The simulated Quercus liaotungensis was planted and the soil respiration was measured,the soil and trees of Quercus liaotungensis and some grass species being sampled from a deciduous forest in Beijing mountain areas.The three year's experiments showed that the soil respiration of Quercus liaotungensis forest averaged 5.92±1.32μmol CO 2m -2 s -1 ,in which the highest appeared in August,while the lowest in October.The series of soil respiration was arranged:August>July>June>September>October(...