Soil Taxonomy Of Typical Tobacco Fields In CATTR And FATTR

Soil is an important natural resource for human survival and development,only in the s cientific understanding of the foundation soil resources.flue cured tobacco is an important economic crop in china,based on the soil of china fragrance and flavortobacco growing a rea as the research object,on the basis of "Keys to Chinese Soil Taxonomy (3rd editio n)"division of soil classification system advanced unit and through the analysis on the co mparison of different soil types,summarizes the two types of tobacco in the area of soil types.70 soil profiles located in nineteen counties of three provinces(Fujian,Yunnan,Sichua n) of clean aroma type tobacco region(CATTR) and 28 soil profiles located in twelve co unties of four provinces (Henan,Shanxi,Guangdong,Jiangxi) of full aroma type tobacco reg ion(FATTR) were observed.The main conclutions are follows:(1) CATTR retrieve 7 Order(Anthrosols,Ferralosols,Gleyosols,Ferrosols,Argosols,Cambos ols,Primosols),9 Suborder,21 Group,33 Subgroup.FATTR retrieve 4 Order(Anthrosols,Argos ols, Cambosols,Primosols),5 Suborder,9 Group,13 Subgroup.(2) CATTR retrieve 17 Diagnostic characteristics(Udic soil moisture regime,Thermic soil temperature regime,Redox features,Ferric property etc). FATTR retrieve 9 Diagnostic chara cteristics(Udic soil moisture regime,Mesic soil temperature regime,Alic property,Calcaric pr operty etc). The Mesic soil temperature regime did not appear in the CATTR,Redox feat ures and Ferric property of occurrence of iron was higher than that of FATTR, Calcaric pr operty in FATTR more frequently than CATTR.(3) CATTR retrieve Diagnostic horizons include (Agric horizon,Hydragric horizon,LAC-f erric horizon,Cambic horizon,Agric horizon,Ferralic horizon),but lower frequency of occurr ence.FATTR Agric horizon higher frequency of occurrence, Cambic horizon, Hydragric ho rizon, Ferralic horizon lower frequency of occurrence.Agric horizon and LAC-ferric horiz on does not appear.(4) The main soil types of CATTR of Anthrosols, Ferralosols, Argosols, Cambosols,Ferro sols. The main soil types of FATTR of Anthrosols, Argosols, Cambosols, Primosols.Argosol s of FATTR is higher than the proportion of prototype for faint scent CATTR. Anthrosols of CATTR is higher than the proportion of prototype for faint scent FATTR. Cambosols of FATTR is higher than the proportion of prototype for faint scent CATTR. Ferralosols and Ferrosols for distribution in FATTR.