اثر پوشش‌های درختچه‌ای مختلف اقلیم نیمه‌خشک بر شاخص‌های میکروبی کربن خاک

Microbial respiration in the soil under wood covers constitutes a significant rate of carbon dioxide emissions in terrestrial ecosystems and is very sensitive to climate and environmental changes such as temperature, soil moisture and type of vegetation. Therefore, a change in soil microbial respiration can change the balance of atmospheric carbon dioxide concentration and thus affect future climate conditions. Soil moisture and temperature are the two main abiotic factors that regulate soil microbial respiration. Humidity and temperature may directly or indirectly affect microbial and enzymatic activities. In a semi-arid climate, this study investigated the effect of shrub covers Carpinus orientalis Miller, Crataegus microphylla C. Koch, Berberis integerrima Bunge, Prunus spinosa L and Rhamnus pallasii Fisch. and C. A. Mey on the rate of carbon mineralization and soil microbial efficiency. The results showed that the average rate of carbon mineralization and microbial efficiency were the highest under Carpinus orientalis. Also, the rate of carbon mineralization and soil microbial efficiency under different covers of semi-arid climate showed a statistically significant difference.