Soil organic matter content and composition in different pedoclimatic zones of Bulgaria | Zendy

Biser Hristov | Zendy; Е. Filcheva | Zendy

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Soil organic matter content and composition in different pedoclimatic zones of Bulgaria

Author(s) -

Biser Hristov,

Е. Filcheva

Publication year - 2017

Publication title -

eurasian journal of soil science (ejss)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.24

H-Index - 5

ISSN - 2147-4249

DOI - 10.18393/ejss.284267

Subject(s) - udic moisture regime , humus , regosol , water content , organic matter , environmental science , soil water , hydric soil , soil organic matter , soil carbon , deserts and xeric shrublands , soil science , total organic carbon , soil classification , chemistry , environmental chemistry , geology , ecology , organic chemistry , geotechnical engineering , habitat , biology , loam

Received : 13.05.2016 Accepted : 02.08.2016 The present paper focused on content, quality and composition of soil organic matter in different pedoclimatic zones of Bulgaria. The country has temperate continental climate with Mediterranean influence. There are six combinations of soil temperature and moisture regimes over the territory of Bulgaria, such as Thermic-Xeric, MesicXeric, Mesic-Ustic, Mesic-Udic, Cryic-Udic and Pergelic – Udic. Typical soil types for Bulgaria are Chernozems, Luvisols. Vertisols, Cambisols, Phaeozems, Leptosols, Regosols, Planosols, Umbrisols and etc. Fifteen soil profiles were studied which are representative for the area. The content and composition of organic matter were determined according to the method of Kononova-Belchikova. The purpose of this study is to determine the influence of pedoclimatic conditions over soil organic matter content and composition of various areas with different soil cover, vegetation, management and etc. Grouping soil types in different soil temperature and moisture regimes shows that there are similarities in soil carbon content and composition. Soils developed under cooler and moister conditions accumulate more organic carbon. In such areas the content of organic carbon can reach about 255 t.ha-1 in a surface horizon and the type of humus is predominantly Fulvic. Respectively, soils developed under dry and warmer conditions have lower organic carbon content and the type of humus is usually Humic.

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