文献类型：期刊文献

中文题名：杭州湾滨海湿地CH_4排放通量的研究

英文题名：Study on CH_4 Emission Fluxes in Hangzhou Bay Coastal Wetland

作者：王蒙[1] 吴明[1] 邵学新[1] 盛宣才[1]

第一作者：王蒙

机构：[1]中国林业科学研究院亚热带林业研究所,国家林业局杭州湾湿地生态系统定位观测研究站

年份：2014

卷号：46

期号：6

起止页码：1003-1009

中文期刊名：土壤

外文期刊名：Soils

收录：CSTPCD;;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：国家林业公益性行业科研专项(201404210);国家自然科学基金项目(31000296);"十二五"国家科技支撑计划项目(2012 BAC13B02-2)资助

语种：中文

中文关键词：杭州湾湿地;CH4排放通量;CH4产生潜力;土壤

外文关键词：Hangzhou Bay wetland; CH4 emission flux; CH4 production potential; Soil

分类号：Q149

摘要：2013年4—9月,利用静态明箱–气相色谱法对杭州湾裸滩湿地、海三棱藨草湿地、芦苇湿地和互花米草湿地CH4排放通量进行了原位观测,并利用室内厌氧培养法测定了0-30 cm深度的土壤CH4产生潜力。结果表明：整体而言,裸滩湿地表现为CH4的吸收源,CH4排放通量春季高、夏季低;海三棱藨草湿地、芦苇湿地和互花米草湿地表现为CH4的排放源,CH4排放通量均呈现夏季高、春秋季低的季节变化。平均CH4排放通量表现为：互花米草湿地（1.589 mg/（m^2·h））〉芦苇湿地（0.722 mg/（m^2·h））〉海三棱藨草湿地（0.218 mg/（m^2·h））〉裸滩湿地（–0.068 mg/（m^2·h））,互花米草湿地各月CH4排放通量均显著高于其他湿地。0-30 cm深度平均土壤CH4产生潜力表现为：互花米草湿地（0.050μg/（g·d）〉芦苇湿地（0.042μg/（g·d））〉裸滩湿地（0.030μg/（g·d）〉海三棱藨草湿地（0.027μg/（g·d））,互花米草湿地各土层CH4产生潜力显著高于其他湿地（除0-5 cm外）。裸滩湿地土壤CH4产生潜力没有明显的空间垂直变化趋势,CH4产生潜力最大值、最小值分别出现在10-20 cm和5-10 cm土层。其他3类湿地0-5 cm土层的CH4产生潜力最大,土壤CH4产生潜力整体上随着土壤深度的增加而减小;海三棱藨草湿地和芦苇湿地5-10 cm土层的CH4产生潜力最小,互花米草湿地20-30 cm土层的CH4产生潜力最小。土壤p H、有机碳和全氮含量对CH4排放通量有显著的影响。
CH4 emission fluxes from communities of Scirpus mariqueter, Phragmites australis, Spartina alterniflora and bare mudflat in Hangzhou Bay coastal wetland were monitored in situ using the static chamber-gas chromatography method from April to September of 2013. CH4 production potentials of the 0–30 cm soil depth from the wetlands were also measured by the indoor anaerobic incubation method. The results indicated that there were remarkable seasonal variations of CH4 emission fluxes for all the studied wetlands during the observation period. Overall, the bare mudflat wetland was an absorption source of CH4, and the CH4 emission flux was higher in spring than that in summer. The other wetlands were emission sources of CH4. The CH4 emission flux was higher in summer than in spring and autumn in all the wetlands with vegetation. The average CH4 emission flux was 1.589 mg/（m^2·h） for the S. alterniflora wetland, 0.722 mg/（m^2·h） for the P. australis wetland, 0.218 mg/（m^2·h） for the S.mariqueter wetland and –0.068 mg/（m^2·h） for the bare mudflat wetland. CH4 emission flux was higher from the S. alterniflora wetland than any of the other wetlands in all the months. The average CH4 production potential from 0–30 cm soil depth from all the studied wetlands was 0.050 μg/（g·d） for the S. alterniflora wetland, 0.042 μg/（g·d） for the P. australis wetland, 0.030 μg/（g·d） for the bare mudflat wetland and 0.027 μg/（g·d） for the S.mariqueter wetland. CH4 production potential of soil from the S.alterniflora wetland was significantly higher than those of the other wetlands among all soil layers（except for 0–5 cm layer）. In the bare mudflat wetland, the highest and lowest values of CH4 production potential were found in the 10–20 cm and 5–10 cm soil layers, and no obvious spatial vertical changing trend was detected in all the soil layers. Generally, the CH4 production potential in the three wetlands with vegetation decreased with soil layer depths with the largest value in the 0–5 cm soil layer. The lowest CH4 production potential was found in the 20–30 cm soil layer for the S. alterniflora wetland, the 5–10 cm soil layer for the P. australis wetland and the S. mariqueter wetland. Soil p H, soil organic carbon and total nitrogen were the important factors affecting the CH4 emission significantly in all of the wetlands studied.