%0 Journal Article
%T Temporal variation of soil respiration on sloping pasture of Heihe River basin and effects of temperature and soil moisture on it<br>黑河流域山区牧坡草地土壤呼吸的时间变化及水热因子影响
%A CHANG Zongqiang~
%A SHI Zuomin~
%A FENG Qi~
%A SU Yonghong~
%A <br>常宗强
%A 史作民
%A 冯起
%A 苏永红
%J 应用生态学报
%D 2005
%I 
%X Employing LiCor 6400 gas exchange analyzer and soil respiration chamber attachment (LiCor Inc., Lincoln, NE, USA), this paper continuously measured the soil surface CO2 effluxes on the sloping pasture of Heihe River basin from early April to late October 2003 to investigate the soil CO2 efflux rate and its feedback to the changes of climate and land use. The results showed that from May to October, the diurnal variation of soil respiration was low at night, the lowest at 7:00, 6:30, 5:30, 6:00 and 7:00, raised rapidly at 7:00 - 8:30, and then descended at 16:00 - 18:30. The maximum soil CO2 efflux appeared at 15:00, 14:30, 14:30, 13:30, 14:00 and 15:00. The mean daily soil respiration rate was 0.31 - 6.98 micromol m(-2) s(-1), with the maximum in July and August, the second in May and September, and nearly consistent in April and October. Soil respiration rate had an exponential and power correlation with temperature and soil moisture, respectively.
%K Soil respiration rate
%K Growth season
%K Temperature
%K Soil moisture
%K Sloping pasture
%K Heihe River basin<br>土壤呼吸速率
%K 生长季节
%K 温度
%K 土壤水分
%K 牧坡草地
%K 黑河流域
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=743B85B3404F3A4C&yid=2DD7160C83D0ACED&vid=7801E6FC5AE9020C&iid=9CF7A0430CBB2DFD&sid=2E97FDBA239991ED&eid=C20D616EFC5754AE&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=16&reference_num=23