Characteristics of CO2 release from forest soil in the mountains near Beijing.
CO2 release from forest soil is a key driver of carbon cycling between the soil and atmosphere ecosystem. The rate of CO2 released from soil was measured in three forest stands (in the mountainous region near Beijing, China) by the alkaline absorption method from 2004 to 2006. The rate of CO2 released did not differ among the three stands. The CO2 release rate ranged from - 341 to 1,193 mg m(-2) h(-1), and the mean value over all three forests and sampling times was 286 mg m(-2) h(-1). CO2 release was positively correlated with soil water content and the soil temperature. Diurnally, CO2 release was higher in the day than at night. Seasonally, CO2 release was highest in early autumn and lowest in winter; in winter, negative values of CO2 release suggested that CO2 was absorbed by soil.
Faculty of Water and Soil Conservation, Beijing Forestry University, Beijing, 100083, People's Republic of China.
Xiang Yang
XY
Sun
Cheng Da
CD
Gao
Lin
L
Zhang
Su Yan
SY
Li
Yong
Y
Qiao
D002245:Carbon Dioxide / Q000032:analysis*; D002681:China; D004784:Environmental Monitoring / Q000379:methods; D012987:Soil / Q000032:analysis* / Q000737:chemistry*; D014197:Trees
D012987:Soil; D002245:Carbon Dioxide