辽河河口芦苇湿地沉积物中有机质含量的时空变化

发布时间：2018-05-25 09:48

本文选题：芦苇湿地 + 沉积物　；参考：《水土保持研究》2017年05期

【摘要】：以辽河河口芦苇湿地为研究对象,对湿地土壤沉积物中有机质含量的变化规律进行研究,分别研究了湿地沉积物中有机质(SOM)在时间、空间上的变化规律。结果表明:时间变化上,近河区和远河区的芦苇湿地沉积物中SOM含量受时间影响显著,其中在9月份和10月份SOM含量较高,9月份SOM含量出现最大值。空间变化上,纵向上只有表层0—10cm深度和其他深度(10—20cm,20—30cm,30—40cm,40—50cm)以及10—20cm与40—50cm深度的SOM含量上有显著的差异,其他深度间差异并不明显。远河区湿地沉积物在4月、5月、6月、9月、10月份时,0—10cm和10—20cm深度的沉积物中SOM含量较高,最大值多数在0—10cm深度的沉积物上。在7月份和8月份时,0—10cm深度沉积物的SOM含量最低。近河区湿地沉积物中SOM含量变化与远河区相比有差异,在4月、5月、6月、7月、8月份时受地表径流影响较为明显,SOM含量的最大值并不显著,各深度间SOM含量相差不大,20—40cm深度的SOM含量略高。在9月、10月份,SOM最大值在0—10cm深度的沉积物上,其他深度SOM含量相差不大。并且纵向上各深度间的SOM含量存在着线性相关关系。横向上在S1—3与S2—3位于缓冲区与试验区的交界处,SOM含量较高;S1—6与S2—6和S2—7位于缓冲区与核心区的交界附近且SOM含量较高,这些点的SOM含量均远高于其他各点的SOM含量。通过研究SOM含量的时空变化,更加清楚地认识SOM的变化规律,为合理利用和开发芦苇湿地以及控制湿地污染,探究碳储量提供数据支持。
[Abstract]:Taking Reed wetland in Liaohe River estuary as the research object, the changes of organic matter content in wetland soil sediment were studied, and the time and space changes of organic matter SOM in wetland sediment were studied respectively. The results showed that the content of SOM in Reed wetland sediment near river and far river area was significantly affected by time, and the SOM content was higher in September and October than that in September and September, and the maximum SOM content appeared in September. In spatial variation, there are significant differences in SOM content between surface 0-10cm depth and other depth (10-20 cm ~ (20) ~ (30) cm ~ (30) ~ (30) cm ~ (30) ~ (40) cm ~ (50) and 10-20cm and 40-50cm depth in longitudinal direction, but there is no significant difference between other depths. In April, May, June, September and October, the concentration of SOM in the sediments of wetland sediments in the Yuanhe region was higher than that in the sediments with the depth of 10-20cm and 0-10 cm, and the maximum value was in the sediments of the depth of 0-10cm. In July and August, the SOM content of sediments with 0-10 cm depth was the lowest. The variation of SOM content in wetland sediment in the near river area was different from that in the far river area, and the maximum value of SOM content was not significant in April, May, June, July and August, which was affected by surface runoff. The content of SOM in the depth of 20-40 cm was slightly higher than that in the depth of 20 ~ 40 cm. In September and October, the maximum value of SOM in the sediments of 0-10cm depth was similar to that in other depths. And there is a linear correlation between the depth of SOM content in longitudinal. Horizontally, S1-3 and S2-3 are located at the junction of buffer zone and experimental area. S1-6, S2-6 and S2-7 are located near the junction of buffer zone and core area, and SOM content is higher. The SOM content of these points was much higher than that of other points. By studying the temporal and spatial variation of SOM content, we can clearly understand the change law of SOM, and provide data support for rational utilization and development of Reed wetland, control of wetland pollution and exploration of carbon storage.
【作者单位】：沈阳农业大学水利学院;辽宁环境监测试验中心;
【基金】：国家自然科学资助项目(31200392) 辽宁省农业领域青年科技创新人才项目(2015048)
【分类号】：S153.62

【相似文献】