THE INFLUENCE OF WATER TABLE LEVELS ON METHANE AND CARBON DIOXIDE EMISSIONS FROM PEATLAND SOILS
THE INFLUENCE OF WATER TABLE LEVELS ON METHANE AND CARBON DIOXIDE EMISSIONS FROM PEATLAND SOILS
复制标题
DOI：
10.4141/cjss89-004
复制
发表时间：
1989-02
影响因子：
1.7
通讯作者：
T. Moore;R. Knowles
中科院分区：
文献类型：
--
作者：
T. Moore;R. Knowles
二氧化碳和甲烷的演化是从填充有代表沼泽、沼泽和沼泽的表面（0-30 cm）材料的实验室柱中测量的，这些材料具有不同的地下水位，并用含有10 mg L−1溶解有机碳的水处理。随着地下水位的降低，二氧化碳的释放量呈线性关系增加，在泥炭表面以上10厘米和以下70厘米的地下水位，二氧化碳的释放量分别为0.3-0.5 g CO2 m − 2 d−1至6.6-9.4 g CO2 m−2 d−1。随着地下水位的降低，甲烷释放量呈对数关系下降。沼泽地的甲烷通量最高（淹没时为28 mg CH 4 m−2 d−1），沼泽地最低（淹没时为0.7 mg CH 4 m−2 d−1）。这些差异似乎与土壤的酸度及其微生物特性有关。二氧化碳与甲烷释放的摩尔比从淹没条件下的4增加到173，当地下水位达到70厘米深时，则增加到2500以上。关键词：甲烷，二氧化碳，甲烷，甲烷
The evolution of carbon dioxide and methane was measured from laboratory columns packed with surface (0–30 cm) materials representing a fen, a bog and a swamp and with varying water tables and treated with water containing 10 mg L−1 dissolved organic carbon. Carbon dioxide evolution increased in a linear relationship as the water table was lowered, ranging from 0.3–0.5 g CO2 m−2 d−1 to 6.6–9.4 g CO2 m−2 d−1 for the water table at 10 cm above and 70 cm below the peat surface, respectively. Methane evolution decreased in a logarithmic relationship as the water table was lowered. The fen showed the highest rates of methane flux (28 mg CH4 m−2 d−1 when inundated) and the bog the lowest (0.7 mg CH4 m−2 d−1 when inundated). These differences appeared to be related to the acidity of the soils and their microbial characteristics. Molar ratios of carbon dioxide:methane evolution increased from 4 to 173 under inundated conditions to > 2500 when the water table was at a depth of 70 cm. Key words: Methane, carbon dio...