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The aim of this study was to determine how carbon (C) mineralization of carob (Ceratonia siliqua L., Fabaceae) soils are affected by different temperatures (23 °C and 28 °C) and humidity [field capacity (FC), 80% and 60% of their field capacity] conditions in the laboratory. | Turk J Bot 32 (2008) 123-127 © TÜB‹TAK Research Article Carbon Mineralization of Ceratonia siliqua L. Soils under Different Temperature and Humidity Conditions Emel ZENG‹N, Hüsniye AKA SA⁄LIKER*, Cengiz DARICI University of Çukurova, Faculty of Arts and Science, Department of Biology, 01330 Balcal›, Adana - TURKEY Received: 25.06.2007 Accepted: 13.02.2008 Abstract: The aim of this study was to determine how carbon (C) mineralization of carob (Ceratonia siliqua L., Fabaceae) soils are affected by different temperatures (23 °C and 28 °C) and humidity [field capacity (FC), 80% and 60% of their field capacity] conditions in the laboratory. The carob soils were taken from Çukurova University campus in the eastern Mediterranean region of Turkey. C mineralization of all soils was determined using CO2 respiration method. The microbial activity increased together with temperature increases. The microbial activity in the soils humidified at the field capacity and 60% of it was statistically lower compared to the soils humidified with 80% of field capacity at both 23 °C and 28 °C (P 0.05). At 28 °C, differences between 80% and 60% of field capacity, field capacity and 80% of field capacity, field capacity and 60% of field capacity were significant (P < 0.001, multiple comparisons by Tukey’s HSD test). As a summary, it is found that the microbial activity in the soils humidified at the field capacity and 60% of it was statistically lower compared to the soils humidified with 125 Carbon Mineralization of Ceratonia siliqua L. Soils under Different Temperature and Humidity Conditions at 28 °C (Figure 3). All these results might be explained with the fact that 28 °C is more suitable temperature than 23 °C for microbial activity. We know that temperature is also an important factor regulating microbial activity and shaping the soil microbial community (Pietikäinen et al., 2005). Rate of mineralization (% of total soil C) 80% of field capacity at both 23 °C and 28 °C (P .
