向海湿地全硫与有效硫垂向分布

选取霍林河下游向海沼泽湿地为研究对象,采用重力沉积芯采样钻钻孔采样方法,采集了2个沉积柱芯共78个样品,对不同粒级沉积物全硫与有效硫及TOC,pH在剖面中的分布进行高分辨率研究。结果表明,芦苇沼泽与沼泽化草甸沉积物全硫与有效硫平均含量高值均出现在细粒,即粉砂与黏土粒级中。向海湿地沉积物全硫接近于世界土壤中硫的平均含量700 mg/kg。虽然程度不同,但不同粒径沉积物除剖面特殊层序外均呈现出一定的分层性:即从上到下,全硫的含量呈递减趋势,并且硫主要富集在草根层。沉积物中有机质含量对沉积物中硫的贡献起着十分重要的作用,一般而言,有机质含量高,总硫、有效硫含量也高,反之亦然。但随沉积环境不同,并非每种粒径沉积物中硫与有机质都有很大相关性。

Vertical Distribution of Total Sulfur and Available Sulfur in Xianghai Wetlands

A case study to the Xianghai marsh wetlands at downstream of the Huolin river is conducted. Core samples were taken with a gravity corer. Two cores and 78 samples were taken and studied with high-resolution to total sulfur, available sulfur, TOC and pH in different grain size sediments. Results displayed that the high values of total sulfur and available sulfur all existed at granule (silt and clay) in both reed marsh and gleying grassland. Average contents of total sulfur in Xianghai wetlands were close to 700 mg/kg-the average content of total sulfur in world soils. From the top down, contents of total sulfur presented decrease by degrees in different grain size sediments and enriched in the layer of grass roots. Generally speaking, total sulfur and available sulfur increased with TOC.