ZHANG Chun-lin1, ZHAO Jing-bo1,2*, YANG Xiao-dong3
(1 College of Tourism and Environment Science, Shaanxi Normal University, Xi′an 710062, Shaanxi, China; 2 State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi′an 710075, Shaanxi, China; 3 Xinzhou Detachment, Shanxi People′s Armed Police Force, Xinzhou 034000, Shanxi, China)
Abstract:
Using infrared carbon dioxide monitor, carbon dioxide density in different depths of the grassland soil of Chang′an district, Xi′an city was observed consecutively. The relationships between soil carbon dioxide, temperature and soil depth were analyzed based on the meteorological data. It showed that the soil carbon dioxide density increased with the temperature. There existed significant correlation between carbon dioxide density and temperature. As a whole, carbon dioxide density of grassland soil at day is higher than that at night. In the depths of 1～4 m,the carbon dioxide density increased with the soil depth.
KeyWords:
carbon dioxide density; grassland; affecting factors
