%0 Journal Article
%T CO2 flux characteristics from degenerated mat cryo-sod soil during plant growing period<br>植物生长季退化草毡寒冻雏形土CO2释放特征
%A ZHOU Dangwei
%A CAO Guangmin
%A ZHANG Jinxia
%A ZHAO Xinquan
%A ZHOU Xingmin
%A <br>周党卫
%A 曹广民
%J 应用生态学报
%D 2003
%I 
%X 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 12:00-14:00, and the minimum rate appeared at 6:00-8:00. 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.
%K Degenerated
%K Mat cryo
%K sod soil
%K CO
%K 2
%K emission rate
%K Seasonal dynamic
%K Daily variation<br>退化
%K 草毡寒冻雏形土
%K CO2释放速率
%K 季节变化
%K 日变化
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=76FDDAA0F7C1326E&yid=D43C4A19B2EE3C0A&vid=F3583C8E78166B9E&iid=38B194292C032A66&sid=4C2B9916B58305BE&eid=23410D0BDB501DF5&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=5&reference_num=22