The Influence of Soil and Air Temperature on Soil Carbon Dioxide Emission in Farmland

The aim of this study is to determine the effect of soil and air temperature on soil carbon dioxide emission. the air temperature in isparta province of turkey was measured about 20 oc during the day and 10 oc at night in the last week of september 2014. temperature difference measured for soil and air during day and night will be given in the paper. an automated cfx-2 soil carbon dioxide flux system (pp systems, hitchin, uk) was used to record soil co_2 emission for during 24 hours at 15 minutes intervals. additionally, concomitantly soil/air temperature and soil evaporation were recorded. the soil and air temperature as min, max, and average were recorded during the trials as 13.6, 16.3, 14.9 and 2.1, 28.9, 14.1 oc the for mentioned period, respectively. besides, soil co_2 emission as min, max and average was recorded as 0.014, 0.22, 0.07 g co_2 m^-2h^-1 respectively. results showed that the soil temperature did not affect soil co_2 emission (r=0.05). however, air temperature affected soil co_2 emission (r=0.58).