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.com
Volume 8, Issue 10 (Suppl)
J Earth Sci Clim Change, an open access
ISSN: 2157-7617
Climate Change 2017
October 19-21, 2017
CLIMATE CHANGE
October 19-21, 2017 | Rome, Italy
4
th
World Conference on
The application of
13
C pulse labeling in the partitioning of soil respiration in a
Leymus chinensis
steppe in Inner Mongolia, China
Geng Yuanbo
Chinese Academy of Science, China
I
n this study, we researched the soil respiration distinction with
13
C pulse labeling technique combining static chamber-
Keeling plot method in the Leymus chinensis grassland in Xinlin River basin, Inner-Mongolia. During the observation
period, the δ13C value of soil respiration averaged (-17.8±0.8)‰, which was at the range of -20.7‰~-15.7‰; δ13C of microbial
respiration averaged (-21.3±0.5) ‰, ranging from- 22.5‰~-19.0‰. Roots do not reflect newly assimilated C since they have
long residence time. The contribution of root respiration to soil respiration averaged (30±6) %, ranging from 7%~69%. The
fraction of root respiration to soil respiration began to increase from the middle of July and reached its peak value until the
middle of August. Then, it gradually decreased.
Biography
Geng Yuanbo has his expertise in nutrient elements cycle (C, N, Mn etc.) in grassland ecosystem and the carbon emission in cement production. He partitioned soil
respiration in steppe by root biomass exponential regression method and stable carbon isotope
13
C pulse labeling method in the Xilin River Basin, Inner Mongolia,
China. He researched CO2 emission factors from cement industry and corrected CO2 emission classification in cement production process.
gengyb@igsnrr.ac.cnGeng Yuanbo, J Earth Sci Clim Change 2017, 8:10(Suppl)
DOI: 10.4172/2157-7617-C1-036