Effects of addition of pure cultures of bacteria to different plant soils from East Mediterranean region on organic matter mineralization

Carbon mineralization in Calabrian Pine (Pinus brutia Ten.) and Kermes Oak(Quercus coccifera L.) soils from Çukurova University campus which is under theMediterranean climate was investigated. Mineralization was measured in natural soiland soils mixed with steriled and unsteriled poultry compost in 1/6, 1/10, 1/12compost/soil ratios. Moreover, Mineralization was measured after adding purecultures of Bacillus sp. and Pseudomonas sp. bacteria to sterile soil and sterile (soil+compost) mixture.In both soils, the microbial activity increased by addition of compost. Thisincreases, 1/10 and 1/12 ratio of composts? microbial activity were higher than in1/6. A similar increase was observed when Bacillus sp. and Pseudomonas sp. wereadded singly or in mixture.The ratio of carbon mineralization on Quercus coccifera soil was higher thanthe Pinus brutia soil both by additions of compost and bacteria.Key Words: Soil, Compost, Bacillus sp., Pseudomonas sp., Carbon mineralization.