classification is the base of survey mapping,the basis of Agricultural techniques transferring,the factor of environmental quality assessment,and also is the vector of the soil information and the media soil knowledge spreading.According to subgroup classification in China Soil Taxonmy,the subgroup "lithic-Hopli-Ustic Cambosols" is newly added and its indexing indicators are identified. Soil in the sample area is further divided into two soil orders,two suborders,three soil groups,four subgroups,six soil families and eight soil series.According to diagnostic indicators of higher categories in Key to Chinese Soil Taxonmy(3^rd edition),two soil orders are Alifisoil and Cambisol,two suborders are Ustic Argosols and Ustic Cambosols, three soil groups are Hopli-Ustic Argosols,Hopli-Ustic Cambosols and Freei-Ustic Vambosols,and four soil subgroups are typic Hopli-Ustic Cambosols,typic Hopli-Ustic Cambosols,lithic Hopli-Ustic Cambosols and lithic Ferri- Ustic Cambosols.Basic categorizes of soil classification include soil families and soil series.Four subgroups are sub-divided into six soil families.They are loamy feldspar mesic typic hopli-usticArgosols, loamy mixed-feldspar mesic typic Hopli-Ustic Argosols,loamy mixed-feldspar mesic typic Hopli-Ustic Cambosols,skeletal-loamymixed-feldsparmesic lithic hopli-ustic Cambosols, loamy feldspar mesic lithic hopli-usticCambosols and skeletal-loamy feldspar mesic lithic ferri-ustic Cambosolsrespectively.Eight soil series are named by the location of representative soil profiles,including Luobadixiakeng series,Yunxiuting series, Shanshenmiao series,Laolongbeiseries,Wulongquan series,Zhaieryu series and Jinxianan series,Beijian series.By comparing the three soil groups divided according the CST with the soil groups in the Soil Genesis,the ST and the WRB,the results of confrontation are analysed to make use of heretofore data.Comparing the Ferri-Ustic Vambosols and the typical Ferri-Ustic Vambosols,it can be found that this research area does not belong to the distribution range of Ferri-Ustic Vambosols.But because of the appearance of archaic red soil,the Ferri-Ustic Vambosols was searched in this area.It is suggested that the "Red soil-Ustic Vambosols" should be founded as a soil group in the CST.Through the analysis on the micro-morphology characteristics of Soil thin section from the two sections:northern tip of the sample area and Mu Rong-ting point,conclusion was been made as follows:the area north of the north tip has a high degree of soil humus, making organic matter form a combination with clay easily.At the same time,we can make a high overall assessment on the soil,with a proper proportion of skeleton grains and clay material,fine soil porosity,stable soil development,good water retention and Paul fertilizer;Mu Rong-ting soil has a high content of organic matter,but the degree of humification is lower,and skeleton grain size and content are much higher,meanwhile,the very little clay material,the erratic mineral shape,size and distribution,indicate that the physical structural properties is poor,and maybe the soil was confused by the artificial disturbance.