Journal of Geology & Geophysics
Open Access
ISSN: 2381-8719
+44 1478 350008
ISSN: 2381-8719
+44 1478 350008
Zongqiang CHANG
Environmental and Engineering Research Institute, Chinese Academy of Sciences,
Lanzhou 730000
China
Research Article
Temporal Variation of Soil CO2 Efflux on Sloping Pasture of Heihe River Basin and Effects of Temperature and Soil Moisture on it
Author(s): Zongqiang CHANG, Xiaoqing LiIU, Qi FENG and Xuelong ZHANGZongqiang CHANG, Xiaoqing LiIU, Qi FENG and Xuelong ZHANG
Employing LiCor 6400 gas exchange analyzer and soil respiration chamber attachment (LiCor Inc., Lincoln, NE, USA), this paper continuously measured the soil surface CO2 effluxes on the sloping pasture of Heihe River basin from early April to late October 2010 to investigate the soil CO2 efflux rate and its feedback to the changes of climate and land use. The results showed that during the growing season, the diurnal variation of pasture soil respiration in the mountain watershed of the Heihe River valley was low at night, with lowest appears at 7:00, 6:30, 5:30, 5:00, 6:00 and 7:00 from May to October, and started to rise rapidly during 7:00~8:30, and then descend during 16:00~18:30. The maximum soil CO2 efflux appears at 15:00, 14:30, 14:30, 13:30, 14:00 and 15:00. The maximum of average soil CO2 efflux occurred in July and August, and the second was in May and September, and the thi.. View More»
DOI:
10.4172/2329-6755.1000111