[CO2 flux characteristics from degenerated mat cryo-sod soil during plant growing period].
Ying Yong Sheng Tai Xue Bao
; 14(3): 367-71, 2003 Mar.
Article
in Zh
| MEDLINE
| ID: mdl-12836543
ABSTRACT
The carbon dioxide (CO2) emission rate was studied in the degenerated mat cryo-sod soil covered with alpine Kobresia humilis meadow at the Haibei alpine meadow ecosystem research station, with CID-301 ps CO2 analytical instrument during plant growth period (May-Sep, in 1998). The results showed that the CO2 emission rate had obvious daily variation and seasonal dynamics. The maximum rate of CO2 emission appeared at 1200-1400, and the minimum rate appeared at 600-800. The max daily amplitude was 462.49 mg.m-2.h-1, while the minimum daily amplitude was 114.97 mg.m-2.h-1. The CO2 emission rate varied with phonological periods, and the order was exuberance > withering > green up. The maximum daily average value was 480.76 mg.m-2.h-1 (Aug.18th), and the minimum daily average value was 140.77 mg.m-2.h-1 (May.9th). Correlation analysis showed that there was a significant relationship between CO2 emission rate and air temperature, soil surface temperature and soil temperature in 5 cm, 10 cm, 15 cm, 20 cm, and 30 cm. Temperature was the dominant factor that affected the CO2 emission rate in degenerated mat cryo-sod soil.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Soil
/
Carbon Dioxide
/
Plant Development
Language:
Zh
Journal:
Ying Yong Sheng Tai Xue Bao
Journal subject:
SAUDE AMBIENTAL
Year:
2003
Document type:
Article
Affiliation country:
China