EFFECT OF ASSIMILATE SUPPLY ON SOIL RESPIRATION IN A FOREST-STEPPE ECOTONE, NORTHERN CHINA
W. WANG
Department of Ecology, College of Urban and Environmental Sciences, and Key Laboratory for Earth Surface Processes
of the Ministry of Education, Peking University, Beijing, 100871, China
wangw@urban.pku.edu.cn
Keywords: assimilate supply, soil respiration, clipping, trenching
Abstract
Soil respiration (SR) is the primary pathway by which plant-fixed CO2 is released back to the atmosphere.
Recent studies suggested that aboveground photosynthesis activity may affect as strongly as or more strongly on SR than soil temperature. We conducted a preliminary study to explore the effect of short-term assimilate
supply on SR and to estimate the contribution of root-derived respiration to SR across 6 ecosystems in a foreststeppe ecotone, north China.
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