Soil respiration rates as well as soil temperature and moisture for four types of vegetation(grassland

bushes

small arbors

arbors)were monitored with Li-8100automated soil CO2flux systems at the reclamation district filled with coal gangue

which is located in Datong district of Huainan City

from July 2011to March 2012.The results indicated that diurnal variations of soil respiration for the four types of vegetationshowed a mode of single peak curve with the maximum value appearing in summer between 12:00and 16:00and the minimum value appearing in winter around 4:00AM.The soil respiration under different vegetationtypes differed significantly(p<0.05)

and its rates followed a decreasing order in vegetation types as grassland

shrubs

small arbors and arbors.The annual emission of soil CO2for four types of vegetation were999.74±62.26

908.49±72.41

869.22±56.23and 726.10±63.01g/(m2·a)

respectively.Consideringthe carbon emission reduction effects

arbors

small arbors and shrubs instead of grassland should be plantedin the study area.In addition to vegetation types

soil respiration of the area were affected by soil temperature at the depth of 10cm.The relationship between soil respiration and soil temperature was described well by anexponential equation

which explains more than 88%of the variance of soil respiration.The Q10(index of sensitvity)values of grassland

bushes

small arbors and arbors were 2.57

2.71

2.96and 3.67respectively.