LI Tao1,2， ZHANG Mei-lang1，CAO Jian-hua1， HUANG Yan-mei1,2，CHEN Jia-rui1,2， YAN Yi-ping1,2
(1. Karst Dynamics Laboratory, Institute of Karst Geology, CAGS, Guangxi Guilin 541004, China;
2. The College of Life Science, Guangxi Normal University,Guilin 541004, China)
Abstract: Taking the Karst Experimental field in the Panlong cave in Guilin as the test site, selecting scrub brushes on the hillside and depressions , monitoring seasonal variations, spatial distribution and daily variation of the soil CO2 emission volume for a long period of time on a regular basis, once can seen clearly that: (1) either on the slope or in the depressions, the soil CO2 emission volume is greater in the top soil than in the deep soil in spring and summer, and the case is opposite in autumn and winter. Also, the emission volume is greater on the hillside than in the depressions; (2) the emission volume of soil CO2 shows obvious seasonal variations. It is 1-3 times higher in summer and autumn (6-9 months) than that in the other periods, and it is also closely related with temperature, soil moisture and biological activity.
Key words: Panlong cava, Guilin；carbon cycle；soil CO2；emission volume
EARTH AND ENVIRONMENT Vol. 39, No.3, Tot No.285, 2011, Page 343-348
