Title :
Soil CO2 efflux from urban turfgrass: A major microbe-derived soil carbon process
Author :
Li Xibo ; Yang Yusheng ; Hongda Zeng ; Chen Guangshui ; Xie Jinsheng ; Zhong Xianfang
Author_Institution :
Key Lab. of Humid Subtropical Eco-Geogr. Process, Chinese Minist. of Educ., Fuzhou, China
Abstract :
Given lawns cultivation are expanding rapidly with urbanization in China and plays an important role in regional carbon cycle, but little is know about its carbon cycling. In this study, soil CO2 efflux (soil respiration, Rs) was partitioned into root (Rr) and microbial (Rh) components by using a deep-collar insertion method in Zoysia matrella lawns. Results indicated that both Rr and Rh presented pronounced seasonal patterns and were highly dependent on soil temperature and biomass. The annual Rr and Rh were 435 gC/(m2·y) and 1249 gC/(m2·y), respectively, thus the annual value of RC was 25.8%. These results suggest that the Rs of lawns in subtropical China is mainly microbe-derived.
Keywords :
atmospheric boundary layer; atmospheric composition; carbon compounds; microorganisms; soil; vegetation; CO2; China; Zoysia matrella; deep collar insertion method; lawn cultivation; microbe derived soil carbon process; regional carbon cycle; soil biomass; soil cabon dioxide efflux; soil respiration microbial component; soil respiration root component; soil temperature; urban turfgrass; urbanization; Biology; Biomass; Carbon; Ecosystems; Soil; Soil measurements; Temperature measurement; microbial respiration; root respiration; soil respiration; urban lawns;
Conference_Titel :
Water Resource and Environmental Protection (ISWREP), 2011 International Symposium on
Conference_Location :
Xi´an
Print_ISBN :
978-1-61284-339-1
DOI :
10.1109/ISWREP.2011.5893734
