黄河口沼泽土壤中三种形态还原性无机硫含量及其影响因素研究  

Contents of Three Forms of Reduced Inorganic Sulfur in Soil in Marshes of the Yellow River Estuary and Their Influencing Factors

作　　者：杨云斐 杨继松 刘学 孙丹丹 桑娈 宁凯 王志康 栗云召 于君宝 YANG Yunfei;YANG Jisong;LIU Xue;SUN Dandan;SANG Luan;NING Kai;WANG Zhikang;LI Yunzhao;YU Junbao(Institute for Advanced Study of Coastal Ecology,School of Resources and Environmental Engineering,Ludong University,Yantai 264025,Shandong,P.R.China;Dongying Academy of Agricultural Sciences,Dongying 257091,Shandong,P.R.China)

机构地区：[1]鲁东大学滨海生态高等研究院,资源与环境工程学院,山东烟台264025 [2]东营市农业科学研究院,山东东营257091

出　　处：《湿地科学》2022年第2期205-215,共11页Wetland Science

基　　金：国家自然科学基金项目(41871087、U1806218和31800011);黄河三角洲学者人才工程项目资助。

摘　　要：于2020年9月,在黄河北岸由河岸至海岸地带的芦苇(Phragmites australis)淡水沼泽、芦苇盐沼、柽柳(Tamarix chinensis)盐沼、盐地碱蓬(Suaeda salsa)盐沼、互花米草(Spartina alterniflora)盐沼中,采集0~10 cm深度、10~20 cm深度、20~30 cm深度和30~40 cm深度的土壤样品,采用冷扩散三步连续提取法,测定出5处采样地各深度土壤样品的酸可挥发性硫、铬还原性硫和单质硫含量,计算出土壤无机硫还原速率。研究结果表明,在黄河口芦苇淡水沼泽、芦苇盐沼、柽柳盐沼、盐地碱蓬盐沼、互花米草盐沼0~40 cm深度土壤还原性无机硫含量(酸可挥发性硫含量、铬还原性硫含量和单质硫含量)中,互花米草盐沼0~40 cm深度土壤中还原性无机硫含量最大,芦苇盐沼的次之,柽柳盐沼、盐地碱蓬盐沼、芦苇淡水沼泽的相差不大;在芦苇淡水沼泽、芦苇盐沼、柽柳盐沼、盐地碱蓬盐沼和互花米草盐沼0~40 cm深度土壤3种形态硫含量占还原性无机硫含量的比例中,总体上,铬还原性硫含量所占比例(44%~70%)最大,酸可挥发性硫含量所占比例(16%~48%)次之,单质硫含量所占比例(3%~33%)最小,而且互花米草盐沼0~40 cm深度土壤中单质硫含量所占比例只有3%~5%;土壤总有机碳含量、含水量、黏粒含量所占比例和粉粒含量所占比例是还原性无机硫含量的直接影响因素,土壤总有机碳含量、溶解性有机碳含量、全氮含量和黏粒含量所占比例是土壤中无机硫还原速率的直接影响因素。In September 2020, the soil samples were collected at depths of 0-10, 10-20, 20-30 and 30-40 cm in Phragmites australis freshwater marsh, Phragmites australis salt marsh, Tamarix chinensis salt marsh, Suaeda salsa salt marsh and the Spartina alterniflora salt marsh along the northern bank of the Yellow River. The contents of acid volatile sulfur, chromium reducible sulfur and elemental sulfur in soil samples at each depth of 5 sampling sites were determined by the cold diffusion three-step continuous extraction, and the reduction rate of inorganic sulfur was calculated. The results showed that, the contents of reducing inorganic sulfur(acid volatile sulfur content, chromium reducible sulfur content and simple sulfur content) at 0-40 cm depth were determined in the marshes. The contents of reducing inorganic sulfur in the soil at 0-40 cm depth of Spartina alterniflora salt marsh were the highest, followed by Phragmites australis salt marsh. There was little difference among Tamarix chinensis salt marsh, Suaeda salsa salt marsh and Phragmites australis freshwater marsh. In the study of proportion of three forms of reduced inorganic sulfur in the soil at 0-40 cm depth among the marshes, the proportion of chromium reducible sulfur(44%-70%) was the largest, followed by the proportion of acid volatile sulfur(16%-48%), the proportion of elemental sulfur(3%-33%) was the lowest. The content of elemental sulfur in the soil at 0-40 cm depth of Spartina alterniflora salt marsh was only 3%-5%. Contents of total organic carbon and water, and the proportions of clay and silt of the soil were the direct influencing factors of reduced inorganic sulfur content. Contents of total organic carbon, dissolved organic carbon and total nitrogen, and the proportion of` clay can directly affect the inorganic sulfur reduction rate.

关 键 词：酸可挥发性硫 铬还原性硫 单质硫 还原性无机硫 还原速率 土壤 沼泽 黄河口 

分 类 号：X14[环境科学与工程—环境科学]