Abstract：The effects of environment factors on soil respiration rate in coastal protection forest have been studied . The results indicate that the daily soil respiration rate of the mixed plantation and shrub forest varied with a regular single apex rhythm, and the soil respiration of the latter is higher than that of the former. The surface temperature is the most important influencing factor on soil respiration rate, which has clear prominent positive and the obvious positive correlation with the soil respiration rate of the mixed plantation and shrub forest respectively, the air relative humidity at 1.5m above the surface ground has a negatively prominent influence on the soil respiration rate of the mixed plantation, and so as the influence of the wind speed on the soil respiration of shrub forest. Through the methods of main components analysis and multiple linear regressions, the main environment factors were found and two multiple linear regression models between the soil respiration rate and environment factors were set up.
2005, Vol. 3 
